同步辐射高能X射线衍射在材料研究中的应用进展

发布时间：2018-01-24 21:14

本文关键词： 同步辐射高能X射线衍射材料科学多尺度表征形变相变　出处：《中国材料进展》2017年03期 　论文类型：期刊论文

【摘要】：同步辐射是具有连续光谱宽波段、高通量、低发散度等优点的先进脉冲X射线光源,可用于开展其它光源无法实现的诸多前沿科学研究。第三代同步辐射光源产生的高能X射线,能大幅提高衍射的倒易空间分辨率、穿透深度及时间分辨能力,实现使役条件下工程材料与部件内部多尺度微结构单元的高效原位、精确无损表征。配备满足透射几何条件、能施加多种力物性环境的原位装置,有助于建立多场耦合下材料的跨尺度力学模型。简述了同步辐射高能X射线衍射的基本原理、第三代同步辐射光源的装置与特点,介绍了高能X射线衍射在材料形变行为、相变以及再结晶等领域的研究进展。最后基于国内外先进光源的发展现状,展望了同步辐射高能X射线衍射技术进步的主要方向。
[Abstract]:Synchrotron radiation (SRR) is an advanced pulse X-ray source with the advantages of continuous spectrum wide band high flux low divergence and so on. The third generation synchrotron radiation source can greatly improve the spatial resolution of diffraction, penetration depth and time resolution. In order to realize the efficient in-situ, accurate and lossless characterization of engineering materials and components in multi-scale microstructural units, the in-situ device which satisfies the transmission geometry conditions and can apply a variety of mechanical and physical properties can be applied to the engineering materials and components. It is helpful to establish a cross-scale mechanical model of materials under multi-field coupling. The basic principle of high-energy X-ray diffraction of synchrotron radiation and the device and characteristics of the third-generation synchrotron radiation light source are briefly described. The research progress of high energy X-ray diffraction in the field of material deformation behavior, phase transition and recrystallization is introduced. Finally, based on the development of advanced light sources at home and abroad. The main progress of synchrotron radiation high energy X-ray diffraction technology is prospected.
【作者单位】：北京科技大学新金属材料国家重点实验室;
【基金】：国家自然科学基金资助项目(51471032,51231002,51527801) 中央高校基本科研业务费(06111020,06111040)
【分类号】：O434.19
【正文快照】： 1前言材料的形变和相变行为是由材料晶体结构与多尺度的微结构单元决定。多尺度的微结构主要包括相组成及分布、晶粒尺寸分布、晶粒取向分布及局域不均匀微观特征如形变带等。利用基于同步辐射的高能X射线衍射技术(High En-ergy X-Ray Diffraction,以下简称“HE-XRD”),可以表

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