摘要
采用Al/C/TiO2/CBN(各组粉体中,CBN质量分数均为10%)粉体为原料,通过原位反应烧结技术,制备Al/TiC/Al2O3金属陶瓷复合结合剂立方氮化硼(CBN)材料。采用X射线衍射(XRD)、扫描电镜(SEM)结合能谱仪(EDS)分析试样。在1 100℃保温1 h,反应烧结得到Al/TiC/Al2O3金属陶瓷复合结合剂CBN材料。研究结果表明,当采用结合剂组成为4Al/3C/3TiO2的原料(CBN质量分数为10%)时,由于反应放热量较大,导致CBN发生严重的热损伤,CBN都明显断裂。在原料中增加Al的质量分数,可显著降低反应产生的高温,可显著降低热损伤,从而制备不同Al质量分数的Al/TiC/Al2O3金属陶瓷复合结合剂CBN材料。
Al/C/TiO2/CBN(CBN mass fraction 10%) mixed powders were used as the raw materials for the fabrication of Al/TiC/Al2O3 bonded CBN composites by reaction sintering.The sample was analyzed by XRD,SEM and EDS.Al/TiC/Al2O3 bonded CBN composites were produced by reaction sintering at 1 100 ℃ for 1 h.Results showed that when 4Al/3C/3TiO2 was used as binder materials(with CBN mass fraction 10%),there occurred serious heat damage and obvious cracks on the composites because of a large amount of reaction heat.Adding excess Al in the raw materials could obviously decrease the reaction temperature.Therefore,the heat damage of CBN was obviously weakened.Meanwhile,Al/TiC/Al2O3 bonded CBN composites with different mass fraction of Al was obtained.
出处
《金刚石与磨料磨具工程》
CAS
2013年第2期35-38,42,共5页
Diamond & Abrasives Engineering
基金
河南省教育厅科学技术研究重点项目(13A430132)
