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.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第5期458-462,共5页
Acta Metallurgica Sinica
关键词
块体玻璃合金
等温晶化
相转变
纳米晶
锆合金
:bulk glass state alloy, isothermal annealing, phase transformation, nanocrystal
