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铁族金属对金刚石磨具陶瓷结合剂性能的影响

, PP. 94-98

Keywords: 铁族金属,陶瓷结合剂,金刚石磨具,界面,颗粒增强

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Abstract:

采用粉末冶金技术制备了铁族金属(Ni、Co、Fe)掺杂的R2O-B2O3-Al2O3-SiO2系陶瓷结合剂。研究了添加不同铁族金属对R2O-B2O3-Al2O3-SiO2系陶瓷结合剂耐火度、流动性、微观结构、氧化性能以及抗折强度的影响。结果表明:结合剂耐火度随着金属Co粉添加量的增加而升高,在Fe粉的添加量小于20%(质量分数,下同)时结合剂耐火度有明显的降低趋势,Ni粉的加入对陶瓷结合剂耐火度影响不大;在空气气氛下750℃烧结时,所添加的金属粉均有部分发生氧化,氧化程度为Fe>Co>Ni;添加金属粉后结合剂抗折强度均有不同程度的提高,其中添加25%Co的结合剂强度最高,达到75.42MPa,所添加的金属颗粒与陶瓷结合剂结合紧密程度为Co>Ni>Fe。

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