氧化铝粉体表面纳米化修饰及其在耐磨涂层中的应用  

Surface modification of Al_2O_3 powders and its application in wear-resistant coatings

作　　者：汪明球[1] 闫军[1] 崔海萍[2] 杜仕国[1] 

机构地区：[1]军械工程学院三系,河北石家庄050003 [2]军械工程学院基础部,河北石家庄050003

出　　处：《材料科学与工艺》2013年第1期123-128,共6页Materials Science and Technology

基　　金：国家自然科学基金(50572122);军械工程学院基础部科研基金(JCB1006)

摘　　要：在低温条件(80℃)下,以钛酸丁酯为原料,利用胶溶–回流法在氧化铝粉体表面制备了纳米TiO2颗粒.通过扫描电镜、X射线衍射、X光电子能谱仪、BET等检测手段对复合颗粒的表面形貌、包覆层相组成、比表面积等进行了表征.结果表明,纳米TiO2颗粒在微粉表面形成纳米薄膜修饰层,包覆层主要为锐钛矿型相,表面纳米化修饰后氧化铝粉体表面的粗糙度显著增加,比表面积较包覆前提高了30倍以上.将经表面纳米化修饰后的微粉应用于以有机硅改性环氧树脂为基体的耐磨涂层中,其磨损失重仅为包覆前复合耐磨涂层的55%,耐磨性显著提高,并初步讨论了复合耐磨涂层的摩擦磨损性能.By using tetrabutyl titanate as the main material,nano-TiO2/Al2O3 composite particles in acidic abundant aqueous solution was prepared by the peptization and reflux method at low temperature（80℃）.The properties of composite particles,including surface morphology,the phase composition of the coating layer,specific surface area,were characterized by SEM,XRD,XPS,BET.The results show that the TiO2 nanoparticles in coating layer of which the main phase was anatase,coated on the Al2O3 powders uniformly and discretely.The surfaces of particles were more rough after coating,the value of specific surface area of the composite particles was elevated by over 30 times than that before coating.Compared with uncoated Al2O3 powders as filler,the abrasive loss of composite coatings decreased to 55 percent of that coatings filled with uncoated Al2O3 powders,when the composite particles were filled in wear-resistant coatings based on the silicone modified epoxy resins.Finally,the wear properties of wear-resistance coatings was discussed preliminarily.

关 键 词：复合颗粒 纳米TIO2 表面纳米化修饰 耐磨 

分 类 号：TB333[一般工业技术—材料科学与工程]