Molten Al-Mg alloys has been infiltrated into SiC to produce Al matrix composites at 900°C for different infiltration times under N2. The wettability of the ceramic reinforcement by the Al-Mg alloy is crucial in determining whether Al can be infiltrated into ceramic preform. Sessile drop results showed that Al alloys with Mg contents greater than 8wt-% had a contact angle lower than 90°, after 5 minutes contact time, this was associated with the infiltration of Al-Mg alloys into SiC preform occurred after 30 minutes. Sessile drop experiments also show that SiC is similarly wetted by Al-Mg alloys under N2. It is concluded that the infiltration process does not involve the intermediate nitride phase suggested by other authors. These materials were also characterised both mechanical properties and microstructure.
|Number of pages||8|
|Journal||Materials Research Society Symposium - Proceedings|
|Publication status||Published - 2002|