High pressure phase stability, mechanical and optical properties of Ti4SiC3 compound: ab initio study

High pressure phase stability, mechanical and optical properties of Ti4SiC3 compound: ab initio study
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Ti4SiC3 化合物的高压相稳定性、机械和光学性能:从头开始研究

DOI:
10.1140/epjb/e2014-50358-y
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发表时间:
2014-10
期刊:
THE EUROPEAN PHYSICAL JOURNAL B
影响因子:
--
通讯作者:
Wang Tianxing
Wang Tianxing
中科院分区:
其他
文献类型:
--
作者:
Jiao Zhaoyong;Ma Shuhong;Wang Tianxing

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摘要 采用从头计算方法研究了块状三元层状碳化物Ti4SiC3化合物的高压相稳定性和物理性质。目前的结果表明,该化合物的热力学稳定性和弹性稳定性可以保持高达约200 GPa。该陶瓷具有较高的德拜温度(849.7K),是一种准脆性陶瓷,具有良好的导热性能。光学性能分析表明,Ti_4SiC_3可作为紫外波段的良好涂层材料。这些发现确定了Ti4SiC3化合物作为具有优异的机械、陶瓷和弹性各向同性性能的材料,用于未来的应用。
Abstract High pressure phase stability and physical properties of bulk ternary-layered carbide Ti4SiC3 compound are studied through ab initio calculations. Present results indicate that the thermodynamic stability and elastic stability can be maintained up to about 200 GPa for this compound. And it is predicted to be a quasi-brittle ceramic and possesses good thermal conductivity due to a relative high Debye temperature (849.7 K). Moreover, the analysis of optical properties suggests that Ti4SiC3can be used as good coating materials in the ultraviolet region. These findings identify the compound of Ti4SiC3 as a material with excellent mechanical, ceramic and elastic isotropic properties for future applications.
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