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3 fcc结构复合碳化钽的弹性常数和力学性质

Table 3 Elastic constants and mechanical properties of complex tantalum carbides with fcc structure

Carbide (fcc)	C₁₁ ( $\bar{C}$ ₁₁) GPa	C₁₂ ( $\bar{C}$ ₁₂) GPa	C₄₄ ( $\bar{C}$ ₄₄) GPa	G GPa	B GPa	E GPa	H_V GPa	G / B	$ν$
TaC, this work	720	134	154	200	330	500	21.8	0.607	0.25
TaC^[34]	737	141	175	216.90	339.67		24.53
Ta_0.75Mo_0.25C	668	138	152	167	302	423	20.9	0.605	0.25
Ta_0.5Mo_0.5C	576	165	146	151	310	389	17.0	0.554	0.27
Ta_0.25Mo_0.75C	581	174	123	122	339	327	13.2	0.486	0.29
MoC	684	166	70	200	331	499	7.0	0.360	0.34
Ta_0.75W_0.25C	715	139	156	179	310	450	21.5	0.603	0.25
Ta_0.5W_0.5C	630	150	147	156	341	407	18.8	0.577	0.26
Ta_0.25W_0.75C	611	207	132	129	370	346	12.4	0.458	0.30
WC	769	170	67	200	330	500	7.0	0.348	0.34