三氧化二铝短纤维对ZA22合金干摩擦磨损性能的影响  

Effects of Al2O3 Short Fibers on the Dry Friction-Wear Properties of ZA22 Alloy

作　　者：于思荣[1] 何镇明[1] 陈凯[1] 

机构地区：[1]吉林工业大学金属材料工程系,浙江大学

出　　处：《摩擦学学报》1995年第3期193-198,共6页Tribology

基　　金：国家自然科学基金

摘　　要：针对无油润滑场合的实际需要，采用挤压铸造法制取了Ａｌ２Ｏ３短纤维强化ＺＡ２２合金复合材料，并对其在干摩擦条件下的摩擦磨损性能进行了试验研究，同时还用扫描电子显微镜对试样磨损表面形貌进行了观察，进而对材料的磨损机理作了分析与讨论，结果表明，随着Ａｌ２Ｏ３短纤维含量的增大，ｚＡ２２／Ａｌ２Ｏ３复合材料的耐磨性能提高，但摩擦性能降低；当纤维取向垂直于摩擦面时，复合材料的摩擦磨损性能比纤维平行于摩擦面取向时的好；随着载荷或磨损时间的增加，复合材料的摩擦系数相应地减小或增大，而其磨损失重都明显增大，但磨损失重的增大幅度都比ＺＡ２２合金的小，而摩擦系数的增大幅度比ＺＡ２２合金的大；ＺＡ２２合金的磨损机理是以严重的犁削和粘着磨损为主，而ＺＡ２２／Ａｌ２Ｏ３复合材料的磨损机理则是以轻微的犁削和氧化磨损为主。In view of the practical requirement in the field without lubricants,Al2O3 short fiberreinforced ZA22 alloy composites were prepared by means of squeeze casting method,and theirfriction-wear properties were investigated under the condition of dry friction. At the same time,themorphologies of wear surfaces were observed by means of scanning electron microscopy(SEM),andthen the wear mechanisms of those materials were analysed and discussed.The results show that thewear resistance of ZA22/Al2O3 composites is improved with the increase of Al2O3 fibers content,butthe friction property decreases.When fibers are vertical with the wear surface,the friction-wearproperties of the copmosites are better than that when fibers are parallel to the wear surface. Withthe increase of the load or wearing time,the friction coefficient of the composites decreases orincreases,and the weight loss of the composites increases obviously,but the increasing amplitude ofweight loss is smaller than that of ZA22 alloy matrix,and the increasing amplitude of the frictioncoefficient is greater than that of ZA22 alloy matrix. The wear mechanism of ZA22 alloy is mainlythe severe ploughing groove and adhesion,and that of ZA22/Al2O3 composites is mainly the slightploughing groove and oxidation.

关 键 词：短纤维 合金 摩擦磨损 三氧化二铝 

分 类 号：TG13[一般工业技术—材料科学与工程]