Mechanism of Self-Propagating High-Temperature Synthesis of MoSi2

摘要：

　　The reaction mechanism of self-propagating high-temperature synthesis of MoSi2 was investigated by means various methods.The result of activation energy calculation indicates that the synthesis reaction is controlled by a single mechanism.Analysis on the microstructure of Mo/MoSi2 and Si/MoSi2 interfaces reveals that Mo reacts with Si to directly form MoSi2 without any transient product(s).Morphology comparison between the reactants and the product demonstrates that the reaction mechanism is not reactive diffusion.Microstructural observation on the materials from quenched zone shows MoSi2 particles precipitate from liquid phase.A mechanism may be proposed based on the above results: Mo particles are covered by molten Si and dissolve into the melt,and then MoSi2 particles precipitate from the melt due to super saturation.

关键词： Activation Energy Interface Morphology Quenching Reaction Mechanism

作者: Jianying Gao Lianjun Wang Wan Jiang

作者单位: State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University, 2999 People of North Road, Shanghai 201620, China

会议类型: 国际会议

会议名称: the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))

会议地点: 太原

会议语种:英文

页码: 587-593

在线出版日期: 2012-07-13（万方平台首次上网日期，不代表论文的发表时间）