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Lattice Constants of Boron Carbides
Author(s) -
Aselage Terry L.,
Tissot Ralph G.
Publication year - 1992
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1992.tb04485.x
Subject(s) - lattice constant , boron , carbide , boron carbide , materials science , solid solution , carbon fibers , lattice (music) , diffraction , powder diffraction , analytical chemistry (journal) , crystallography , thermodynamics , chemistry , metallurgy , physics , composite material , organic chemistry , composite number , acoustics , optics
The lattice constants of boron carbides have been determined by powder X‐ray diffraction for samples with compositions between about 7.7 and 20.5 at.% carbon. The boundaries of the single‐phase region are at about 9 at.% carbon and near, but likely somewhat less than, 20 at.% carbon. The composition dependence of the lattice constants thus established provides a method of assessing the carbon concentration of unknown materials. In particular, assignment of the approximate composition of single crystals used in previous studies allows for a systematic examination of changes in interatomic separation as a function of composition. These changes are discussed in terms of a structural model of the boron carbide solid solution.