The Higdon deposit is located on the east flank of the St. Francois Mountains, approximately 11.5 km NE of Fredericktown, MO in the Mine LaMotte-Fredericktown district of the world renown Southeast Missouri (SEMO) region of Mississippi Valley-type (MVT) deposits. It was discovered in the 1950s and an attempt to mine the deposit was made in the 1960s. In the 2000s the importance of the Higdon deposit increased after extensive exploration by The Doe Run Mining Co. revealed a larger deposit, greater Ni-Co content than initially estimated and the presence of a low grade Unconformity-type Uranium deposit, similar to those of the Athabasca Basin in Canada. The overall paragenetic sequence, stratigraphy and stratigraphic controls of the Higdon deposit resembles those present in other SEMO MVT deposits located at the east flank of the St. Francois Mountains. The stratigraphy includes the Cambrian formations: Eminence, Potosi, Derby-Doe Run, Davis, Bonneterre and Lamotte which unconformably overlies Precambrian granitic intrusions. A common feature is the presence of collapse breccias especially at the base of the Bonneterre Formation and a relatively thin Lamotte Formation. Fine-grained, disseminated sulfides of Fe, Pb, Zn, Co and Ni are hosted in the lower one third of the Bonneterre Formation and upper two thirds of the Lamotte Formation, in a series of grainstone beds, open spaces in collapse breccias, near pinch outs of the Lamotte Formation against basement highs. Disseminations and nodules of pitchblende (uraninite) occur through the entire Lamotte Formation. The Higdon deposit differs in several important ways from the deposits of the Viburnum Trend on the west flank of the St. Francois Mountains. These differences include a distinctly lower stratigraphic interval of collapse breccias and mineralization, greater abundance of Co-Ni minerals, presence of pitchblende, and a significant fault control of mineralization. Several regionally extensive high angle faults aligned parallel to the NW-striking Simms Mountain and Mine LaMotte fault systems bound the deposit, especially the high Ni-Co-U portion. Petrographic and microprobe studies at Higdon revealed a mineral paragenetic sequence of uraninite (pitchblende, within a carbon matrix), pyrite, marcasite, chalcopyrite, bravoite, siegenite, gerdorsffite, sphalerite and galena. These minerals were deposited in four different stages: (1) a U dominated stage that precipitated the pitchblende during Early Ordovician to Permian time; (2) a Fe sulfide dominated sulfide characterized by pyrite, marcasite and bravoite; (3) a Cu-Co-Ni stage dominated by chalcopyrite and siegenite, and (4) a Zn-Pb stage characterized by the precipitation of sphalerite and galena. Precambrian uraniferous granitic intrusions in the vicinity of the Higdon deposit supplied the U for the pitchblende mineralization. At Higdon the U mineralization represents an overlapping deposit in an otherwise MVT system. This required leaching by fluids migrating through the basement along high angle faults and U precipitation in a reducing environment as the fluids encountered the Lamotte Formation. The Ni and Co were possibly leached from mafic and ultramafic intrusions along the Reelfoot Rift or from the Precambrian basement and transported to the Higdon area by fluids migrating along the regional NW-trending faults. Mixing with connate Pb-Zn brines moving laterally through the Lamotte Sandstone and other permeable units may have triggered the sulfide precipitation. Finally, the Higdon deposit is anomalous in the tonnage and grade of its Ni-Co resource (0.17 % Ni, 0.14 % Co) with significant values contained in siegenite (30.9 % Ni, 23.9 % Co), bravoite (0.04 % Ni, 6.3 % Co), gerdorsffite (26.1 % Ni, 8.0 % Co) and marcasite-pyrite (0.3 % Ni, 0.2 % Co).

Thesis is amed on the usage of the simulation software NI Multisim Education in education on elementary and secondary school. The output of this work is many problems of chosen analog and digital technique tasks and then subsequently verification of elaborated tasks in lessons. Another part of work is user manual for simulating software MI Multisim Education. Possibilities and requirement of using simulation software in education on elementary and secondary school is investigated, so well as problems which is brought by using software on standard school. Part of the work is comparison of avaiable solutions and recommend witch software choose.

