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5 hcp结构复合碳化钽的力学性质

Table 5 Mechanical properties of complex tantalum carbides with hcp structure

Carbide (hcp)	G GPa	B GPa	E GPa	H_v GPa	G / B GPa	$ν$
Ta₂C (P $\bar{3}$ m1, this work)	149	255	374	16.9	0.583	0.26
Ta₂C (P $\bar{3}$ m1)^[34]	148.08	264.66		15.87
Ta_0.75Mo_0.25C	160	300	407	15.6	0.532	0.27
Ta_0.5Mo_0.5C	180	315	454	18.8	0.573	0.26
Ta_0.25Mo_0.75C	209	330	517	23.6	0.632	0.24
MoC	246	348	597	30.3	0.706	0.21
Ta_0.75W_0.25C	171	310	433	17.2	0.552	0.27
Ta_0.5W_0.5C	203	333	507	22.1	0.609	0.25
Ta_0.25W_0.75C	234	356	576	26.8	0.658	0.23
WC	282	385	681	34.7	0.732	0.21