摘要
在高温Al熔体内原位反应合成了Ti C颗粒进而制备了不同质量分数Ti C增强相的Al基复合材料。实验发现,原位生成的Ti C相与基体结合紧密,能有效细化基体组织。随着基体中Ti C含量增加,复合材料的致密性下降,但硬度增大,Ti C含量为10wt%时具有最佳硬度。摩擦测试表明:随Ti C增强颗粒的增加,复合材料磨损率减小,复合材料在10 N和25 N载荷下经30 m磨损行程,其磨损失重率仅分别为0.45%和0.67%,表明其具有优良的抗磨损性能。摩擦后复合材料表面产生了大量平行而明显的"犁削"痕迹,其摩擦机制主要为疲劳磨损。
TiC particulates were in-situ reactively synthesized from the high-temperature Al melt and thus the Al-matrix composites with the different mass fraction TiC reinforced phase were prepared. It is found that, the in-situ formed TiC phase binds tightly with the matrix, and can refine the matrix microstrncture availably. With the TiC content in the matrix increasing, the composites＇ densification decreases, but the hardness rises and achieves the maximum at 10wt% TiC content. The friction testing shows that, the wear loss ratio of composites reduces with the TiC reinforced particulates increasing. Under 10 N and 25 N loading after suffering from 30 m worn distance, the worn weight loss ratios of composites are just 0.45% and 0.67%, respectively, which means it has the excellent wear resistance property. After friction, a large number of clear and parallel ＂plough＂ trace appears on the surface of the composites, and the friction mechanism is mainly fatigue abrasion mode.
作者
宋谋胜
张杰
李勇
王应
张东方
SONG Mousheng ZHANG Jie LI Yong WANG Ying ZHANG Dongfang(Department of Physics and Electronic Engineering, Tongren College, Tongren 554300, Chin)
出处
《热加工工艺》
CSCD
北大核心
2017年第20期116-120,共5页
Hot Working Technology
基金
贵州省科学技术基金项目(黔J字[2014]2158)
贵州省教育厅自然科学研究项目(KY[2012]068)
关键词
反应合成
TIC颗粒
AL基复合材料
摩擦性能
reactive synthesis
TiC particulate
Al-matrix composites
friction property
