Microstructure, mechanical properties, and thermal stability of γ-Nb5Si3 under high temperature and high pressure

被引：3

作者：

Wang, Juwei ^{[1
]}

Chen, Haihua ^{[1
]}

Zhang, Zhengang ^{[1
,2
]}

Wang, Bin ^{[1
]}

Ma, Hongtao ^{[1
]}

Song, Minqing ^{[1
]}

Zhai, Jinhui ^{[1
]}

Ding, Lanfang ^{[1
]}

机构：

[1] Qinghai Univ, Dept Basic Educ, Xining 810016, Peoples R China

[2] Sichuan Univ, Inst Atom & Mol Phys, Chengdu 610065, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2021年 / 130卷 / 13期

基金：

中国国家自然科学基金;

关键词：

IN-SITU COMPOSITES; FRACTURE-TOUGHNESS; PHYSICAL-PROPERTIES; AB-INITIO; HARDNESS; STRESS; CARBON; MO;

D O I：

10.1063/5.0067267

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The study of the effect of pressure and temperature on the structural and mechanical properties of materials is very difficult for current experimental techniques. Here, we have synthesized the gamma-Nb5Si3 compound with remarkable quality by high pressure and high temperature (HPHT) technology. The effects of high pressure and sintering temperature on its microstructure, mechanical properties, and oxidation resistance are discussed. The Vickers hardness and density of the gamma-Nb5Si3 sample at 5.5 GPa and 1100 & DEG;C are 8.67 GPa and 5.73 g/cm(3), respectively. It is shown that the HPHT behavior not only improves sample's compactness and microstructure, but also makes gamma-Nb5Si3 to have a strong response to the Vickers hardness and related density. These results effectively demonstrate the functions of the HPHT technology, which accurately express the Vickers hardness, density, and thermal stability of gamma-Nb5Si3 compounds.

引用

页数：8

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