SiC颗粒表面处理对SiC/Cu复合材料性能的影响  

Effect of Surface Treatment of SiC Particles on Properties of SiC/Cu Composites

作　　者：王春华[1] 樊雪琴[1] 关绍康[2] 张锐[2] 

机构地区：[1]河南工业大学材料科学与工程学院,郑州450007 [2]郑州大学材料科学与工程学院,郑州450001

出　　处：《机械工程材料》2010年第10期36-39,共4页Materials For Mechanical Engineering

基　　金：河南省杰出青年科学基金资助项目(512002200);河南省高校青年骨干教师资助计划项目(2002年度);河南省重点科技攻关项目(82102230021);河南工业大学博士基金资助项目(2008BS001)

摘　　要：将SiC颗粒在1 100℃和空气气氛下锻烧6 h得到氧化态的SiC颗粒,在5%HF酸中浸泡24 h得到酸洗过的SiC颗粒;然后采用非均相沉淀包裹法制得铜包裹不同状态SiC复合粉体,采用热压烧结工艺制备了含有35%SiC(体积分数)的SiC/Cu复合材料;对复合材料的微观结构和性能进行了研究和分析。结果表明:与原始态SiC颗粒的复合材料相比,对SiC颗粒进行高温氧化和酸洗后使得SiC/Cu复合材料具有不同的界面结合状态,均能提高复合材料的强度和硬度,酸洗态SiC颗粒制备的复合材料强度和硬度均最高。SiC particles were calcined at 1 100 ℃ in air atmosphere for 6 h to obtain oxidized SiC particles and then immersed in aqueous solution of 5 % hydrofluoric acid for 24 h to attain acid-etched SiC particles. Cu coated SiC composite powders were prepared by heterogeneous precipitation coated method and hot pressing sintering was used to prepare SiC/Cu composites with 35vo1~ SiC particles. The microstructure and properties of the composites were analyzed. The results show that compared with the composites prepared with original SiC particles, the composites made by high-temperature oxidations and acid-etched SiC particles exhibited different interracial bonding states with the increase of strength and hardness. The composites made by acid-etched SiC particles had the highest stregth and the highest hardness.

关 键 词：表面处理 SIC/CU复合材料 热压烧结 

分 类 号：TB333[一般工业技术—材料科学与工程]