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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 11    No. 2    April 2001

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Friction and wear behavior of TiC particle
reinforced ZA43 matrix composites
XIE Xian-qing(谢贤清)1, ZHANG  Di(张 荻)1, LIU Jin-shui(刘金水)2, WU Ren-jie(吴人洁)1

1. State Key Laboratory of Metal Matrix Composites,
Shanghai Jiaotong University,Shanghai 200030, P.R.China;
2. College of Mechanical & Automotive Engineering,
Hunan University, Changsha 410082, P.R.China

Abstract:TiC/ZA43 composites were fabricated by XDTM and stirring-casting techniques. The tribology properties of the unreinforced ZA43 alloy and the composites were studied by using a block-on-ring apparatus. Experimental results show that the incorporation of TiC particles improves the microstructure of ZA43 matrix alloy. The coefficient of friction μ and the width of worn groove decrease with the increase of TiC volume fraction φ(TiC). The width of worn groove and μ of the composite during wear testing increase with increasing the applied load. Metallographic examinations reveal that unreinforced ZA43 alloy has deep ploughing grooves with obvious adhesion phenomenon, whereas TiC/ZA43 composites have smooth worn surface. Delamination formation is related to the fatigue cracks and the shear cracks on the surface.

 

Key words: ZA43 alloy; TiC particle; fine equiaxed grain; friction and wear

ISSN 1672-7029
CN 43-1423/U

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