机械合金化和熔炼法制备的Cu-15 Ni-8Sn合金的Spinodal分解  

Spinodal decompositions in Cu-15Ni-8Sn alloys prepared by mechanical alloying and casting

作　　者：曾跃武[1,2] 李志章[3] 

机构地区：[1]浙江大学测试分析中心西溪分中心 [2]浙江大学材料系,杭州310027 [3]浙江大学材料系

出　　处：《中国有色金属学报》2001年第6期1059-1063,共5页The Chinese Journal of Nonferrous Metals

摘　　要：利用透射电子显微镜 (TEM)和X射线多晶衍射仪 (XRD)观察分析了机械合金化 (MA)和熔炼两种方法制备的Cu 15Ni 8Sn(质量分数 ,% )合金在 40 0℃不同时效时间Spinodal分解产生的调幅组织结构和边带卫星峰 ,及合金固溶体的晶格参数变化。同时用维氏硬度计测量了合金的时效硬度变化。结果表明 ,与熔炼法相比 ,MA制备的该合金时效过程中 ,Spinodal分解初期的调幅组织结构波长较大 ,调幅分解速度也慢慢 ,延缓了γ′相的析出 ,但时效过程中二者硬度达到峰值的时间几乎是一致的。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.

关 键 词：CU-15NI-8SN合金 SPINODAL分解 机械合金化 熔炼 铜合金 

分 类 号：TM241[一般工业技术—材料科学与工程] TG146.11[电气工程—电工理论与新技术]