纳米氧化物对CBN磨具陶瓷结合剂性能的影响  

Effect of nano-oxides on properties of vitrified bond for CBN abrasive tools

作　　者：赵志伟[1] 王春华[1] 关春龙[1] 侯永改[1] 邹文俊[1] 白晶[1] 

机构地区：[1]河南工业大学材料科学与工程学院,郑州450007

出　　处：《金刚石与磨料磨具工程》2009年第6期59-61,65,共4页Diamond & Abrasives Engineering

基　　金：河南工业大学博士科研启动基金(2009BS014)

摘　　要：采用Na2O-Al2O3-SiO2-B2O3系统为基础陶瓷结合剂,研究了添加纳米ZnO、纳米TiO2和纳米Al2O3对CBN磨具陶瓷结合剂性能的影响,对抗折强度、耐火度、流动性、微观结构进行了测试。实验结果表明:添加纳米氧化物后,陶瓷结合剂的耐火度和流动性均得到明显改善,其中加入纳米ZnO的陶瓷结合剂耐火度降低了20℃,流动性最大,达到119.9%;添加纳米Al2O3的抗折强度最高,达到36.51MPa;陶瓷结合剂CBN磨具微观结构中气孔率数量明显减少,添加纳米Al2O3的CBN磨具试样的结构最致密,气孔最少。Na2 O-Al2 Oz-SiO2-B2O3 system was used as the basic vitrified bond, effects of additives including nano-ZnO, nano-TiO2 and nano-Al2O3 on properties of vitrified bond for CBN abrasive tools were investigated. Tests and analysis were conducted on the bending strength, refractoriness, fluidity and mierostructure of the bonds. Experiment results showed that the refractoriness and fluidity as well as the bending strength of vitrified bond were improved obviously with the addition of nano-oxides. Nano-ZnO added vitrified bond had the highest fluidity which was 119.9% , its refractoriness was decreased by 20 ℃. When adding nano-Al2O3, the bending strength of the vitrified bond attained to 36.51 MPa, and the pore ratio was reduced remarkably. This bond had the most compact microstructure and

关 键 词：陶瓷结合剂 纳米氧化物 CBN磨具 微观结构 

分 类 号：TG74[金属学及工艺—刀具与模具] TQ164[化学工程—高温制品工业]