(南方冶金學(xué)院機(jī)械系， 贛州 341000)
摘 要: 利用擠壓鑄造制備了氧化鋁纖維增強(qiáng)鋅合金復(fù)合材料，研究了氧化鋁纖維對(duì)鋅合金復(fù)合材料凝固組織的影響。結(jié)果表明，在復(fù)合材料中，纖維與基體間存在致密界面層， 合金元素通過(guò)適當(dāng)?shù)幕瘜W(xué)反應(yīng)可改善纖維與基體的結(jié)合；在凝固過(guò)程中，氧化鋁纖維可作為鋅合金共晶體非自發(fā)形核的襯底，纖維/基體界面上的硅在共晶體的共生生長(zhǎng)過(guò)程中起了領(lǐng)先相作用，導(dǎo)致復(fù)合材料的共晶轉(zhuǎn)變由鋁硅共晶轉(zhuǎn)變和鋅鋁共晶轉(zhuǎn)變兩者組成。
關(guān)鍵字: 氧化鋁纖維 鋅合金 復(fù)合材料 凝固組織 硅
（Department of Machinery， Southern Institute of Metallurgy, Ganzhou 341000）
Abstract:Alumina fiber-reinforced zinc alloy composites were manufactured by squeeze casting, and the effects of alumina fibers on the solidified structures of the zinc alloy composites were studied. The results indicate that there is a fine and close interface between the fibers and the matrix, and the alloy elements can improve the combination between the fibers and the matrix in the compostes; the fibers can serve as the sites of hetergeneous nucleation of the eutectic in the zinc alloy during the solidification of the composites, and the silicon on the interface between the fibers and the matrix plays a leading role during the coupled growth of the eutectic so that the eutectic transformation of the composites consists of Al-Si eutectic transformation and Zn-Al eutectic transformation.
Key words: alumina fibers zinc alloy composite solidified structure silicon
