高能球磨Fe_(70)Ni_(30)纳米晶的XRD和HRTEM研究  

XRD and HRTEM Analyses of the Ball Milled Nanocrystalline FeNi Alloy

作　　者：王维[1] 官建国[1] 王琦[2] 张清杰[1] 

机构地区：[1]武汉理工大学材料复合新技术国家重点实验室,武汉430070 [2]济南大学材料科学与工程学院,济南250022

出　　处：《武汉理工大学学报》2006年第5期4-7,共4页Journal of Wuhan University of Technology

基　　金：863计划项目(2002AA3053022005AA305G50);教育部优秀青年教师资助计划项目(2002[350])

摘　　要：用XRD（X射线衍射）和HRTEM（高分辨透射电镜）研究了高能球磨Fe70Ni30二元金属合金的微结构随球磨时间（t）的变化情况。结果表明：以羰基铁和羰基镍为原料，通过高能球磨得到了bcc结构FeNi纳米晶合金。球磨10h时，羰基铁和羰基镍开始形成合金，但大部分R、Ni原子仍分别以bcc结构和fcc结构存在。球磨100h时，样品以bcc结构的FeNi合金为主，球磨200h后，样品中fcc结构Ni特征峰几乎消失，FeNi纳米晶达到最小粒径的平衡值。～8nm。高能球磨过程中，晶界区域的层错缺陷是合金化和纳米晶形成的重要因素．The nanostrueture of the ball milled FeNi particles were characterized as functions of the ball milling time （ t ） using quantitative X-ray diffraction （XRD）, high resolution transmission electronic microscopy （HRTEM） analysis techniques. The results showed that the nanocrystalline bcc FeNi particles were available using carbonyl iron and nickel powders as the raw materials during the high-energy ball milling. After 10 h ball milling, the alloy of carbonyl iron and carbonyl nickel began to form, and the sample kept its original bcc and fee structure; after 100 h ball milling, the sample became a solid solution with bcc structure; after 200 h ball milling, the diffraction peak of Ni almost disappeared and the isotropie grains with Dmin achieved, which was mainly attributed to the dislocations and disclinations of the nanocrystalline bce FeNi suffering from severe plastic deformation by ball milling.

关 键 词：高能球磨 羰基铁 羰基镍 合金 纳米晶 

分 类 号：O641[理学—物理化学]