Ti₃Si(Al)C₂-based ceramics fabricated by reactive melt infiltration with Al₇₀Si₃₀ alloy

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• 作者：Lei Wang ; Xiaowei Yin ; Xiaomeng Fan ; Peter Greil ; Nahum Travitzky
• 关键词：Reactive melt infiltration ; Al-Si alloy ; Ti3Si(Al)C2
• 刊名：Journal of the European Ceramic Society
• 出版年：June, 2014
• 年：2014
• 卷：34
• 期：6
• 页码：1493-1499
• 全文大小：2953 K

文摘

Dense Ti₃Si(Al)C₂-based ceramics were synthesized using reactive melt infiltration (RMI) of Al₇₀Si₃₀ alloy into the porous TiC preforms. The effects of the infiltration temperature on the microstructure and mechanical properties of the synthesized composites were investigated. All the composites infiltrated at different temperatures were composed of Ti₃Si(Al)C₂, TiC, SiC, Ti(Al, Si)₃ and Al. With the increase of infiltration temperature from 1050 掳C to 1500 掳C, the Ti₃Si(Al)C₂ content increased to 52 vol.% and the TiC content decreased to 15 vol.%, and the Vickers hardness, flexural strength and fracture toughness of Ti₃Si(Al)C₂-based composite reached to 9.95 GPa, 328 MPa and 4.8 MPa m^1/2, respectively.