Synthesis of high-purity polycrystalline MAX phases in Ti–Al–C system through Mechanically Activated Self-propagating High-temperature Synthesis

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• 作者：A. Hendaoui ; D. Vrel ; A. Amara ; P. Langlois ; M. Andasmas ; M. Guerioune
• 关键词：Powders-solid state reaction ; Electron microscopy ; X-ray methods ; Microstructure-final ; Carbides
• 刊名：Journal of the European Ceramic Society
• 出版年：2010
• 出版时间：March 2010
• 年：2010
• 卷：30
• 期：4
• 页码：1049-1057
• 全文大小：1141 K

文摘

Ternary MAX phase compounds were synthesized using an alternative route called MASHS (Mechanically Activated Self-propagating High-temperature Synthesis). This original process combines a short duration ball milling (MA) of reactants (Ti, Al, C) with a self-sustaining combustion (SHS). The particle size evolution of the powder mixture during Mechanical Activation was monitored using XRD profile analysis. The effect of Al-excess was also discussed. XRD and SEM analyses have proved that the activation of the reaction kinetics must be accompanied by a decrease in the overall exothermicity in order to synthesize pure Ti–Al–C MAX phases by MASHS.