| 摘要 |
PURPOSE:To obtain the SiC whisker reinforced Al alloy composite material having excellent strength and elastic modulus by uniformly dispersing SiC whiskers into an Al alloy matrix contg. Mg and regulating the Al4C3 content and residual oxygen content. CONSTITUTION:SiC whiskers are uniformly dispersed into an Al alloy matrix contg. about 0.4 to 6.0% Mg as reinforced alloy to obtain a composite material. At this time, the Al alloy powder is mixed with about 10 to 30 vol.% SiC whiskers, and the mixture is subjected to HIP, extrusion or the like into the above composite material. The manufacturing conditions in the composite material are regulated to <=0.5wt.% Al4C3 content and <=0.4% residual oxygen content in the composite material. In this way, the SiC whisker reinforced Al alloy composite material having good mechanical characteristics of >=50kgf/mm<2> strength and >=10000kgf/mm<2> elastic modulus can be obtd. Furthermore, the SiC whiskers in three-dimensional orientation are orientated in one direction by extrusion or the like, by which the strength, elastic modulus, etc., in the orientated direction can be improved. |
