摘要
通过在金刚石工具胎体中添加La-N i预合金粉,利用扫描电镜对工具胎体的微观结构分析发现,稀土合金粉的适量加入可减少胎体中的孔隙,并使氧化物夹杂细小,圆化;La向Ti元素迁移,并向金刚石与金属基体界面偏聚。经X射线衍射分析发现,合金粉中的活性La能够还原Ti颗粒表面的氧化物薄膜,提高了Ti的活性,从而促进了Ti和金刚石的反应。证实了稀土对胎体材料具有催化活化和净化金刚石与金属基体界面等作用,提高了胎体材料对金刚石的粘结性能。
This paper investigated the effects of La-Ni alloy powder on the matrix properties of granite saw blade. SEM was used to investigate the fracture section, the distribution of elements and the interface of matrix--diamond. The results showed that the addition of the rare earth alloy powder refined and dispersed oxide particles. Through energy spectrum analysis, it was found that the rare earth congregates to Ti and the interface between metal matrix and diamonds. The active La in alloy powder can reduce the oxide film on Ti particles, increase the reactivity of Ti, and promote the reaction between Ti and diamond. The research showed that the functions of the rare earth are catalysis activation and purification of the metal matrix/diamond composite interface. The addition of rare earth can increase the bonding strength between diamond and metal matrix.
出处
《稀土》
EI
CAS
CSCD
北大核心
2007年第1期60-62,83,共4页
Chinese Rare Earths
关键词
断口扫描
La—Ni预合金粉
偏聚
界面
fracture scanning
La-Ni alloy powder
congregating
the interface
