中國有色金屬學(xué)報(英文版)
Transactions of Nonferrous Metals Society of China
| Vol. 11 No. 2 April 2001 |
reinforced ZA43 matrix composites
（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
