NdFeB永磁体取向度的X射线测量方法.pdfVIP

维普资讯 心 二 !坠婴 旦 !垦 — — — 强 霸 盔 NdFeB永磁体取向度的X射线测量方法 王 宁。王超群 (北京有色金属研究总院，北京 100088) 摘 要：Nd_Fe_B合金的晶体学织构可以通过 x射线衍射方法测量，但完整的定量织构分析， 通常采用反极 图法如取向度的测定法[引。对于试样局部 区域的精确取 向测量 ，可 以采用 EBSD 方法 ，其取 向度直接与永磁体加工过程微结构的变化相联 系。介绍 了NdFeB永磁体取 向度 的X 射线测量方法，磁取向与晶体学织构关系(包括取向度的研究)分析对于NdFeB永磁体的研制与开 发具有重要的实用价值。 关键词：NdFeB永磁体 ；织构 ；取 向度；X射线衍射 中图分类号：TB302．1 文献标识码 ：A 文章编号：1001—4012(2005)05-0240-03 X—RAY DIFFRACTION MEASUREMENT OFTHEORIENTATION DEGREE IN NdFeBPERMANENT MAGNET W ANG Ning，W ANG Chao-qun (CeneralResearchInstituteforNon-ferrousMetals，Beijing100088，China) Abstract：ThecrystallographictextureofNdFeBalloyscanbemaesuredbyX-Raydiffraction．Becauseofthe complexitiesofthecrystalstructureinNdFeB alloys．completequantitativetextureanalysissuchaspolefigureand ODFanalysisisperformedinfrequently．Usuallytheorientationdegreeisdetemr inedbyusinginversepo lefigure． Thesemethodsgiveinformationregardingthecrystallographictexturethatiseitherqualitativeorindicativeof averagebehavioroftheorientationsofthegainsintheaggregate．ByusingEBSD，theexactorienattionscanbe measuredfrom particularareasofthesample，Theorientationcan berelateddirectlytothemicrostructureand deviationsfrom averagebehaviorcanbehighlightde．Theanalyticalmethodisnma edas “Micro-texture”analysis， butabove-mention po lefigureand ODF analysisbelong to “Macro-texture” analysis．TheX-ray diffraction measurementoforienattiondegreeinNdFeBpermanentmagnethasbeenpresentde inthispaper．Theanalysisof ma gneticalignmentand crysatllographictexturerelationshipshasan importantapplication fortheresaerch and developmentinfabricatedNdFeBmang et． Keywords：NdFeBpermanentmanget~texture；orientationdegree；X-raydiffraction