Zr_(52.5)Ni_(14.6)Al_(10)Cu_(17.9)Ti_5块体玻璃合金等温晶化与结构转变  

PHASE TRANSFORMATION OF BULK GLASS ALLOY Zr_(52.5)Ni_(14.6) Al_(10)Cu_)17.9)Ti_5 DURING ISOTHERMAL ANNEALING

作　　者：何国[1] 边赞[1] 陈国良[1] 

机构地区：[1]北京科技大学新金属材料国家重点实验室,北京100083

出　　处：《金属学报》1999年第5期458-462,共5页Acta Metallurgica Sinica

摘　　要：对采用射流成形方法制备的Ｚｒ５２．５Ｎｉ１４．６Ａｉ１０Ｃｕ１７．９Ｔｉ５块体玻璃合金进行等温退火，利用Ｘ射线衍射和ＳＥＭ及ＴＥＭ分析了块状玻璃态合金等温晶化时相转变及组织转变．实验表明，近玻璃转变温度Ｔｇ退火，组织仅发生部分晶化，近晶化温度Ｔｘ和高于Ｔｘ（７０３—７２３Ｋ）退火后，合金完全晶化，组织为Ｚｒ２Ｎｉ０．６７Ｏ０．３３＋ＺｒＡＩ（少量）＋Ｚｒ２Ｃｕ（量）；更高温度（７５３—８２３Ｋ）退火后，晶化组织中ＺｒＡＩ和Ｚｒ２Ｃｕ数量相对增多。The microstructure and phase transformation during crystallization of bulk glass alloyZr52.5 Ni14.6 Al10 Cu17/9 Ti5 prepared by melt injection method are investigated by using XRD, SEM andTEM. The experimental results indicate that a small amount of crystalline appears in the glass matrixafter annealing at near glass transition temperature Tg, but the glass is completely crystallized at nearcrystallization temperature Tx (703 - 723 K) for 600 s, the crystallized phases are Zr2Ni0.67O0.33 and asmall amount of ZrAI and Zr2Cu. After annealing at more high temperature (753 - 823 K) the amountsof ZrAI and Zr2Cu increase, and the alloy consists of nano-sized grains.

关 键 词：块体玻璃合金 等温晶化 相转变 纳米晶 锆合金 

分 类 号：TG146.414[一般工业技术—材料科学与工程] O795[金属学及工艺—金属材料]