摘要
采用热压烧结法制备一种新型Fe3Al基复合材料，讨论基体成分对其摩擦学性能的影响。研究结果表明：本实验中，Fe3Al粉体的最佳球磨时间为60h；随着Al含量提高，Fe3Al基复合材料的摩擦因数略有降低但耐磨性明显提高，合金元素Cr的加入有效地改善了材料的摩擦学性能，以Fe-28Al作为摩擦材料的基体即可很好地满足性能要求；Cu作为基体中的“软相”，摩擦因数随游离Cu含量的增加呈上升趋势但摩擦稳定性变差，且耐磨性降低，Cu含量的最佳范围为12％-18％（质量分数），随着石墨含量的增加，材料的摩擦因数和磨损率都下降，但石墨含量过高会导致材料性能恶化，石墨的最佳含量为8％～12％（质量分数）。
New Fe3Al base composite materials were prepared by mechanical alloying and hot pressing. The effect of composition on the friction and wear properties was discussed. The results show that in this experiment, the optimal ball milling time of Fe3 Al powders is found to be 60 hours. With the increase of Al content, the friction coefficient decreases slightly and the wear resistance increases obviously. The adding of Cr improves the wear properties effectively. Fe-28Al as the matrix of friction material can well satisfy the demand of properties. The friction coefficient presents tendency of increasing, but stability become worse and the wear rate increases with increasing content of the ＂soft phase＂ of Cu, the optimal Cu weight content is 12% - 18%. Increasing the graphite content leads to the decrease of friction coefficient and wear rate and excessively high graphite content would deteriorate the overall properties, the optimal graphite weight content is found to be 8% ~ 12%.
出处
《润滑与密封》
CAS
CSCD
北大核心
2011年第7期22-26,共5页
Lubrication Engineering
基金
山东省优秀中青年科学家奖励基金项目(2007BS04020)
