Solozhenko Vladimir L, Kurakevych Oleksandr O, Andrault Denis, Le Godec Yann, Mezouar Mohamed
LPMTM-CNRS, Université Paris Nord, F-93430 Villetaneuse, France.
Phys Rev Lett. 2009 Jan 9;102(1):015506. doi: 10.1103/PhysRevLett.102.015506.
Here, we report the synthesis of cubic BC5 (c-BC5), the diamondlike B-C phase with the highest boron content ever achieved, at 24 GPa and about 2200 K, using both a laser-heated diamond anvil cell and large-volume multianvil apparatus. The synthesized phase is low compressible (bulk modulus of 335 GPa), conductive, and exhibits extreme Vickers hardness (71 GPa), unusually high for superhard materials fracture toughness (9.5 MPa m;{0.5}), and high thermal stability (up to 1900 K); this makes it an exceptional superabrasive and promising material for high-temperature electronics.
在此，我们报告了立方BC5（c-BC5）的合成，这是一种类金刚石B-C相，其硼含量达到了有史以来的最高值。我们使用激光加热金刚石对顶砧装置和大体积多砧装置，在24吉帕和大约2200开尔文的条件下合成了该相。合成的相具有低压缩性（体模量为335吉帕）、导电性，并表现出极高的维氏硬度（71吉帕），对于超硬材料而言其断裂韧性异常高（9.5兆帕·米0.5），且具有高热稳定性（高达1900开尔文）；这使其成为一种卓越的超级磨料以及用于高温电子学的有前景的材料。
