(中南工业大学材料科学与工程系，长沙 410083)
摘 要: 证明了真空热处理过程对用熔铸法重力浇注制备的优质石墨-铝硅复合材料的性能有较好影响。通过与石墨包覆铜法和简单可靠的机械合金化法相比较，证明经真空热处理过程制备的上述材料的高温强度达到150 MPa以上，力学性能、物理性能也较好，是制取优质石墨-铝硅复合材料必需可靠的手段，该法还具有 工艺简单可靠、成本低廉。
关键字: 真空热处理；复合材料；石墨-铝-硅
（Department of Materials Science and Engineering,
Central South University of Technology, Changsha 410083, P.R.China）
Abstract: It has been proved that vacuum heat treatment can benifit the properties of high quality graphite-aluminium-silicon material through gravitational cast. Compared the copper plating graphite and ordinary MA method with the process of vacuum heat treatment in gravitational cast, the vacuum heat treatment is essential to produce the high quality graphite-aluminium-silicon material. The high temperature strength of the samples is over 150 MPa, the mechanical and thermal properties are also improved, the technique is simple and the cost is low.
Key words: vacuum heat treatment; composite material; graphite-alum inium-silicon
