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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 17    No. 5    October 2007

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Synthesis of Ti2AlC by hot pressing andits mechanical and electrical properties
WANG Ping(王 苹)1, 2, MEI Bing-chu(梅炳初)2, HONG Xiao-lin(洪小林)2, ZHOU Wei-bing(周卫兵)2

1. School of Science, Wuhan University of Technology, Wuhan 430070, China; 2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China

Abstract:Ti2AlC bulk material was synthesized by hot pressing of mixture powders of TiC, Ti, Al and active carbon. The phase compositions of resultant product at different temperature were detected by X-ray diffractometer. The microstructures of the samples were observed by SEM. Finally, the mechanical properties and thermal properties of the sample at 1 400 ℃ were measured. The results show that high purity Ti2AlC material with little Ti3AlC2 can be synthesized by hot pressing 0.5TiC/1.5Ti/1.0Al/0.5C at 1 400 ℃. Ti2AlC exhibits high mechanical properties and metallic electrical properties. Its fracture toughness is 7.0 MPa∙m1/2, its flexural strength is 384 MPa at room temperature, and its electrical conductivity is 2.56×106 Ω−1∙m−1 at room temperature.

 

Key words: hot pressing; Ti2AlC; mechanical properties; electrical properties

ISSN 1672-7029
CN 43-1423/U

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