Phase transformation and growth of rod-like α-SiAlON particles during combustion synthesis
Phase transformation and growth of rod-like α-SiAlON particles during combustion synthesis
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DOI：
10.1016/j.matlet.2005.11.024
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发表时间：
2006-05
影响因子：
3
通讯作者：
Guanghua Liu;Kexin Chen;Heping Zhou;C. Pereira;J. Ferreira
中科院分区：
文献类型：
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作者：
Guanghua Liu;Kexin Chen;Heping Zhou;C. Pereira;J. Ferreira
采用燃烧合成法制备了钇和镱稳定的棒状α-SiAlON粉末。采用淬火法研究了燃烧合成α-SiAlON过程中的相形成和组织演变。提出了α-SiAlON形成的3个反应阶段：金属粉末的氮化、共存液相的形成和氮化物溶解析出α-SiAlON。观察到棒状α-SiAlON晶体的不同成核和生长模式：从液相中结晶，或在原始大晶体表面成核和生长。
Yttrium- and ytterbium-stabilized α-SiAlON powders consisting of rod-like microcrystals were prepared by combustion synthesis. A quenching method was used to investigate the phase formation and microstructure evolution during the combustion synthesis of α-SiAlON. Three reaction stages were proposed for the formation of α-SiAlON as follows: nitridation of metal powders, formation of the co-existing liquid phase, and precipitation of α-SiAlON with the dissolution of nitrides. Different nucleation and growth modes of rod-like α-SiAlON crystals were observed: crystallization from liquid phase, or nucleation and growth based on the surface of as-existed large crystals.