Accession Number : AD0284297

Title :   RESEARCH AND DEVELOPMENT FOR SINGLE CRYSTAL GROWTH BY ELECTROCHEMICAL TECHNIQUES

Corporate Author : AIR FORCE CAMBRIDGE RESEARCH LABS L G HANSCOM FIELD MASS

Personal Author(s) : LIGHTY,P.E. ; SHANEFIELD,D.

Report Date : JUL 1962

Pagination or Media Count : 1

Abstract : The purpose of this work is to investigate techniques of single-crystal growth by electrodeposition. The crystal structure was investigated with etch pit and sensitive X-ray techniques. Divergent beam, Berg-Barrett, and Laue methods were used. New methods were developed for purifying the plating baths and for smoothing the specimen surfaces. It was found that an epitaxial Cu crystal could be produced with a degree of perfection higher than that of the Cu substrate. Where the substrate was highly imperfect, specific imperfections caused polycrystallinity in the electrodeposit. It was shown that an interaction of dislocations and impurities causes the polycrystallinity. An explanation of these facts is proposed. (Author)

Descriptors :   *ELECTRODEPOSITION, *SINGLE CRYSTALS, COPPER, CRYSTAL STRUCTURE, CRYSTALS, ELECTROCHEMISTRY, METAL CRYSTALS, PURIFICATION, REFLECTION, X RAY DIFFRACTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE