晶体材料微观结构的同步辐射白光劳厄微衍射研究

发布时间：2018-04-13 02:01

本文选题：白光劳厄微衍射 + 晶体结构　；参考：《中国材料进展》2017年03期

【摘要】：伴随着特种聚焦镜的出现和同步辐射技术的发展,利用微聚焦的同步辐射多波长X射线进行白光劳厄微衍射成为可能。通过白光劳厄微衍射实验,可以对材料局域微观结构进行无损定量表征,并建立材料的微观特性与机械性能之间的关系。脆性多晶Nd_2Ir_2O_7材料及激光3D打印的镍基高温合金材料的研究,体现了同步辐射白光劳厄微衍射技术在研究非均一的多相多晶材料的晶体取向、晶格畸变、缺陷类型和密度等重要微观结构信息方面的特点与优势。随着数据采集和数据分析的飞跃式发展,即使以微小的步长对样品上一个较大的区域进行劳厄微衍射实验,也可以近乎实时的获得晶体材料微观结构的定量图像。同步辐射白光劳厄微衍射发展至今已有20多年,并且新的同步辐射纳米衍射线站正在全世界范围内建设和服役。简单概括了同步辐射白光劳厄微衍射其实验设施、当前应用、最新技术发展以及未来可能涉及的领域,并借此激励更多的中国学者利用同步辐射白光劳厄微衍射技术进行材料科学的研究。
[Abstract]:With the appearance of special focusing mirror and the development of synchrotron radiation technology, it is possible to use multi-wavelength X-ray of microfocused synchrotron radiation to carry out white ray Laue microdiffraction.The local microstructure of the material can be characterized quantitatively by the white light Laue microdiffraction test and the relationship between the microstructure and the mechanical properties of the material can be established.The study of brittle polycrystalline Nd_2Ir_2O_7 materials and laser 3D printed Ni-base superalloy materials shows that synchrotron radiation white light Laue microdiffraction technique is used to study the crystal orientation and lattice distortion of heterogeneous polycrystalline materials.The characteristics and advantages of microstructural information such as defect type and density.With the rapid development of data acquisition and data analysis, the quantitative images of the microstructure of crystal materials can be obtained almost in real time, even if a large area on the sample is tested with a small step size.Synchrotron radiation white Laue microdiffraction has been developed for more than 20 years, and a new synchrotron radiation nanocrystalline diffraction wire station is being constructed and in service all over the world.In this paper, the experimental facilities, current applications, latest technological developments and possible future fields of synchrotron radiation white ray Laue microdiffraction are briefly summarized.Thus more and more Chinese scholars are encouraged to study material science by using synchrotron radiation white light Laue micro diffraction technique.
【作者单位】：西安交通大学金属材料强度国家重点实验室微纳尺度材料行为研究中心;
【基金】：国家重点研发计划(2016YFB0700404) 国家重点基础研究发展计划(2015CB057400) 国家自然科学基金(51671154)
【分类号】：O76;O434.19

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