(1. 浙江大學(xué) 測(cè)試分析中心西溪分中心， 杭州 310028；
2. 浙江大學(xué) 材料系， 杭州 310027)
摘 要: 利用透射電子顯微鏡(TEM)和X射線多晶衍射儀(XRD)觀察分析了機(jī)械合金化(MA)和熔煉兩種方法制備的Cu-15Ni-8Sn(質(zhì)量分?jǐn)?shù)，%)合金在400℃不同時(shí)效時(shí)間Spinodal分解產(chǎn)生的調(diào)幅組織結(jié)構(gòu)和邊帶衛(wèi)星峰，及合金固溶體的晶格參數(shù)變化。同時(shí)用維氏硬度計(jì)測(cè)量了合金的時(shí)效硬度變化。結(jié)果表明，與熔煉法相比， MA制備的該合金時(shí)效過(guò)程中，Spinodal分解初期的調(diào)幅組織結(jié)構(gòu)波長(zhǎng)較大，調(diào)幅分解速度也慢慢，延緩了γ′相的析出，但時(shí)效過(guò)程中二者硬度達(dá)到峰值的時(shí)間幾乎是一致的。
關(guān)鍵字: Cu-15Ni-8Sn合金； Spinodal分解； 機(jī)械合金化
prepared by mechanical alloying and casting
（1. Center of Test & Analysis, Zhejiang University,
Xixi Campus, Hangzhou 310028, P.R.China;
2. Department of Materials Science and Engineering,
Zhejiang University, Hangzhou 310027， P.R.China）
Abstract: Spinodal modulation structures, the satellite peaks and the change of lattice parameter of Cu-15Ni-8Sn alloys prepared by mechanical alloying and casting were investigated by means of TEM and XRD, during ageing at 400℃.The hardness was measured before and after the ageing treatment. As the results demonstrated, the size of modulation structures of the alloy prepared by mechanical alloying was smaller at early ageing time, the speed of the Spinodal modulation decomposition was slower and the γ′phase formation was retarded, than that prepared by casting, but their maximum hardness resulted nearly at the same ageing time.
Key words: Cu-15Ni-8Sn alloy; Spinodal decomposition; mechanical alloying
