Thesis (Ph. D.)--University of Pennsylvania, 1973. / Includes bibliographical references (leaves xliii-lxi).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1984. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (M.S.)--University of Wisconsin--Madison, 1983. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 184-187).

Thesis (M.S.)--University of Wisconsin--Madison, 1983. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 162-169).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1981. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (Ph. D.)--University of Wisconsin, 1965. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Thesis (M.S.)--University of Wisconsin--Madison, 1961. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 41-43).

The thermodynamic properties of the copper-manganese system were determined by the measurement of the vapour pressure of manganese tagged with Mn⁵⁴, using the Knudsen effusion method. Manganese shows a positive deviation from Raoult's law over the entire composition range. Copper, although showing a strong positive departure from Raoult's law at low copper content, shows a slight negative departure in copper-rich compositions. The negative departure, which can be associated with an affinity of copper for manganese is greatest at compositions of about 35% manganese. The behavior of both copper and manganese is much more ideal at lower manganese compositions. The ideal behaviour of the manganese in the alloys of low manganese content and the affinity of copper for manganese at about 35% manganese appear to corroborate Myers interpretation of the electronic configurations of copper and manganese in this system. / Applied Science, Faculty of / Materials Engineering, Department of / Graduate

An investigation was conducted of the corrosion of copper-gold alloys in ammonia solutions under oxygen pressure. The reaction, which took place in an autoclave, was followed by sampling and analysis of the solutions. It was found that only copper was dissolved from the alloys, the gold being left behind in a film on the surface of the corroding specimen. The reaction of pure copper as well as of four alloys ranging in gold content from 2 to 15 atomic percent were studied. Other variables examined include the concentrations of NH₃ and NH⁺₄ in the solution, the oxygen pressure and the temperature. It was found that while the rate curves for the dissolution of pure copper were linear, those for the alloys were generally parabolic in shape. The rate of dissolution of copper from the alloys appears to be determined by the transport of reactants and products through the gold rich films. Some copper oxide may also be precipitated in the pores of the film or in the region between the film and the underlying metal, further impeding the transport processes and contributing to the lowering of the rate. / Applied Science, Faculty of / Materials Engineering, Department of / Graduate

Inverse segregation has been studied in unidirectionally cast ingots as a function of alloy composition and casting conditions. Chill face segregation and the extent of segregation adjacent to the chill face has been examined in the Al-Cu and the Al-Ag systems, using radioactive copper (Cu64) and radioactive silver (Ag110) to measure the segregation. The results indicate that the observed segregation is markedly dependent on the alloy composition, melt superheat, thermal conductivity of the chill, temperature gradient in the casting, and other casting variables. The results obtained are compared to those reported in the literature for the Al-Cu alloys, and to the values predicted theoretically. / Science, Faculty of / Earth, Ocean and Atmospheric Sciences, Department of / Graduate