Microstructure and mechanism of in-situ Al_2O_(3(p))/Al nano-composites synthesized by sonochemistry melt reaction  

超声化学原位合成Al_2O_(3(p))/Al纳米复合材料的组织及其机理(英文)

作　　者：CHEN Deng-bin ZHAO Yu-tao ZHU Hai-yan ZHENG Meng CHEN Gang 陈登斌;赵玉涛;祝海燕;郑梦;陈刚(江苏大学材料科学与工程学院,镇江212013;硅湖职业技术学院,昆山215332)

机构地区：[1]School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,China [2]Silicon Lake College,Kunshan 215332,China

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第1期36-41,共6页中国有色金属学报（英文版）

基　　金：Project (50971066) supported by the National Natural Science Foundation of China;Project (20070299004) supported by the Research Fund for the Doctoral Program of Higher Education of China;Project (2008-46) supported by the Jiangsu Provincial ‘333’ Project of training the High-level Talents Foundation, China;Project (BE2009127) supported by the Jiangsu Provincial Science Supporting Item, China

摘　　要：The Al2O3（p）/Al nano-composites were fabricated from Al-K2ZrF6-Na2B4O7 system by sonochemistry in situ reaction. The fabrication mechanisms, including high intensity ultrasonic influence on microstructures and reinforcement particles-aluminum matrix interface, were investigated by X-ray diffraction （XRD）, scanning electron microscopy （SEM） and transmission electron microscopy （TEM）. The XRD results show that the component of the as-prepared composites is Al2O3 reinforcement. The SEM analysis results indicate that Al2O3 particles are uniformly distributed in the aluminum matrix. The TEM results show that the morphologies of Al2O3 particles present in nearly sphere-shape, the sizes are in the range of 20-100 nm, and the interfaces are net and no interfacial outgrowth is observed. Analysis with secondary development Image-J software shows that Al2O3 recoveries are firstly improved and then decreased with increasing ultrasonic power. When the power is 0.4 kW, the distribution is the best, and a maximum number of particles are obtained. The reaction mechanisms were investigated.采用超声化学原位反应,以Al-K2ZrF6-Na2B4O7为反应体系,制备Al2O3（p）/Al纳米复合材料。利用扫描电镜和透射电镜,研究高能超声对复合材料组织和颗粒收得率的影响及加入K2ZrF6对反应过程以及增强颗粒与铝基体的界面的影响。X射线衍射（XRD）、扫描电镜（SEM）与透射电镜（TEM）结果表明：所制备的复合材料增强颗粒为Al2O3,Al2O3颗粒在基体中分布均匀,其形貌为近球形,尺寸20~100nm,界面干净且无界面产物。利用经过二次开发的Image-J软件对Al2O3颗粒收得率进行分析,结果表明,Al2O3颗粒收得率随着超声功率的增大呈现出先增大后减小的变化规律。当超声功率达到0.4kW时,颗粒分布最好且数量最多。并对其反应机理也进行了探讨。

关 键 词：SONOCHEMISTRY NANO-COMPOSITES in situ reaction reaction mechanism 

分 类 号：TB383.1[一般工业技术—材料科学与工程]