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Spherical monocrystals for X‐ray work obtained by plasma remelting of alloy powder
Author(s) -
Arnberg L.,
Westman S.
Publication year - 1978
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889878012923
Subject(s) - alloy , materials science , spheres , brittleness , grinding , argon , plasma , jet (fluid) , yield (engineering) , x ray , metallurgy , work (physics) , thermodynamics , chemistry , optics , physics , organic chemistry , quantum mechanics , astronomy
Spherical crystals of alloy phases too hard and brittle for grinding can be obtained by partial remelting and solidification of a powder sample. The alloy powder is blown through an argon‐plasma jet melting the surface material of individual fragments, which solidify again as nearly perfect spheres. The yield is a mixture of different materials in which it is possible, however, after heat treatment to find good single crystals of the original composition. Spherical single crystals of Cu 9 Al 4 have been produced by this method and used for a high‐precision X‐ray investigation described elsewhere.