碱金属氧化物Na_(2)O对陶瓷结合剂金刚石磨具性能的影响  

Effect of Alkali Metal Oxide Na_(2)O on Performance of Vitrified Bond Diamond Abrasive Tools

作　　者：梅涛 黄启忠[1] 王绍斌 潘富强 冯秀鹏 李洪雪 MEI Tao;HUANG Qizhong;WANG Shaobin;PAN Fuqiang;FENG Xiupeng;LI Hongxue(State Key Laboratory of Powder Metallurgy,Central South University,Changsha 410083,China;Zhuhai Juhai Technology Co.,Ltd.,Zhuhai 519110,China)

机构地区：[1]中南大学,粉末冶金国家重点实验室,长沙410083 [2]珠海市巨海科技有限公司,珠海519110

出　　处：《硅酸盐通报》2021年第3期978-983,共6页Bulletin of the Chinese Ceramic Society

摘　　要：通过调整陶瓷结合剂中碱金属氧化物Na_(2)O含量,来探究碱金属氧化物Na_(2)O对陶瓷结合剂金刚石磨具性能的影响。当n(Na_(2)O)/n(SiO 2)=0.1时,磨具试样的强度(57.7 MPa)和硬度(117 HRB)达到最大值。随着碱金属氧化物Na_(2)O添加量的增加,结合剂的耐火度随之显著降低,流动性显著增加。磨具试样断口SEM照片表明,适量的碱金属氧化物Na_(2)O能够使磨具断面空隙减少,孔隙度降低,结合剂与磨料分布更加均匀,结合剂与磨料结合界面更加紧密。XRD分析表明,磨具试样在720℃下烧结,结合剂中除了玻璃相还产生了一种晶相,结合剂中碱金属氧化物Na_(2)O的含量对烧结后产生的晶相种类无影响。By adjusting the content of alkali metal oxide Na_(2)O in the vitrified bond,the effect of alkali metal oxide Na_(2)O on the performance of the vitrified bond diamond abrasive tool was explored.When n(Na_(2)O)/n(SiO 2)=0.1,the strength(57.7 MPa)and hardness(117HRB)of the abrasive sample are the maximum.With the increase of the alkali metal oxide Na_(2)O,the refractoriness of the vitrified bond decreases significantly,and the fluidity significant increases.The SEM image of the fracture surface of the abrasive tool sample shows that a proper amount of alkali metal oxide Na_(2)O reduces the voids and porosity of the abrasive tool section,the distribution of vitrified bond and abrasive material is more uniform,and the bonding interface between vitrified bond and abrasive material is closer.XRD analysis show that the abrasive sample is sintered at 720℃.In addition to the glass phase,a crystal phase is produced in the bond.The content of alkali metal oxide Na_(2)O in the bond has no effect on the type of crystal phase produced after sintering.

关 键 词：金刚石磨具 碱金属氧化物Na_(2)O 陶瓷结合剂 抗弯强度 硬度 流动性 

分 类 号：TB332[一般工业技术—材料科学与工程]