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Reaction Synthesis and Pressureless Sintering of Cr2AlC Powder

This work was aimed to produce Cr2AlC powder through two-step reactions and to sinter it under a pressureless condition, and the related synthesis and sintering mechanisms were evaluated. Cr2AlC powder of [sim]9 [mu]m in size was produced using CrCx and Al powders and sintered to a relative density of [sim]95.5%. The sintering was characterized by an activation energy of 267±23 kJ/mol and the mixed mode of sintering comprised of the surface diffusion mechanism and the transient liquid-phase sintering caused by melting of Al[ndash]Cr intermetallic impurities. The sintered sample exhibited Vickers hardness of 3.4 GPa.

Authors:   Panigrahi, Bharat Bhooshan; Chu, Min‐Cheol; Kim, Yong‐Il; Cho, Seong‐Jai; Gracio, Jose J.
Journal:   Journal of the American Ceramic Society
Volume:   93
edition:   6
Year:   2010
Pages:   1530
DOI:   10.1111/j.1551-2916.2009.03560.x
Publication date:   01-Jun-2010
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