冷压烧结-热挤压复合工艺制备SiC_p/Al-Si复合材料  

SiC_p/Al-Si composites fabricated by cold pressing and sintering-hot extrusion process

作　　者：朱红梅 ZHU Hong-mei(Chongqing Real Estate College, Chongqing 401331, Chin)

机构地区：[1]重庆房地产职业学院

出　　处：《粉末冶金工业》2018年第1期25-29,共5页Powder Metallurgy Industry

基　　金：重庆房地产职业学院2015年一般教改项目(153327)

摘　　要：采用冷压烧结-热挤压复合工艺制备SiCp/Al-Si复合材料,用JEM-2100型高分辨电子透射电镜（HRTEM）分析增强体与基体的界面显微组织。结果表明,粉末冶金工艺制备的SiCp/Al-Si复合材料经热处理后,增强体与基体结合界面清晰平滑,结合良好,性能优良。颗粒增强体SiC和Al基体直接结合,（1103）SiC//（010）Al,错配度δ为0.020 4,衬底相SiC为Al的有效结晶核心,界面易形成半共格界面,有利于提高材料界面的结合强度。合金相Al4Cu9与Al基体界面清晰,完全不共格,经热处理后,合金相Al4Cu9转变为Al2Cu相在Al基体上均匀分布,并形成半共格界面。SiCp/Al-Si composites were prepared by cold pressing and sintering-hot extrusion process. The interface between the reinforcement and the matrix was analyzed by JEM-2100 high resolution electron transmission microscope（HRTEM）. Results show that the interface between the reinforcement and the matrix is clear and smooth in the heat treated SiCp/Al-Si composite. The reinforcement and the matrix have good combination and the composite has good performance. The particle reinforcement SiC and Al matrix are combined directly,（1103）SiC//（010）Al,and the mismatch δ is 0.020 4,the substrate phase SiC is the effective crystallization core of Al. The interface is easy to form semi-coherent interface,which is helpful to improve the bonding strength of the interface. The interface between the alloy phase Al4Cu9 and Al matrix is clear and completely incoherent. After heat treatment,the alloy phase Al4Cu9 is transformed into Al2Cu phase and uniformly distributed in the Al matrix,and the semi-coherent interface is formed.

关 键 词：SiCp/Al-Si复合材料 粉末冶金 界面 位向关系 

分 类 号：TB33[一般工业技术—材料科学与工程]