LPMTM-CNRS, Institut Galilée, Université Paris Nord, 99, av. J.B. Clément, 93430 Villetaneuse, France.
J Phys Chem B. 2010 May 6;114(17):5819-22. doi: 10.1021/jp100851y.
The chemical interaction and phase relations in the B-BN system have been in situ studied at 5 GPa and temperatures up to 2800 K using X-ray diffraction with synchrotron radiation. The thermodynamic analysis of the B-BN system based on experimental data allowed us to construct equilibrium and metastable phase diagrams of the system at 5 GPa. The only thermodynamically stable boron subnitride, B(13)N(2), melts incongruently at 2600 K and forms eutectic equilibrium with boron at 2300 K and 4 at. % of nitrogen.
采用同步辐射 X 射线衍射技术在 5 GPa 和高达 2800 K 的温度下对 B-BN 体系中的化学相互作用和相平衡进行了原位研究。基于实验数据对 B-BN 体系的热力学分析使我们能够在 5 GPa 下构建该体系的平衡和亚稳相图。唯一热力学稳定的硼亚氮化物 B(13)N(2)在 2600 K 下不连续熔化，并在 2300 K 和 4 at.%氮下与硼形成共晶平衡。
