中国有色金属学报(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 8 No. 4 December 1998 |
（1.Department of Materials, Huazhong University of Scienceand Technology, Wuhan 430074, P. R. China
2.State Key Laboratory of Metal Matrix Composites,ShanghaiJiao Tong University, Shanghai200030, P. R. China）
Abstract:The effect of oxidation of SiC particles on the aging behavior of SiC particles and short mullite fibers reinforced 2024Al composite was investigated. Differential scanning calorimetry(DSC) analysis indicated that the aging precipitation in specimen with as-received SiC particles lagged behind that of unreinforced 2024Al, while in specimen with oxidized SiC particles the precipitation of the GP zone slightly lagged behind that of unreinforced 2024Al, but the precipitation of the S’phase was accelerated and a new peak appeared after the S’peak. On the basis of the results of DSC analysis and TEM observation, it was believed that all these facts were resulted from the interactions among SiC(as-received or oxidized) particles, mullite fibers and the matrix.
Key words: aluminum matrix composite SiC mullite fiber 2024Al alloy aging
