Molten salt-assisted combustion synthesis and characterization of MoSi2 and MoSi2-Si3N4 composite powders

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作者：
Manukyan, Kh.V. [1 ,2 ]
Aydinyan, S.V. [1 ]
Kirakosyan, Kh.G. [1 ]
Kharatyan, S.L. [1 ,2 ]
Blugan, G. [3 ]
Müller, U. [4 ]
Kuebler, J. [3 ]
机构：
[1] Department of Inorganic Chemistry, Yerevan State University, A. Manukyan 1, Yerevan, AM-0025, Armenia
[2] Laboratory of Kinetics of SHS Processes, A.B. Nalbandyan Institute, Chemical Physics NAS of Armenia, P. Sevak 5/2, Yerevan, AM-0014, Armenia
[3] Laboratory of High Performance Ceramics, Empa, Swiss Federal Laboratories of Materials Testing and Research, Ueberlandstrasse 129, Duebendorf, CH-8600, Switzerland
[4] Laboratory of Nanoscale Materials Science, Empa, Swiss Federal Laboratories of Materials Testing and Research, Ueberlandstrasse 129, Duebendorf, CH-8600, Switzerland
来源：
Chemical Engineering Journal | 2008年 / 143卷 / 1-3期
关键词：
The possibilities of the synthesis of submicron MoSi2 and MoSi2-Si3N4 composite powders were investigated using inorganic salt-assisted combustion synthesis method. Combustion laws in the MoO3-3Mg-2Si-NaCl and Mo-5Si-NaCl-Si3N4-N2 systems were studied. The main factors influencing the combustion parameters; phase composition and microstructure of products for both these systems were determined experimentally. Optimum synthesis conditions of submicron MoSi2 and MoSi2-Si3N4 composite powders containing 30-40 wt.% of molybdenum disilicide were determined. Compacting conditions for 30 wt.% MoSi2-70 wt.% Si3N4 composite using the hot pressing technique were found. Compact samples 20 mm in diameter were obtained. Microstructure; phase and chemical compositions of the dense samples were studied. © 2008 Elsevier B.V. All rights reserved;
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页码：331 / 336
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