Superhard boron-rich borides and studies of the B C N system

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 209; no. 1; pp. 16 - 22
• Main Authors: Lundstro¨m, Torsten, Andreev, Yuri G.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 1996; Elsevier
• Subjects: B [sbnd]C [sbnd]N system; Borides; Ceramics and refractories (including borides, carbides, hydrides, nitrides, oxides, and silicides); Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Materials synthesis; materials processing; Physics; B C N system; Borides; Reaction sintering; Boron nitrides; Boron sulfides; Hard materials; Boron oxides; Experimental study; Boron carbides; Crystal structure
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/0921-5093(95)10095-4

The crystal chemistry of the B
4C-type structures is described. New structural data for B
12S, B
13Se and B
6O are presented. It is found that B
6O with a microhardness larger than that of B
4C invariably contains a high concentration of vacancies at the oxygen position (B
6O
1-
x
with
x in the range 0.76–0.84). Structural results for graphite-like phases in the B-C-N system are presented and discussed.