Key issues on the reactive sintering of ZrB2 ceramics from elementary raw materials

被引：22

作者：

Zou, Ji ^{[1
,2
]}

Ma, Hai-Bin ^{[3
]}

Chen, Lei ^{[4
]}

Wang, Yu-Jin ^{[4
]}

Zhang, Guo-Jun ^{[5
]}

机构：

[1] Univ Birmingham, Sch Met & Mat, Birmingham B15 2TT, W Midlands, England

[2] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[3] Chinese Nucl Power Technol Res Inst, Shenzhen 518026, Peoples R China

[4] Harbin Inst Technol, Key Lab Adv Struct Funct Integrat Mat & Green Mfg, Harbin 150001, Heilongjiang, Peoples R China

[5] Donghua Univ, Inst Funct Mat, State Key Lab Modificat Chem Fibers & Polymer Mat, Shanghai 201620, Peoples R China

来源：

SCRIPTA MATERIALIA | 2019年 / 164卷

基金：

中国国家自然科学基金; 英国工程与自然科学研究理事会;

关键词：

Borides; Sintering; Microstructure; Self-propagating high-temperature synthesis (SHS); COMBUSTION SYNTHESIS; MECHANICAL-PROPERTIES; COMPOSITES; ZIRCONIUM; POWDERS; DENSIFICATION;

D O I：

10.1016/j.scriptamat.2019.01.044

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Gas burst has been commonly observed during reactive sintering, especially when combustion was initialized therein. In this study, a model system (Zr + 2B = ZrB2) was chosen to investigate this phenomenon by a combination of thermo-analysis, mass spectrum investigation and electron microscopy studies. Results showed the combustion lead to a formation of various gaseous byproducts such as CO, CO2, N-2, BO, BO2 and B2O3 etc. Especially for BO(g), its generation consumed boron in the raw materials, resulting in the residual Zr-containing phase that accelerated the formation of interlocked ZrB2 grains in the sintered ceramics, which show relatively high strength (516 +/- 42 MPa). (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

引用

页码：105 / 109

页数：5

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