Comparative study of combustion laws for Mo-Si-N and W-Si-N ternary systems

被引：7
|
作者：
Gabrielyan, Armine V. [1 ]
Manukyan, Khachatur V. [1 ]
Kharatyan, Suren L. [1 ,2 ]
机构：
[1] Yerevan State Univ, Dept Chem Phys, Yerevan, Armenia
[2] A Nalbandyan Inst Chem Phys NAS Armenia, Lab Kinet SHS Proc, Yerevan, Armenia
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2008年 / 454卷 / 1-2期
关键词：
gas-solid reactions (preparation and processing); high-temperature alloys (phemomena); metals (types of material); chemical synthesis (preparation and processing);
D O I：
10.1016/j.jallcom.2006.12.116
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：
Combustion laws in the Mo-Si-N and W-Si-N systems were studied. Thermodynamic analyses performed for these systems have shown that within certain intervals of parameters (the Si/Me ratio, nitrogen pressure, etc.), two-phase products consisting of MoSi2(WSi2) and Si3N4 are formed. Main factors influencing the combustion parameters, as well as phase composition and microstructure of products for both the systems considered were established experimentally. The leading stages of the combustion process in Mo(W)-Si-N systems (nitriding of silicon and/or siliconizing of the metal) de ending on experimental conditions were revealed. Optimum conditions for synthesizing MoSi2-Si3N4 Particulate composite containing 10 wt.% of silicon nitride were determined. (C) 2007 Elsevier B.V. All fights reserved.
引用
收藏
页码：394 / 399
页数：6
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