Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第12卷    第1期    总第46期    2002年2月

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文章编号:1004-0609(2002)01-0031-05
1200℃ Mo-Si-C三元系组元化学势稳定性相图
甘国友,孙加林,陈敬超,陈永翀,严继康

(昆明理工大学 材料与冶金工程学院,昆明 650093)

摘 要: 收集并计算了Mo-Si-C三元系在1200℃下各组元化合物的热力学数据。利用Mo-Si-C三元系在该温度下的平衡相图以及收集计算的热力学数据,计算了该三元系中各组元的化学势,并作出了相应的化学势稳定性相图。讨论了热力学、物质平衡和动力学原则在固态置换反应原位合成复合材料中的应用。对于MoSi2-SiC复合材料的原位合成,可以确定反应起始物为Mo2C和Si。利用Mo-Si-C三元系1200℃下的平衡相图和组元化学势稳定性相图分析了固态置换反应原位合成MoSi2-SiC复合材料可能的反应路径。

 

关键字: Mo-Si-C三元系;平衡相图;化学势;化学势稳定性相图

Stabilized chemical potential 
diagrams for Mo-Si-C ternary 
system at 1200℃
GAN Guo-you,SUN Jia-lin,CHEN Jing-chao,
CHEN Yong-chong,YAN Ji-kang

School of Materials and Metallurgy Engineering,
Kunming University of Science and Technology,
Kunming 650093,China

Abstract:The thermodynamic data of Mo-Si-C ternary sys tem were collected and calculated. The equilibrium phase diagram of Mo-Si-C ternary system at 1200℃ and the estimated thermodynamic data of intermetallic compounds were utiliz ed to calculate stabilized chemical potential and to draw the stabilized chemical potential diagrams of Mo-Si-C ternary system. The applications of the principles of thermodynamics,mass balance and kinetics to the synthesis of in situ composites through solid-state displacement reactions has been discussed. Applying these principles to the synthesis of in situ MoSi2-SiC composites,it is shown that the proper starting reaction materials are Mo2C and Si. The use of equilibrium phase diagram and stabilized chemical potential diagrams of Mo-Si-C ternary system at 1200℃ for analyzing reaction paths of the synthesis of in situ MoSi2-SiC composites through solid-state displacement reactions is demonstrated.

 

Key words: Mo-Si-C ternary system;equilibrium phase diagram; chemical potential;stabilized chemical potential diagram

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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