Effect Of Si Element On The Interfacial Reaction Of Ti3sic2 Reinforced Al Matrix Aomposites

The interfacial reaction behavior of Ti3SiC2/Al andTi(3)SiC(2)/Al-10si matrix composites at high temperature was studied byXRDand SEM. The results showed that the reaction between Ti3SiC2 and Almatrix is Ti3SiC2 + Al -> TiCx + Si + Al3Ti. Ti3SiC2 particles in the Ti3SiC2/Al compositewere almost completely reacted after 700 degrees C/1 h treatment, whilea large amount of Ti3SiC2 particles still existed in the Ti3SiC2/Al-10Si composite under the same treatment condition. In addition, the friction coefficient and wear amount of Ti3SiC2/Al composite were 0.54 and 0.167 g, respectively, and that in Ti3SiC2/Al-10Simatrix composites were 0.29 and 0.019 g. According to the critical condition of.G.=.0, it is calculated that when the activity of Si is greater than 0.57, the interfacial reaction between Ti3SiC2 and Al matrix is inhibited.