Submitted by Rosana Amâncio (rosana.amancio@ufcg.edu.br) on 2018-07-27T13:48:39Z No. of bitstreams: 1 MISLENE PEREIRA LINS -DISSERTAÇÃO PPGCNBio 2015.pdf: 7222188 bytes, checksum: 9441b1d0282367ee9dacbecdcd6873d8 (MD5) / Made available in DSpace on 2018-07-27T13:48:39Z (GMT). No. of bitstreams: 1 MISLENE PEREIRA LINS -DISSERTAÇÃO PPGCNBio 2015.pdf: 7222188 bytes, checksum: 9441b1d0282367ee9dacbecdcd6873d8 (MD5) Previous issue date: 2015-04-16 / CNPq / A eletrodeposição de um simples metal ou de suas ligas é atualmente de grande importância nas diversas áreas de engenharia e tecnologia. Dessa forma, as técnicas eletroquímicas para obtenção de revestimentos pelo processo de eletrodeposição são amplamente estudadas. Pelo processo de eletrodeposição podem ser obtidos filmes finos de óxidos metálicos com propriedades bem específicas para determinado uso. Através da utilização de métodos eletroquímicos é possível avaliar o comportamento relacionado a corrosão de um metal ou sua liga. Neste trabalho investigou-se os parâmetros operacionais para eletrodeposição da liga Ni-PW utilizando-se glicina como agente complexante. Para este estudo realizou-se um planejamento experimental 23, com composto central. As variáveis estudadas foram densidade de corrente, pH do banho eletrolítico e temperatura do banho. A liga Ni-P-W foi depositada sobre substrato de cobre de área superficial total de 8 cm2. A composição da liga foi obtida por meio da utilização de energia dispersiva de raios-X. A morfologia foi obtida por meio de microscopia eletronica de varredura. Foi feito medidas de difratometria de raios-X e de microdureza Vickers. No estudo de corrosão foram utilizadas as medidas de polarização potenciodinâmico linear realizados em NaCl 3,5%. As análise de composição química mostraram que as ligas obtidas apresentaram elevadas porcentagens de Ni e P e traços de W. As análises de morfologia das ligas obtidas mostram revestimentos com superfície homogênea e morfologia nodular bem definida para depósitos com maior porcentagem de P. Ligas com uma menor porcentagem de P apresentaram nódulos de tamanhos variados, e uma elevada quantidade de trincas. Os depósitos obtidos apresentaram comportamento amorfo. Os ensaios de corrosão mostraram que os revestimento obtido com densidade de corrente de 70 mA/cm2, pH 6,5 e temperatura de 63,5 oC apresentou os melhores resultados para resistência a polarização e corrente de corrosão. / The electrodeposition of a simple metal or alloy is currently of great importance in many areas of engineering and technology. Thus, electrochemical techniques to obtain coatings by electrodeposition process are widely studied. By electrodeposition process there can be obtained thin films of metal oxides with very specific properties for specific use. Through the use of electrochemical methods it is possible to evaluate the corrosion related behavior of a metal or its alloy. In this study we investigated the operating parameters of Ni-P-W alloy plating using glycine as a complexing agent. For this study was made an experimental design 23 with central composite variables studied were current density, the electrolytic bath pH and bath temperature. The Ni-P-W alloy was deposited on copper substrate of total surface area 8 cm2. The composition of the alloy was obtained by using energy dispersive X-ray (EDX). The morphology of the Ni-PW electroplated alloy was obtained by Scanning Electronic Microscopy (SEM). Measurements of X-ray diffraction and Vickers microhardness were made. The linear potentiodynamic polarization (LPP) corrosion measurements were carried out in NaCl 3.5% in the study of corrosion. Chemical composition analysis showed that the obtained alloys showed high percentages of Ni and P and low of W. The analysis of the obtained alloys shows coatings with homogeneous surface and well defined nodular morphology for deposits with the highest percentage of P. Alloys with a lower percentage of P showed varying sizes of nodules, and a high percentage of cracks. The deposits obtained showed amorphous behavior. The corrosion tests showed that the coating obtained with current density 70 m/cm2, pH 6.5 and temperature of 63.5 °C showed the best results for the polarization resistance and corrosion current.

