l Ti B中间合金是一种高效实用的铝合金晶粒细化剂。本文指出了Al Ti B的潜力、不足和发展趋势。概述了Al Ti B结构遗传的化学和物理基础及影响因素 ,Al Ti B细化行为的结构遗传效应 ,TiAl3 在铝熔体结构遗传中的动力学行为 ,α Al的形...l Ti B中间合金是一种高效实用的铝合金晶粒细化剂。本文指出了Al Ti B的潜力、不足和发展趋势。概述了Al Ti B结构遗传的化学和物理基础及影响因素 ,Al Ti B细化行为的结构遗传效应 ,TiAl3 在铝熔体结构遗传中的动力学行为 ,α Al的形核机制。提出了新的Al Ti B制备技术和微细化处理工艺。认为随着Al Ti B质量的不断改进 ,尤其是高效洁净稳定型Al Ti B的出现 ,Al Ti展开更多
A series of Al-Ti-B master alloys were prepared by different preparation routes,and the TiB2 particles in the master alloys were extracted and analyzed.It is found that the forming process has significant influence on...A series of Al-Ti-B master alloys were prepared by different preparation routes,and the TiB2 particles in the master alloys were extracted and analyzed.It is found that the forming process has significant influence on the three-dimensional morphology of TiB2 particles.Different preparation routes result in different reaction forms,which accounts for the morphology variation of TiB2 particles.When the Al-Ti-B master alloy is prepared using ＂halide salt＂ route,TiB2 particles exhibit hexagonal platelet morphology and are independent with each other.In addition,the reaction temperature almost does not have influence on the morphology of TiB2 particles.However,TiB2 particles exhibit different morphologies at different reaction temperatures when the master alloys are prepared with Al-3B and Ti sponge.When the master alloy is prepared at 850 ℃,a kind of TiB2 particle agglomeration forms with a size larger than 5 μm.The TiB2 particles change to layered stacking morphology even dendritic morphology with the reaction temperature reaching up to 1200 ℃.展开更多
文摘l Ti B中间合金是一种高效实用的铝合金晶粒细化剂。本文指出了Al Ti B的潜力、不足和发展趋势。概述了Al Ti B结构遗传的化学和物理基础及影响因素 ,Al Ti B细化行为的结构遗传效应 ,TiAl3 在铝熔体结构遗传中的动力学行为 ,α Al的形核机制。提出了新的Al Ti B制备技术和微细化处理工艺。认为随着Al Ti B质量的不断改进 ,尤其是高效洁净稳定型Al Ti B的出现 ,Al Ti
基金Project(50625101) supported by the National Science Fund for Distinguished Young Scholars of ChinaProject supported by Graduate Independent Innovation Foundation of Shandong University(GIIFSDU),ChinaProject(51071097) supported by the National Natural Science Foundation of China
文摘A series of Al-Ti-B master alloys were prepared by different preparation routes,and the TiB2 particles in the master alloys were extracted and analyzed.It is found that the forming process has significant influence on the three-dimensional morphology of TiB2 particles.Different preparation routes result in different reaction forms,which accounts for the morphology variation of TiB2 particles.When the Al-Ti-B master alloy is prepared using ＂halide salt＂ route,TiB2 particles exhibit hexagonal platelet morphology and are independent with each other.In addition,the reaction temperature almost does not have influence on the morphology of TiB2 particles.However,TiB2 particles exhibit different morphologies at different reaction temperatures when the master alloys are prepared with Al-3B and Ti sponge.When the master alloy is prepared at 850 ℃,a kind of TiB2 particle agglomeration forms with a size larger than 5 μm.The TiB2 particles change to layered stacking morphology even dendritic morphology with the reaction temperature reaching up to 1200 ℃.
