原位反应合成TiB2的生长行为  

Growth Behavior of In-situ Synthesized TiB_2 Particle

作　　者：乐永康[1] 张建平[1] 陈东[2] 马乃恒[2] 王浩伟[2] 毛建伟[2] 

机构地区：[1]苏州有色金属研究院有限公司 [2]上海交通大学材料科学与工程学院

出　　处：《特种铸造及有色合金》2008年第2期102-105,共4页Special Casting & Nonferrous Alloys

摘　　要：研究了(K2TiF6+KBF4)/A356混合盐反应体系中原位合成TiB2增强相的热力学行为及其晶体生长行为。结果表明,原位反应温度明显影响反应体系最终产物及TiB2增强相的形貌。(K2TiF6+KBF4)/A356体系原位反应温度应控制在850℃为宜,由此可以完全消除TiAl3脆性相,并生成六棱粒状TiB2增强相颗粒,提高增强相强化效果。The thermo-dynamics and crystal growth of in-situ synthesized TiB2 reinforcement were investigated in A356 Al/K2TiF6 +KBF4 mixed salt reaction system.The results indicate that the in-situ reaction temperature has affected significantly the final product in the system and morphology of TiB2 reinforcement.The TiAl3 phase in the composites can be totally disappeared and six-rowed granular TiB2 reinforcement can be generated with controlling reaction temperature of A356 Al/K2TiF6 +KBF4 mixed salt reaction system at 850 ℃,which is beneficial to improving the enhancing effects.

关 键 词：铝基复合材料 原位合成 TIB2 晶体生长 

分 类 号：TB33[一般工业技术—材料科学与工程]