EFFECT OF OXIDATION OF SiC ON AGING CHARACTERISTICS OF SiC PARTICLES AND SHORT MULLITE FIBERS REINFORCED2024Al COMPOSITE

来源期刊：中国有色金属学报(英文版)1998年第4期

论文作者：Mei Zhi Jin Yanping Gu Mingyuan Wu Renjie

文章页码：592 - 596

Key words：aluminum matrix composite　,SiC,　mullite fiber,　2024Al alloy　,aging

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.