abstract: The presence of a number of extinct radionuclides in the early Solar System (SS) is known from geochemical and isotopic studies of meteorites and their components. The half-lives of these isotopes are short relative to the age of the SS, such that they have now decayed to undetectable levels. They can be inferred to exist in the early SS from the presence of their daughter nuclides in meteoritic materials that formed while they were still extant. The extinct radionuclides are particularly useful as fine-scale chronometers for events in the early SS. They can also be used to help constrain the astrophysical setting of the formation of the SS because their short half-lives and unique formation environments yield information about the sources and timing of delivery of material to the protoplanetary disk. Some extinct radionuclides are considered evidence that the Sun interacted with a massive star (supernova) early in its history. The abundance of 60Fe in the early SS is particularly useful for constraining the astrophysical environment of the Sun's formation because, if present in sufficient abundance, its only likely source is injection from a nearby supernova. The initial SS abundance of 60Fe is poorly constrained at the present time, with estimates varying by 1-2 orders of magnitude. I have determined the 60Fe-60Ni isotope systematics of ancient, well-preserved meteorites using high-precision mass spectrometry to better constrain the initial SS abundance of 60Fe. I find identical estimates of the initial 60Fe abundance from both differentiated basaltic meteorites and from components of primitive chondrites formed in the Solar nebula, which suggest a lower 60Fe abundance than other recent estimates. With recent improved meteorite collection efforts there are more rare ungrouped meteorites being found that hold interesting clues to the origin and evolution of early SS objects. I use the 26Al-26Mg extinct radionuclide chronometer to constrain the ages of several recently recovered meteorites that sample previously unknown asteroid lithologies, including the only know felsic meteorite from an asteroid and two other ungrouped basaltic achondrites. These results help broaden our understanding of the timescales involved in igneous differentiation processes in the early SS. / Dissertation/Thesis / Ph.D. Geological Sciences 2012

Submitted by Luciana Ferreira (lucgeral@gmail.com) on 2018-07-27T14:20:48Z No. of bitstreams: 2 Dissertação - Aleckson Souto Silva - 2018.pdf: 4136117 bytes, checksum: 733a03156cbc3f72a6ac8bc4daff6b54 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2018-07-27T14:36:23Z (GMT) No. of bitstreams: 2 Dissertação - Aleckson Souto Silva - 2018.pdf: 4136117 bytes, checksum: 733a03156cbc3f72a6ac8bc4daff6b54 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2018-07-27T14:36:23Z (GMT). No. of bitstreams: 2 Dissertação - Aleckson Souto Silva - 2018.pdf: 4136117 bytes, checksum: 733a03156cbc3f72a6ac8bc4daff6b54 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2018-06-18 / Conselho Nacional de Pesquisa e Desenvolvimento Científico e Tecnológico - CNPq / The present work aims to the development of voltammetric sensors based on α-Ni(OH) 2 /GO and α- Ni(OH) 2 /rGO nanocomposites for detection and determination of uric acid, paracetamol and ascorbic acid by differential pulse voltammetry. For this, nanostructured nickel hydroxide stabilized in the alpha polymorphic form associated with graphene oxide (GO) or reduced graphene oxide (rGO) were synthesized and characterized. The method used for synthesis of α- Ni(OH) 2 was Tower’s modified, for oxidized graphite was that of Hummers and reduced graphene oxide was that of Stankovich. X-ray diffractometry, confocal Raman spectroscopy, cyclic voltammetry, transmission electron microscopy, infrared spectroscopy and thermogravimetric analysis were used to characterize the synthesized nanomaterials. The presence of graphene oxide and reduced graphene oxide with nickel hydroxide was confirmed by the results. The nickel hydroxide/graphene composites arouse great interest for the development of electrochemical sensors due to their good cost-effectiveness, biocompatibility and high catalytic effect. The thin films of α-Ni(OH) 2 /GO and α-Ni(OH) 2 /rGO showed better electrical properties compared to thin film of α-Ni (OH) 2 and it can be attributed to the increase in surface area and electrical conductivity. Through the differential pulse voltammetry, α-Ni(OH) 2 /GO and α-Ni(OH) 2 /rGO films presented good linear