Fabrication of TiB2 and TiB2-TiC particulates reinforced magnesium matrix composites

A TiB2 particulate reinforced magnesium matrix composite (MMCs) was fabricated by adding a TiB2-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 TiB2-Al master alloy and TiB2/Mg composite contained a certain amount of transient TiAl3 phase. When the Al-Ti-B system was incorporated with an appropriate C, TiB2 and TiC reinforcing phases were simultaneously synthesized and the TiAl3 phase was almost completely eliminated. (C) 2003 Elsevier B.V. All rights reserved.