Fabrication of TiB_2 and TiB_2-TiC particulates reinforced magnesium matrix composites

摘要

A TiB_2 participate reinforced magnesium matrix composite (MMCs) was fabricated by adding a TiB_2-Al master alloy processed via self-propagating high-temperature synthesis (SHS) reaction in Al-Ti-B system into molten magnesium and using the stir casting technique. The results showed that the TiB_2-Al master alloy and TiB_2/Mg composite contained a certain amount of transient TiAl_3 phase. When the Al-Ti-B system was incorporated with an appropriate C, TiB_2 and TiC reinforcing phases were simultaneously synthesized and the TiAl_3 phase was almost completely eliminated.