Masters Theses

Abstract

"The lattice constant of pure aluminum (99.998%) at 25° C 0 was determined to be 4.04953 A and the limit of solubility of gold in aluminum at 58O° c was found to be about o.4 weight percent gold. The minimum of the lattice constant was observed at O.75 weight percent gold. No change in the lattice constant with time was found.

The Al2Au phase has a range from 77.66 to 78.94 weight percent gold with the theoretical composition of Al2Au nearly in the middle of the phase. The thermal coefficient of expansion, the density and the actual number of molecules per unit cell were determined for Al2Au. The same study was made with a large sample of Al2Au, obtained from the Texas Instrument Co., Texas. No ordering effects were found with an Al2Au sample at 3OO° c and 5OO° c.

A microscopic study of Al2Au samples revealed the presence of small amounts of another phase beyond the extent of the Al2Au phase.

An attempt to prepare a sample of a single A1Au2 phase was not very successful, although powder patterns with very many lines present were obtained pointing toward a low symmetry lattice"--Abstract, p. ii

Advisor(s)

Martin E. Straumanis

Committee Member(s)

William Joseph James
Robert E. Moore
Robert V. Wolf

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Metallurgical Engineering

Publisher

Missouri School of Mines and Metallurgy

Publication Date

1963

Pagination

vii, 90 pages

Note about bibliography

Includes bibliographical references

Rights

© 1963 Kuldip Singh Chopra, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 1485

Print OCLC #

5950834

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Metallurgy Commons

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