高体积比SiC_p/6013Al复合材料反应熔渗制备与热学性能  

Reactive Infiltration Processing and Thermal Properties of SiC_p/6013Al Composite with High SiC Particle Content

作　　者：谢盛辉[1] 陈康华[2] 曾燮榕[1] 刘红卫[2] 汤皎宁[1] 

机构地区：[1]深圳大学,深圳市特种功能材料重点实验室,广东深圳518060 [2]中南大学粉末冶金研究所,长沙410083

出　　处：《有色金属》2004年第2期27-30,共4页Nonferrous Metals

基　　金：国家"九五"科技攻关项目 ( 95 -YS -0 0 5 )

摘　　要：采用反应熔渗法在低压力下制备高体积比SiCp/Al复合材料 ,并研究其热学性能。临界熔渗压力与SiC颗粒尺寸及反应程度有关。Al熔体在无压或低压力下能渗入SiC预成形坯 ,制备出组织均匀的高体积比SiCp/Al复合材料 ,SiC颗粒体积分数约 5 0 %。界面反应对SiCp/Al复合材料的CTE的影响很小 ,但会降低SiC/Al的界面传热系数 ,影响材料的导热性能。降低熔渗温度和缩短保温时间可缓减界面反应程度 ,提高复合材料的热学性能 ,CTE在 10× 10 - 6 /K以下 ,复合材料的导热系数达到 164(W·m- 1 ·K- 1 )。The SiC p/Al composite with high SiC particle content is prepared by reactive infiltration under low pressure, and the thermal properties of the composite are investigated. The critical pressure for preparation is related to the dimension of SiC particles and extent of the reaction. The molten Al is infiltrated into the pre-formed SiC base, so the SiC p/Al composite with homogeneous microstructure and high SiC particle content is produced, the SiC particle content is up to 50%. There is slightly effect of interface reaction on CTE of the product, but the thermal conductivity is reduced by the interfacial reaction. To lower infiltration temperature and decrease retention time at high temperature are two effective ways to slow the interfacial reaction and increase the thermal properties of the material, if CTE is controlled below 10×10 -6 /K, the thermal conductivity factor will achieve 164(W·m -1 ·K -1 ).

关 键 词：高体积比 SiCp/6013A1 复合材料 反应熔渗 热学性能 制备 热膨胀系数 导热系数 

分 类 号：TB331[一般工业技术—材料科学与工程]