relationship between peak current and uric acid, ascorbic acid and paracetamol concentrations in the range concentration of 0.099 mmol.L -1 – 1.38 mmol.L -1 , with linear coefficients higher than 0.993 and detection limit lower than 2,645x10 -5 mol.L -1 for uric acid, 2,080x10 -5 mol. L -1 for ascorbic acid and 4.248x10 -5 mol. L -1 for paracetamol. / Este trabalho tem como objetivo o desenvolvimento de sensores voltamétricos baseados em nanocompósitos de α-Ni(OH) 2 /GO e α-Ni(OH) 2 /rGO para detecção e determinação de ácido úrico, paracetamol e ácido ascórbico através da voltametria de pulso diferencial. Para isso, hidróxido de níquel nanoestruturado e estabilizado na fase polimórfica alfa associado a óxido de grafeno (GO)ou óxido de grafeno reduzido (rGO) foram sintetizados e caracterizados. O método utilizado para a síntese do α-Ni(OH) 2 foi o de Tower modificado, o óxido de grafeno foi o de Hummers e o óxido de grafeno reduzido foi o de Stankovich. Para a caracterização dos nanomateriais sintetizados foram empregados a difratometria de raios-X, espectroscopia Raman confocal, voltametria cíclica, microscopia eletrônica de transmissão, espectroscopia no infravermelho e análises termogravimétricas. Sendo confirmados através dos resultados a presença de óxido de grafeno e óxido de grafeno reduzido junto ao hidróxido de níquel. Os compósitos de hidróxido de níquel/grafeno despertam grande interesse para o desenvolvimento de sensores eletroquímicos, devido a sua boa relação custo-benefício, biocompatibilidade e alto efeito catalítico. Os filmes finos de α-Ni(OH) 2 /GO e α-Ni(OH) 2 /rGO apontaram melhores propriedades elétricas compara ao filme fino de α-Ni(OH) 2 podendo ser atribuído ao aumento da área superficial e aumento da condutividade elétrica. Através da voltametria de pulso diferencial os filmes α-Ni(OH) 2 /GO e α- Ni(OH) 2 /rGO apresentaram boa relação linear entre a corrente de pico e a concentração de ácido úrico, ácido ascórbico e paracetamol na faixa de concentração de 0,099 mmol.L -1 – 1,38 mmol.L -1 , com coeficientes lineares superiores a 0,993 e limite de detecção inferiores a 2,645x10 -5 mol.L -1 para o ácido úrico, 2,080x10 -5 mol.L -1 para o ácido ascórbico e 4,288x10 -5 para o paracetamol.

Submitted by Fabio Sobreira Campos da Costa (fabio.sobreira@ufpe.br) on 2015-06-02T12:07:02Z No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Microsoft Word - dissertacaofinal savio 26-05-15.pdf: 914008 bytes, checksum: f1883a7299b5bce667262496a1306f93 (MD5) / Made available in DSpace on 2015-06-02T12:07:02Z (GMT). No. of bitstreams: 2 license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Microsoft Word - dissertacaofinal savio 26-05-15.pdf: 914008 bytes, checksum: f1883a7299b5bce667262496a1306f93 (MD5) Previous issue date: 2015-02-11 / O desenvolvimento do processo de hidrogenação do dióxido de carbono em microrreator capilar abordado na presente pesquisa recorre a ação do catalisador de níquel suportado em alumina, disposto em reator de leito fixo. Atividade e estabilidade do sistema de níquel (25mg), foram avaliadas através de contato catalisador com uma mistura gasosa de composição em razões Molares de alimentação H2/CO2/Ar (33,4%/16,6%/50%), a uma vazão de 50mL/min, 80mL/min,100mL/min,120mL/min,140mL/min e 170mL/min, operando-se na faixa de temperatura de 298K,973K 1.023 K e 1.073 K, sob pressão de 1,0atm.Foram testados reações homogêneas e reações heterogêneas. O processo de hidrogenação do dióxido de carbono foi operado em reator de leito fixo, evidenciando uma importante conversão do dióxido de carbono com um rendimento em monóxido de carbono baixo. Em condições de reação homogênea observou-se que o melhor rendimento do monóxido de carbono foi de 76% nas condições de 1073K e vazão de 50mL/min. E o melhor conversão do dióxido de carbono foi de 76% na temperatura de 1073K e vazão de 50mL/min. Em condições de reação heterogênea observou-se que o maior rendimento de CO é nas condições de temperatura 973K e vazão de 80mL/min com um rendimento de 77%. E a melhor conversão do CO2 é nas condições de 50 mL/min e temperatura de 1073 K com uma conversão de 79%.Na temperatura de 973K a menor produção de Carbono foi na vazão de 100ml/min . Na temperatura de 1023 K a menor produção de carbono foi na vazão de 120mL/min e na condição de temperatura de 1073 K a menor produção de carbono foi na vazão de 170mL/min. Analisando a menor formação geral de carbono foi nas condições de temperatura de 1073K e 1023K nas vazões de 100mL/min e 120mL/min respectivamente.

