钽合金表面渗碳层中碳化物析出及其性能的第一性原理研究

孟祥龙, 刘瑞良, Li D. Y.

First Principles Study on the Precipitation and Properties of Carbides in the Surface Carburized Layer of Tantalum Alloys

MENG Xianglong, LIU Ruiliang, Li D. Y.

表4 hcp结构复合碳化钽的弹性常数 (GPa)

Table 4 Elastic constants of complex tantalum carbides with hcp structure

Carbide (hcp)	C₁₁	C₁₂	C₁₃	C₃₃	C₄₄
Ta₂C (P $\bar{3}$ m1, this work)	480	143	138	498	120
Ta₂C (P $\bar{3}$ m1)^[34]	479	164	149	504	133
Ta_0.75Mo_0.25C	511	194	138	764	120
Ta_0.5Mo_0.5C	532	203	151	783	157
Ta_0.25Mo_0.75C	568	206	159	811	203
MoC	618	213	159	854	263
Ta_0.75W_0.25C	537	197	138	787	130
Ta_0.5W_0.5C	581	209	154	823	181
Ta_0.25W_0.75C	621	224	164	878	235
WC	699	232	167	953	302