摘要
研究了La-N i预合金粉在金刚石工具中的作用及机理。结果表明:在金刚石工具胎体中添加1.0%的La-N i预合金粉,金刚石/铜基复合材料的抗弯强度达到最高。利用扫描电镜和能谱对断口进行分析,发现在实验条件下,稀土元素La有向Ti偏聚的倾向,并富集于基体金属与金刚石的界面。经X射线衍射分析发现:合金粉中的活性La可以还原Ti颗粒表面的TiO薄膜,从而增强Ti的活性、净化界面,提高铜基胎体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. When La-Ni powder content is 1.0%, the bonding strength of composite get maximum. Through energy spectrum analysis, it was found that La aggregated to Ti and enriched the interface between metal matrix and diamonds. X-Ray was used to investigate the phase transformation. It was approved that the active La in alloy powder can reduce the oxide film on Ti particles, increase the reactivity of Ti and purify the interface between diamonds and metal matrix.
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2006年第2期23-26,共4页
Diamond & Abrasives Engineering
