(北京工業(yè)大學(xué) 材料科學(xué)與工程學(xué)院，北京 100124)
摘 要: 以Mg-Zn-Gd準(zhǔn)晶中間合金為增強(qiáng)相，AZ31鎂合金為基體合金，采用多次循環(huán)塑性變形技術(shù)制備準(zhǔn)晶增強(qiáng)鎂基復(fù)合材料，并在低載荷條件下對(duì)合金和復(fù)合材料進(jìn)行耐磨性能研究。結(jié)果表明:當(dāng)變形次數(shù)為250次時(shí)，準(zhǔn)晶中間合金含量為10%(質(zhì)量分?jǐn)?shù))的復(fù)合材料中第二相分布最為均勻;AZ31鎂合金和復(fù)合材料的摩擦因數(shù)均隨載荷的增加而略有降低;高熱穩(wěn)定性及高硬度準(zhǔn)晶的加入有效提高復(fù)合材料的耐磨性能。
關(guān)鍵字: Mg-Zn-Gd準(zhǔn)晶;復(fù)合材料;反復(fù)塑性變形;磨損
（College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China）
Abstract:The Mg-Zn-Gd icosahedral quasicrystal master alloy particles was added into the AZ31 alloy by the repeated plastic working (RPW) process in order to produce AZ31 based composite reinforced by the icosahedral phase. The wear-resistance of the alloys and compositions under a lower load were investigated. The results show that the distribution of reinforcement in the composite with 10% (mass fraction) quasi-crystal master alloy is significantly uniform. The wear coefficient of the AZ31 alloy and composites decreases as the load increases. On the whole, the addition of high-stable and high-hard icosahedral quasicrystal leads to obvious improvement of wear-resistance property.
Key words: Mg-Zn-Gd icosahedral quasicrystal; composite; repeated plastic working; wear