Cette étude s’est focalisée sur la compréhension des mécanismes de déformation et d’endommagementd’un superalliage à base de Nickel (Udimet 720Li) utilisé pour la confection de disques de turbine hautepression soumis à des sollicitations monotones et cycliques à des températures inférieures à 500 °C.L’amorçage de fissures de fatigue à 20 °C et 465 °C a été systématiquement observé suivant des facettescristallographiques pour différents états métallurgiques. Une étude quantitative des traces de glissementplastique en surface a permis de montrer que cet endommagement est la conséquence d’une nontransmission de la déformation plastique entre grains voisins. Plus précisément, un mécanisme de rotationcristalline localisée au sein de micro-volumes à l’extrémité de bandes de glissement dans le grain voisin aété identifié à l’origine des fissures.Les configurations cristallographiques favorisant ce processus impliquent notamment les relations entresystèmes de glissement de part et d’autre du joint de grains (angle de TWIST), ou encore la présence d’uneprécipitation fine participant au confinement des bandes de glissement. / This study contributes to the understanding of the deformation and damage mechanisms in a Nickelbasedsuperalloy (the Udimet 720Li) used for the manufacturing of aeroengines high pressure turbinedisks submitted to monotonic and cyclic loadings at temperatures below 500 °C under service conditions.Fatigue crack initiation at 20 °C and 465 °C was systematically observed at large crystallographic facetswhatever the microstructure. An extensive quantitative study of the slip activity at the surface showed thatcrack initiation results from a difficult slip transmission between neighbouring grains. In more details, alocalized crystallographic rotation confined in micro-volumes detected at the tip of slip bands interactingwith the grain boundary were identified to trigger crack initiation.The crystallographic configurations favouring such a process are closely related to the TWIST anglebetween active slip systems on each side of the grain boundary and to a dense and fine precipitationconfining the plasticity.Mots-clés

Utilisés pour leur bon compromis entre propriétés mécaniques, thermiques et électriques, les alliages Cu-Ni-Si à durcissement structural par précipitation sont notamment employés pour la maintenance ferroviaire. Ils sont donc soumis aux passages des trains et aux effets d’environnement. C’est pourquoi la résistance d’un alliage CuNi2Si a été étudiée en fatigue oligocyclique, en corrosion aqueuse et en fatigue-corrosion. Le but est de relier les propriétés macroscopiques aux mécanismes microstructuraux. Les essais de fatigue ont montré un durcissement initial de l’alliage, suivi d’un adoucissement continu jusqu’à la rupture. À l’aide des microscopies électroniques en transmission (MET) et à balayage (MEB), notamment en ECCI (Electron Channeling Contrast Imaging) et en EBSD (Electron BackScattered Diffraction), une formation initiale de cellules de dislocations a été identifiée, ces dernières disparaissant au profil de la formation de bandes dénuées de précipités suite à la dissolution mécanique des précipités δ-Ni2Si. Ceci constitue le mécanisme d’accommodation de la déformation cyclique. L’avancée de la formation de ces bandes explique les différents régimes observés sur le diagramme de Manson-Coffin. L’alliage présente en milieu NaCl à 50 g.L1 un mécanisme de corrosion intergranulaire. La spectroscopie d’impédance électrochimique (SIE) semble indiquer la présente d’un film passif compact en surface de l’alliage. Enfin, une sensibilité à la fatigue-corrosion apparaît, notamment aux plus hauts niveaux de déformation où la durée de vie est réduite d’un tiers. De plus, un faciès de rupture semblable à ceux observés en corrosion sous contrainte est constaté. / Employed for their good balance between mechanical, thermal and electrical properties, precipitation hardened Cu-Ni-Si alloys are used for various purposes, including railway maintenance. In the latter case, they are submitted to train traffic and environmental effects. This is why the low cycle fatigue (LCF), the wet corrosion and the fatigue-corrosion behaviours of a CuNi2Si alloy have been studied. The aim of the present work is to relate the macroscopic properties to the microstructural behaviour. The fatigue life of the alloy is composed of an initial hardening step, followed by a continuous softening until fracture. Thanks to the combination of transmission and scanning electron microscopies (respectively TEM and SEM), including ECCI (Electron Channeling Contrast Imaging) in addition to EBSD (Electron BackScattered Diffraction), the formation of dislocation cells has been identified, which ones are then consumed by the formation of precipitate free bands after the mechanical dissolution of the δ-Ni2Si precipitates. This sequence describes the cyclic strain accommodation mechanism. The progress in the formation of these bands explains the different regimes observed into the Manson-Coffin diagram. The alloy exhibits intergranular corrosion in 50 g.L-1 NaCl solution. The electrochemical impedance spectroscopy (EIS) indicates the formation of a compact passive film at the surface of the alloy. Finally, the alloy seems to be sensible to fatigue-corrosion, especially at high strain range where the number of cycle to failure is reduced by a third. Moreover, a fracture surface similar to a stress corrosion cracking surface is also observed.

