摘要
采用搅拌铸造法制备了 Ti C/ZA43复合材料 ,用环 -块摩擦磨损试验机测试了连续润滑条件下复合材料的滑动摩擦磨损性能。结果表明 ,Ti C颗粒使基体 ZA43合金的微观组织及磨损性能显著改善 ,摩擦系数和磨痕宽度降低且变化平稳。Ti C/ZA43复合材料的磨面光滑 ,磨痕短细 ;而未增强的 ZA43局部表现为粘着磨损 ,表面产生局部的塑性流动。摩擦过程中 ,未增强的ZA43合金次表层的硬度明显降低 ;而 Ti C/ZA43变化不明显。
TiC/ZA43 composite was fabricated by stirring casting technique. The tribology properties of the composites were studied using a block on ring apparatus. Experimental results showed that addition of TiC improves microstructure and wear behavior of ZA43 alloy. The coefficient of friction (μ) decreases with the TiC volume fraction (V f), and the width of worn groove decreases with V f increased. The width of worn groove and μ of the composite during wear testing increase with the applied load increasing. TiC/ZA43 composite has smooth worn surface, whereas unreinforced ZA43 alloy shows adhesive wear. During wear process, sub surface micro hardness of ZA43 alloy decreases dramatically, where as that of TiC/ZA43 composite changes little.
出处
《航空材料学报》
EI
CAS
CSCD
2000年第4期46-51,共6页
Journal of Aeronautical Materials
基金
原机械工业部资助项目! ( 9686)
