| Popis: |
The interfacial reaction behavior of Ti3SiC2/Al andTi3SiC2/Al-10si matrix composites at high temperature was studied by XRD and SEM. The results showed that the reaction between Ti3SiC2 and Al matrix is Ti 3 SiC 2 + Al → TiCx + Si + Al 3 Ti . Ti3SiC2 particles in the Ti3SiC2/Al composite were almost completely reacted after 700 °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 ΔG = 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. |
