玻璃涂覆CBN磨料的制备及其应用  

Preparation and Application of Glass Coated CBN Abrasive

作　　者：李子成[1] 张爱菊[1] 李志宏[2] LI Zi-cheng;ZHANG Ai-ju;LI Zhi-hong(Hebei Province Building Structure Application Technology Research and Development Center, Shijiazhuang Institute of Railway Technology,Shijiazhuang 050041,China;Key Laboratory of Advanced Ceramics and Machining Technology,Ministry of Education,Tianjin University,Tianjin 300072,China)

机构地区：[1]石家庄铁路职业技术学院,河北省高校建筑结构应用技术研发中心,石家庄050041 [2]天津大学,先进陶瓷与加工技术教育部重点实验室,天津300072

出　　处：《硅酸盐通报》2018年第11期3570-3574,共5页Bulletin of the Chinese Ceramic Society

基　　金：河北省科技计划项目(17211118);河北省高等学校科学技术研究重点项目(ZD2018232)。

摘　　要：采用溶胶凝胶法制备了SiO_2-Al_2O_3-Na_2O基玻璃涂层CBN磨料,通过扫描电子显微镜(SEM)、X射线能谱仪(EDS)、热膨胀仪及力学性能测试仪表征了玻璃涂层CBN磨料的性能,并将玻璃涂层CBN磨料应用于陶瓷结合剂磨具。实验结果表明:SiO_2-Al_2O_3-Na_2O基涂层玻璃的热膨胀系数与CBN磨料相匹配,对CBN颗粒形成良好的包裹润湿。玻璃涂层的CBN磨料单颗粒抗压强度和冲击韧性均比未涂层的磨料有所提高。在陶瓷结合剂CBN磨具中玻璃改性增强了CBN磨料与结合剂的界面区结合,提高了磨料与陶瓷结合剂之间的粘结力。SiO 2-Al 2O 3-Na 2O glass coated CBN abrasive particles were prepared by sol-gel processing.By using scanning electron microscopy(SEM),element dispersive spectrum(EDS)and thermal analyzer together with mechanical strength tester,the properties of glass coated CBN grains and vitrified CBN grinding wheels were studied.The result indicates that the SiO2-Al 2O3-Na2O glass is excellent material for CBN abrasive grains since its coefficient of thermal expansion closely match that of CBN.CBN particles are completely wrapped.Moreover,the impact toughness and single particle compressive strength are significantly increased by covering glass coatings on CBN abrasive particles.The glass coated CBN particles are applied to vitrified grinding wheels,the result showed that the adhesion between abrasive and vitrified bond is improved.

关 键 词：玻璃 涂层 CBN 

分 类 号：TQ174[化学工程—陶瓷工业]