Lattice Constants of Boron Carbides
Release time:
2018-08-02
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.