Ce travail s’inscrit dans une problématique industrielle relative à la fabrication d’échangeurs de chaleur utilisés dans les systèmes de conditionnement d’air sur avion. Ces échangeurs sont fabriqués à partir de tôles minces embouties en Ni 201, en Alliage 600 ou en AISI 444 brasées avec des tôles intercalaires et des barres de fermeture en Alliage 625. Le métal d’apport utilisé est la BNi-8, composé principalement de nickel, de manganèse, de silicium et de cuivre. Des défauts de brasage peuvent apparaître lors de la fabrication des faisceaux occasionnant un dysfonctionnement de l’échangeur. L’opération de brasage à l’échelle d’un échangeur implique un ensemble de phénomènes physiques couplés, liés au comportement thermomécanique de la structure alvéolaire, à l’hétérogénéité des conditions de brasage et à la métallurgie locale. Afin d’améliorer la compréhension des phénomènes liés au brasage, plusieurs axes d’études ont été entrepris. Dans un premier temps, le comportement du métal d’apport a été caractérisé avec l’étude des températures de fusion en fonction de la composition chimique, de la microstructure et des propriétés mécaniques associées. En parallèle, les métaux de base ont également été étudiés afin de connaître l’évolution de leur microstructure et donc des propriétés mécaniques en fonction de la température mais aussi de l’état des contraintes résiduelles présent dans le feuillard à l’issue de leur mise en forme par emboutissage. Une étude sur les tôles emboutis a également permis d’appréhender le comportement de ces produits minces en compression à chaud. Pour finir, afin de se rapprocher des conditions réelles de brasage en milieu industriel, des études ont été menées sur le couplage métal d’apport/métal de base d’un point de vue métallurgique mais aussi mécanique. L’ensemble de ces études a pour objectif de mieux appréhender les phénomènes mis en jeu pendant le cycle de brasage et de proposer des améliorations pour le procédé (géométrie des intercalaires, cycles thermiques, matériaux utilisés, etc.). / This work is devoted to improving the manufacturing process of heat exchangers used in aerospace applications. Heat exchangers included in air conditioning systems for aircraft are produced by brazing stamped thin alloys sheets made of nickel-based alloys, Alloy 600 and Ni 201, or stainless steel, AISI 444. Separation metal sheets and locking bars of Alloy 625 are used to complete the system. The used brazing filler metal BNi-8 is mainly composed of nickel, manganese, silicon and copper. However, brazing defects appear during the manufacture of theheat exchangers can lead to non-integrity of the components. In order to improve the understanding of the phenomena related to brazing, several axes of investigation have been considered. Firstly, the behavior of the brazing filler metal was characterized by studying the melting temperatures as a function of the composition, the microstructure and the associated mechanical properties. In parallel, the base metals were also studied in order to know the evolution of the microstructure and therefore the mechanical properties as a function of the temperature but also of the state of stress present in the metal sheet induced by the stamping. Studying of stamped thin alloys sheets also allowed to understand the behavior of these thin products in hot compression. Finally, in order to get closer to the actual brazing conditions in industrial environment, studies of the coupling of brazing filler metal/base metal from a metallurgical and mechanical point of view have been carried out. All of these studies pursue aim to better understand the phenomena involved during the brazing cycle and to propose improvements for the brazing process (geometry of stamped thin alloys sheets, thermal cycles, used materials, etc.).

When designing a Mechatronics system should be the management implemented into the mechanism of technological products. It is therefore necessary to create a connection tool for the management design and tools for the CAD of the management mechanism. The company responded that the need for the issuance of National Instruments toolkit to connect the NI LabVIEW with SolidWorks CAD tool. This link allows the NI LabVIEW environment to control the simulation on the virtual model in the SolidWorks/COSMOS Motion and back to obtain the results of dynamic analysis. The aim of this work is to evaluate the possibility of linking development tools and CAD system and evaluate its use in the design of Mechatronics system.