摘要
运用真空热压烧结处理方式制备得到车用TiCN颗粒增强钛铁基复合材料,实验测试分析TiCN颗粒含量对复合材料组织和性能的影响。研究结果表明:在复合材料内存在TiCN与α-Fe两种物相结构。15%TiCN试样含有较少的表面气孔,TiCN可以和α-Fe形成良好结合状态。随TiCN含量增加,相对密度先升高再下降,气孔率变化趋势相反,硬度不断提高。15%TiCN试样达到最高的相对密度97.1%,形成了最小的气孔率3.32%。当TiCN加入量提高后,所有复合材料试样都表现为力学强度先增大后降低。试样体积磨损率发生了先降低后上升的变化,在加入15%的TiCN试样达到了最低体积磨损率。当加入的TiCN含量提高后,形成更浅的磨损犁沟,耐磨性表现出先增加后减小的变化,最大值发生在15%TiCN试样。
The TiCN-reinforced Ti-Fe-based composite,an advanced automotive material,was synthesized by in-situ hot pressing sintering in vacuum.The influence of the content of TiCN-powder on the microstructures,phase structures and trobological behavior was investigated with X-ray diffraction,scanning electron microscopy and conventional mechanical probes.The results show that TiCN-content had a major impact.To be specific,as the TiCN-content increased,the hardness of the composite,comprising TiCN-reinforcedα-Fe phase,increased,the relative density and mechanical strength changed in an increase-decrease mode,and the porosity and volume wear-rate varied in a decrease-increase manner;a content of 15%(wt.)TiCN resulted in a relative density peak of 97.1%,a porosity valley of 3.32%and a volume wear-rate valley,respectively.A high TiCN-content might considerably deteriorate the tribological properties of the composite material.Possible mechanism(s)was also tentatively discussed in a thought provoking way.
作者
张丹丹
潘海洋
陈冲
张恩平
Zhang Dandan;Pan Haiyang;Chen Chong;Zhang Enping(Department of Urban Rail Transit,Zhengzhou Technical College,Zhengzhou 450121,China;Zhengzhou Metro Group co.,LTD,Zhengzhou 450121,China)
出处
《真空科学与技术学报》
EI
CAS
CSCD
北大核心
2020年第2期158-162,共5页
Chinese Journal of Vacuum Science and Technology
基金
河南省科技厅科技攻关计划项目(172102210567).
关键词
TiCN颗粒
钛铁合金
力学性能
耐磨性能
TiCN particles
Ti-Fe alloy
Mechanical properties
Abrasion resistance
