Formation Mechanism of Ternary Carbide Ti3AlC2 by Combustion Synthesis

Journal of Inorganic Materials

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Formation Mechanism of Ternary Carbide Ti₃AlC₂ by Combustion Synthesis

GE Zhen-Bin¹; CHEN Ke-Xin¹; GUO Jun-Ming^1,2; ZHOU He-Ping¹; NING Xiao-Shan¹

1.Department of Material Science & Engineering; The State Key Lab of New Ceramics & Fine Processing; Tsinghua University; Beijing 100084; China; 2.Department of Chemistry; Mengzi Teachers College; Yunnan Mengzi 661100; China

Received:2002-02-01 Revised:2002-03-19 Published:2003-03-20 Online:2003-03-20

Abstract

Abstract: The formation mechanism of Ti₃AlC₂ powders by the combustion synthesis was investigated by analyzing the microstructure and phase content of the quenched sample. The results show that the mechanism of the reaction is a solution- precipitation mechanism: at first previously formed TiC particles dissolve in the Ti-Al melt, followed by the precipitation of ternary phase Ti₃AlC₂ that will grow into a layered morphology. The model of combustion synthesis of Ti₃AlC₂ can be divided into four stages: unreacted stage, preheating and initial reacting stage, dissolution and precipitation stage, completely reacted stage.

Key words: Ti₃AlC₂, mechanism, combustion synthesis, powders

CLC Number:

TM286

GE Zhen-Bin,CHEN Ke-Xin,GUO Jun-Ming,ZHOU He-Ping,NING Xiao-Shan. Formation Mechanism of Ternary Carbide Ti₃AlC₂ by Combustion Synthesis[J]. Journal of Inorganic Materials.

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Formation Mechanism of Ternary Carbide Ti₃AlC₂ by Combustion Synthesis

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