Effect of Mo-Si-B on Sintering Process and Properties of ZrB2 Ultra-high-Temperature Ceramics

被引：0

作者：

Zhao X. ^{[1
]}

Li Z. ^{[1
]}

Lu X. ^{[1
]}

Shao G. ^{[1
]}

Ma S. ^{[1
]}

Wang H. ^{[1
]}

Zhang R. ^{[2
]}

机构：

[1] School of Materials Science and Engineering, Zhengzhou University, Zhengzhou

[2] Zhengzhou University of Aeronautics, Zhengzhou

来源：

Kuei Suan Jen Hsueh Pao/Journal of the Chinese Ceramic Society | 2018年 / 46卷 / 03期

关键词：

Hot pressing; Molybdenum silicon boride; Oxidation resistance; Zirconium diboride;

D O I：

10.14062/j.issn.0454-5648.2018.03.11

中图分类号：

学科分类号：

摘要：

Mo, Si and B powders were used as second phase aids to improve the fracture toughness and the oxidation resistance of ZrB2 ceramic. The dense ZrB2-Mo-Si-B ceramic composites were fabricated via hot pressing at 20 MPa and 1 900 ℃ for 1 h due to the in-situ reaction between Mo-Si-B. The flexural strength and fracture toughness of the sintered samples firstly increase, then decrease and further increase with the amount of Mo-Si-B increasing. ZrB2-20% (volume fraction) Mo-Si-B composite has the maximum fracture toughness of (5.55±0.11) MPa·m1/2. ZrB2-30%Mo-Si-B composite has the maximum bending strength of (500±40) MPa. All the sintered samples show a good oxidation resistance due to the glassy phase formed on the surface of composites, preventing the inner-transformation of oxidation. © 2018, Editorial Department of Journal of the Chinese Ceramic Society. All right reserved.

引用

页码：382 / 387

页数：5

共 17 条

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