Lattice expansions of two boron carbides between 12 and 940°C | Zendy

Yakel H. L. | Zendy

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Lattice expansions of two boron carbides between 12 and 940°C

Author(s) -

Yakel H. L.

Publication year - 1973

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/s0021889873009246

Subject(s) - thermal expansion , boron , boron carbide , isotropy , carbide , lattice (music) , lattice constant , chemical composition , materials science , diffraction , carbon fibers , analytical chemistry (journal) , chemistry , thermodynamics , metallurgy , physics , composite material , organic chemistry , quantum mechanics , composite number , acoustics , optics

High‐temperature X‐ray diffraction methods have been used to determine unit‐cell parameters of two boron carbide compositions from 12° to about 940°C. One composition was at the carbon‐rich end of the phase field ( i.e. B 4 C), the second at the boron‐rich end (5 at. % C by chemical analysis). The lattice expansion of both substances was isotropic in the temperature range studied. The mean linear thermal expansion coefficient for the carbon‐rich composition is 5.65 x 10 −6 °C −1 , while that of the boron‐rich composition is 5"87 x 10 −6 °C −1 .

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