Formation mechanism of Ti₅Si₃ powder by mechanical alloying

Pengchao Kang, Zhongda Yin, Yue Jiang, Mingwei Li Materials Science and Engineering School, Harbin Institute of Technology, Harbin 150001, China College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China

摘 要：<正> The formation mechanism of stoichiometry Ti5Si3 by mechanical alloying （MA） from elemental powders has been investigated. The results of XRD and SEM analyses of the powder show that Ti5Si3 can be synthesized by MA in a planetary mill with two different formation mechanisms. Ti5Si3 was formed gradually with the mechanical collusion reaction （MCR） mechanism under a lower impact energy, and the Ti5Si3 was formed abruptly with the self-propagating high-temperature synthesis （SHS） formation mechanism under a higher impact energy.

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