Effect of Ti/B on fabricating TiB2p/AZ91 composites by employing a TiB2p/Al master alloy

Effect of Ti/B on fabricating TiB2p/AZ91 composites by employing a TiB2p/Al master alloy
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Ti/B 对 TiB2p/Al 中间合金制备 TiB2p/AZ91 复合材料的影响

DOI:
10.1016/j.jallcom.2005.11.076
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发表时间:
2006-09
影响因子:
6.2
通讯作者:
--
中科院分区:
材料科学2区
文献类型:
--
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采用自蔓延高温合成(SHS)工艺,将不同Ti:B摩尔比(nTi:n B =1:2和nTi:n B =1:2.5)的Al-Ti-B体系制备的TiB 2-Al中间合金添加到镁液中,采用半固态浆料搅拌技术制备了TiB 2颗粒增强镁基复合材料。当Ti:B摩尔比为1:2时,TiB 2-Al中间合金和TiB 2 p/AZ 91复合材料中均含有一定量的TiAl 3相;当Ti:B摩尔比为1:2.5时,TiAl 3相几乎完全消失,TiB 2颗粒在镁基体中的分布更加均匀。
The TiB2particulate reinforced magnesium matrix composites (MMCs) were fabricated by adding a TiB2–Al master alloy processed via self-propagating high-temperature synthesis (SHS) reaction of Al–Ti–B systems with the different molar ratio of Ti to B (nTi:nB=1:2 and nTi:nB=1:2.5, respectively) to molten magnesium and using the semisolid slurry stirring technique. When the molar ratio of Ti to B is 1:2 in TiB2–Al master alloy, the TiB2–Al master alloy and TiB2p/AZ91 composites contained a certain amount of transient TiAl3phase; however, when the molar ratio of Ti to B is 1:2.5, the TiAl3phase was almost completely eliminated and the distribution of TiB2particulates generally appeared to be more homogeneous throughout the magnesium matrix.
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