Abstract: A new Zn-based alloy with high Al content was prepared by spray forming and its microstructure and phase characteristics were investigated by scanning electron microscopy(SEM), transmission electron microscopy (TEM) and X-ray diffraction(XRD).It was found the alloy was consisting of Zn-Al eutectoid structure and nano-scale dispersed precipitation. Many anomalous pores were introduced into the alloy during deposition and porosity was over 10%. The best wear resistance was obtained for the heat-treated Zn-40Al-2Cu-6Si alloy under 2000N and 200r/min. It was found that the friction coefficient of the alloy decreased within creasing load.

Key words: spray deposition, Zn-Al alloy, wear and friction, microstructure

Author: Yan Biao, 1. School of Materials Science and Engineering, Tongji University, Shanghai 200092, China; 2. Key Laboratory of Development & Application for Functional Metallic Materials, Shanghai 200092, China

E-mail: yanbiao@vip.sina.com

Tribology, Vol. 29, Issue 6, 2009, 584~591