Superhard solid solutions of diamond and cubic boron nitride

Single-phase BC4N can be formed at high pressure and temperature, starting with either a mixture of diamond and cubic boron nitride or graphite and hexagonal boron nitride. The samples exhibit extreme Vickers hardness (85±4GPa), reaching the hardness of single crystal diamond. Within a random solid...

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Bibliographic Details
Published inScripta materialia Vol. 66; no. 10; pp. 781 - 784
Main Authors Tang, Mingjun, He, Duanwei, Wang, Wendan, Wang, Haikuo, Xu, Chao, Li, Fengjiao, Guan, Junwei
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.05.2012
Subjects
B–C–N
First-principles
HPHT sintering
Solid solutions
Superhard materials
HPHT sintering
Solid solutions
B–C–N
Superhard materials
First-principles
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Summary:Single-phase BC4N can be formed at high pressure and temperature, starting with either a mixture of diamond and cubic boron nitride or graphite and hexagonal boron nitride. The samples exhibit extreme Vickers hardness (85±4GPa), reaching the hardness of single crystal diamond. Within a random solid solution model, the X-ray diffraction patterns of cubic BCxN solid solutions were calculated. The results indicate that the prepared B–C–N materials are continuous solid solutions with a zinc-blende structure.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2012.02.006