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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
101

The machining of annealed and hardened steels using advanced ceramic cutting tools

Abrão, Alexandre Mendes January 1995 (has links)
No description available.
102

Plasma nitriding of 2011 aluminium alloy /

Gredelj, Sabina. Unknown Date (has links)
Thesis (PhD)--University of South Australia, 2002.
103

Correlating structural and optical properties of silicon nanocrystals embedded in silicon nitride: An experimental study of quantum confinement for photovoltaic applications

Scardera, Giuseppe, ARC Centre of Excellence in Advanced Silicon Photovoltaics & Photonics, Faculty of Engineering, UNSW January 2008 (has links)
Silicon nanocrystals embedded in silicon nitride have received attention as promising materials for optoelectronic applications. More specifically, band gap engineering of novel materials based on silicon nanocrystals has been proposed for possible application in an all-silicon tandem solar cell within the field of `third generation' photovoltaics. Such an application would require nanocrystals to exhibit quantum confinement whereby the optical and electrical properties of a film could be tuned by controlling the size of these `quantum dots'. This thesis investigates the correlation between the structural and optical properties of silicon nanocrystals grown in silicon nitride multilayer structures via solid phase crystallisation, as part of an experimental investigation into quantum confinement. A study of the relevant processing parameters for the solid phase crystallization of silicon nanocrystals in amorphous silicon nitride is presented and the effectiveness of the multilayer approach for controlling nanocrystal size is demonstrated. Structural characterisation using transmission electron microscopy and glancing incidence x-ray diffraction is complemented with a new application of Fourier transform infrared spectroscopy for the detection of silicon nanocrystals. A case study on the effects of annealing temperature on the photoluminescence from silicon nitride multilayers is presented. While a clear correlation between the structural, molecular and optical properties is demonstrated, evidence of quantum confinement remains ambiguous. The investigation into the limits of parameter space for the formation of silicon nanocrystals in silicon nitride multilayers also leads to the formation of a novel Si-Si3N4 nanocomposite material. A comprehensive study of the photoluminescence from silicon nanocrystals embedded in nitride is presented in the context of homogeneous and multilayer nitride films. Size dependent PL and absorption is demonstrated for silicon nitride multilayers with silicon-rich silicon nitride layer thicknesses varying from 1 to 4.5 nm, indicating the formation of quantum wells. These same structures are annealed to form arrays of silicon nanocrystals. Although the PL and absorption spectra suggest quantum effects, inherent ambiguities remain. The findings in this thesis provide greater insight into the nature of confinement and indicate the need for further research if the successful implementation of these structures into an all silicon tandem cell is to be achieved.
104

Growth of gallium nitride on silicon substrate using the interlayer growth technique

Al-Tamimi, Mohammed A. January 2001 (has links)
Thesis (M.S.)--Ohio University, August, 2001. / Title from PDF t.p.
105

Dependence of piezoelectric response in gallium nitride films on silicon substrate type

Willis, Jim. January 1999 (has links)
Thesis (M.S.)--Ohio University, November, 1999. / Title from PDF t.p.
106

Ion-beam processes in group-III nitrides /

Kucheyev, Sergei Olegovich. January 2002 (has links)
Thesis (Ph.D.)--Australian National University, 2002.
107

Subnitride im System Alkalimetall-Barium-Stickstoff

Smetana, Volodymyr, January 2008 (has links)
Stuttgart, Univ., Diss., 2008.
108

Untersuchungen zur Ladungsträgerstreuung zwischen Quantenpunkten und niederdimensionalen Barrieren in Gruppe-III-Nitriden

Gröning, Albert January 2008 (has links)
Zugl.: Stuttgart, Univ., Diss., 2006
109

Discrete element modelling of silicon nitride ceramics crack formation and propagation in indentation test and four point bending test /

Senapati, Rajeev. January 2009 (has links)
Thesis (M.S.)--University of Texas at El Paso, 2009. / Title from title screen. Vita. CD-ROM. Includes bibliographical references. Also available online.
110

Laser spectroscopy of sulphur monoxide and titanium nitride /

Wong, Tai-wai. January 1992 (has links)
Thesis (M. Phil.)--University of Hong Kong, 1992.

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