(西北工業(yè)大學(xué) 凝固技術(shù)國家重點(diǎn)實(shí)驗(yàn)室， 西安 710072)
摘 要: 利用Bridgman法對Zn-2%Cu（質(zhì)量分?jǐn)?shù)）包晶合金進(jìn)行了快速定向凝固實(shí)驗(yàn)研究， 當(dāng)生長速度在1600～6400μm/s時， 得到了類似于共晶的層片狀組織。 利用X射線衍射儀及透射電鏡對層片狀組織進(jìn)行了相組成的分析， 并結(jié)合計(jì)算亞穩(wěn)相圖對該組織的相及組織形成規(guī)律進(jìn)行了分析， 結(jié)果表明在快速凝固條件下Zn-2%Cu包晶合金中實(shí)現(xiàn)共生生長是可能的。
關(guān)鍵字: Zn-2%Cu； 包晶合金； 快速定向凝固； 層片狀組織；亞穩(wěn)相圖
（State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi′an 710072）
Abstract:Unidirectional solidification experiment on Zn-2%Cu(mass fraction) peritectic alloy was carried out by Bridgman method. Lamellar structure was obtained at a solidification velocity between 1600μm/s and 6400μm/s. The structure was investigated by XRD and TEM, combining with the calculated metastable phase diagram. The results show that it is possible to obtain coupled structure in Zn-2%Cu peritectic alloy by rapidly unidirectional solidification method.
Key words: Zn-2%Cu; peritectic alloy; unidirectional solidification; lamellar structure; metastable phase diagram
