摘要
利用机械合金化法从纯FE粉和N I粉中制备了FE1-XN IX(30%≤X≤50%,X为原子百分比)系纳米晶合金粉末,并对粉末经机械合金化过程中相结构的转变以及晶粒尺寸的变化做了较为详细的研究.通过对整个球磨过程中各种粉末样品的X射线衍射(XRD)分析发现:FE1-XN IX(30%≤X≤50%)粉末经球磨3 H后已经完全合金化,10H后合金中面心立方(F.C.C.)固溶体的晶粒尺寸都达到20 NM以下;晶粒尺寸与球磨时间存在负指数关系;经过适当时间的球磨,FE1-XN IX系纳米晶合金粉末将由开始的体心立方(B.C.C.)相和F.C.C.相完全转变为F.C.C.(FE,N I)固溶体相,且所需的时间随X的增大而减少.
Nanocrystalline Fe1-xNix （30% ≤x≤50 % ） alloys are prepared by mechanical alloying from pure Fe and Ni powders. The phase transformation and grain sizes of the mechanical-alloyed powders are studied by X-ray diffraction （XRD）. It is found from the XRD patterns that the mixed powders have been fully alloyed after milling for 3hrs and the average grain sizes are all lower than 20nm after 10hrs＇ milling. During ball milling, the average size of grain D in the Fe1-xNix alloys follows exponential relationship. All the samples contain both b. c, c. （Fe,Ni） and f. c.c. （Fe,Ni） solid solution in the early stage of milling, but the b. c. c. phase will transform to f. c.c. phase completely after sufficient milling time. And the time it takes for b. c. c. phase to transform.to f. c. c. phase completely decreases with the increasing of Ni content.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2006年第2期221-224,共4页
Journal of Tongji University:Natural Science
基金
上海市科委基金资助项目(0252NM054
0352NM057)
关键词
机械合金化
高能球磨
纳米晶合金
相变
晶粒尺寸
mechanical alloying
high energy ball milling
nanocrystalline alloy
phase transformation
grain size
