Accession Number : AD0262536

Title :   DIFFRACTION STUDIES OF CRYSTAL IMPERFECTIONS

Corporate Author : CHICAGO UNIV ILL INST FOR THE STUDY OF METALS

Personal Author(s) : WALKER,CHRISTOPHER B.

Report Date : 14 AUG 1961

Pagination or Media Count : 1

Abstract : Research on the following 5 reports is summarized: (1) The effect of temperature on local order diffuse scattering from alloys. I; (2) The effect of temperature on local order diffuse scattering from alloys. II. Alloys with atomic size effects; (3) Short-range order in Cu3Au; (4) Order in beta-AgCd; and (5) Solid solubility of Pb in Mg below 300 C. Problems considered during the report period included order-disorder transformations, lattice vibrations, point imperfections and diffraction theory. Research was incomplete on: (a) A neutron diffraction study of short range order in beta-brass; (b) Order in FeCo and FeCr alloys; (c) Temperature diffuse scattering in powders; and (d) Point defects in crystals. Measurements were made in the beta-brass study of the diffuse scattering of monochromatic thermal neutrons from single crystals of beta brass at temperatures above the critical temperature. Long range ordering in FeCo, Fe3Co and FeCr(b) was investigated by neutron diffraction.

Descriptors :   *CRYSTAL LATTICES, *CRYSTALS, *DIFFRACTION, *INTERMETALLIC COMPOUNDS, *METAL CRYSTALS, ALLOYS, CADMIUM COMPOUNDS, CHROMIUM COMPOUNDS, COBALT COMPOUNDS, COPPER COMPOUNDS, CRYSTAL STRUCTURE, GOLD COMPOUNDS, IRON COMPOUNDS, LEAD COMPOUNDS, MAGNESIUM COMPOUNDS, NEUTRON DIFFRACTION, PHASE STUDIES, SCATTERING, SILVER COMPOUNDS, SINGLE CRYSTALS, TEMPERATURE, X RAY DIFFRACTION

Distribution Statement : APPROVED FOR PUBLIC RELEASE