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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.
The nanocomposites of FE1-XN IX (30% ≤X≤50%, X: atomic percentage) nanocrystalline alloy powders were prepared by mechanical alloying from pure FE powders and NI powders. The phase structure of the powder during mechanical alloying (XRD) analysis of various powder samples in the whole ball milling process showed that the powders of FE1-XN IX (30% ≤X≤50%) were characterized by X-ray powder diffraction After 3 H milling, the grain size of the FCC solid solution in the 10H alloy was below 20 NM. The grain size and ball milling time had a negative exponential relationship. After appropriate time milling, FE1-XN IX series nanocrystalline alloy powders will completely transform from the initial BCC phase and the FCC phase to the FCC (FE, NI) solid solution phase, and the time required decreases with the increase of X.