摘要
本文研究了CeO2在Cu基胎体金刚石锯片中与Al、Mg作用的机理。热力学计算和X-射线衍射分析表明,烧结条件下,胎体中的Al、Mg与CeO2发生反应:3CeO2+4Al→2Al2O3+3[Ce],CeO2+2Mg→2MgO+[Ce],生成活性[Ce]、Al2O3和MgO。活性[Ce]降低金刚石与胎体间的界面能,实现胎体材料对金刚石的牢固粘结。在Cu-Al胎体和Cu-Mg胎体中,CeO2的最佳添加量分别为:0.4%和0.6%。切割石材试验表明:CeO2的加入,可以提高金刚石锯片的切割速度,降低脱落度;但切割寿命略有下降。
In this paper the action mechanism of CeO2 with A1 and Mg in Cu matrix for diamond saw blade was researched. Thermodynamic and X-Ray analysis showed that the reaction was generated between CeO2 and A1 or Mg in matrix, i. e. 3CeO2 ＋ 4A1→2A1203＋3 [ Ce], CeO2 ＋ 2Mg→2MgO ＋ [ Ce] which obtain [ Ce], A1203 and MgO during the sintering. The active [ Ce] can decrease the interface energy between diamond and matrix thus the deep-set viscidity of matrix to diamond is actualized. The optimal amount of CeO2 in Cu-A1 and Cu-Mg matrix is respectively 0.4% and 0.6%. Cutting test showed that when adding CeO2 in Cu matrix, the cutting speed of diamond saw blade increased, the desquamation rate of diamond decreased. However the cutting life of diamond saw blade was a bit reduced.
出处
《金刚石与磨料磨具工程》
CAS
北大核心
2007年第5期31-33,46,共4页
Diamond & Abrasives Engineering
