Effects of boron addition on the formation of MoSi2 by combustion synthesis mode

被引：14

作者：

Feng, Peizhong ^{[1
,2
]}

Wu, Jie ^{[1
]}

Islam, S. H. ^{[3
]}

Liu, Weisheng ^{[1
]}

Niu, Jinan ^{[1
]}

Wang, Xiaohong ^{[1
]}

Qiang, Yinghuai ^{[1
]}

机构：

[1] China Univ Min & Technol, Sch Mat Sci & Engn, Xuzhou 221116, Peoples R China

[2] China Univ Min & Technol, Sch Chem Engn & Technol, Xuzhou 221116, Peoples R China

[3] NED Univ Engn & Technol, Dept Met Engn, Karachi 75270, Pakistan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2010年 / 494卷 / 1-2期

关键词：

Molybdenum disilicide; Combustion synthesis; XRD; TEMPERATURE STRUCTURAL SILICIDES; SI-B ALLOY; MECHANICAL-PROPERTIES; SINGLE-CRYSTALS; MOLYBDENUM DISILICIDE; MICROSTRUCTURE; COMPOSITES;

D O I：

10.1016/j.jallcom.2010.01.080

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The combustion synthesis behavior of Mo-Si-B powder was investigated. Test specimens with nominal compositions including MoSi2, Mo(Si0.975B0.025)(2), Mo(Si0.95B0.05)(2), Mo(Si0.925B0.075)(2) and Mo(Si0.9B0.1)(2) were employed. The combustion mode, propagation velocity of combustion wave, combustion temperature and combustion product structure were studied. The results showed that the combustion wave propagated along a spiral trajectory till reaching the bottom of the compacts. The combustion temperature was increased by the addition of boron, to as high as 1922 K in the case of the Mo(Si0.95B0.05)(2) sample. However, the flame-front propagation velocity decreased as a result of the addition of boron. The X-ray diffraction results showed that the combustion products of the Mo(Si0.975B0.525)(2) and Mo(Si0.9B0.1)(2) samples were composed of MoSi2 with minor MoB. Those of the Mo(Si0.95B0.05)(2) and Mo(Si0.925B0.075)(2) samples were composed of MoSi2 with minor MoB and MoB2. And traces of Mo2B5 were identified in the Mo(Si0.95B0.05)(2) sample. (c) 2010 Elsevier B.V. All rights reserved.

引用

页码：161 / 165

页数：5

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