基于中子布拉格边成像的材料表征技术进展
Progress of material characterization techniques based on neutron Bragg-edge transmission imaging
王杨文 1徐平光 2苏玉华 3马艳玲 4王红鸿1
作者信息
- 1. 武汉科技大学省部共建耐火材料与冶金国家重点试验室,湖北武汉 430081
- 2. Materials Sciences Research Center,Japan Atomic Energy Agency,Ibaraki 319-1195;Center for Advanced Photonics,Institute of Physical and Chemical Research(RIKEN),Saitama 351-0198
- 3. J-PARC Center,Japan Atomic Energy Agency,Ibaraki 319-1195
- 4. 广东(东莞)材料基因高等理工研究院,广东东莞 523000
- 折叠
摘要
随着散裂中子源大科学装置技术的迅速发展,可获得的中子束通量得到显著提高,中子成像技术也获得了进一步的发展.由于中子束通量的限制,传统的中子成像技术需使用波长范围较宽的中子束以获得较高的通量条件.近年来,通过利用大型加速器散裂中子源获得的高通量脉冲中子束,基于布拉格边效应的能量(波长)分辨中子成像技术,即中子布拉格边透射成像技术,因其具备高能量分辨率、空间分辨率和能够探测晶体学信息的特点,显示出了日益广阔的应用潜力.简要介绍了该技术的基本原理,评述了其在残余应变、相组成、位错密度和取向织构表征等方面的多个应用研究范例,以期对相关技术的推广普及发挥出积极的作用.
Abstract
With the rapid development of spallation neutron source large-scale scientific facility technologies,the neutron beam flux that can be obtained has been significantly enhanced,and the neutron imaging technique has been also further developed.Due to the limitation of neutron beam flux,the conventional neutron imaging techniques require neutron beam with wide wavelength range to obtain relatively high flux conditions.In recent years,the high-flux pulsed neutron beam has been obtained via the large accelerator spallation neutron source.The energy(wavelength)resolved neutron imaging tech-nique based on Bragg-edge effect,i.e.,neutron Bragg-edge transmission imaging technology,has showed a wide applica-tion potential due to its high energy resolution,high spatial resolution and the ability to detect the crystallographic informa-tion.The fundamental principle of this technology was briefly introduced.Some application cases in residual strain,phase composition,dislocation density and oriented structure characterization were reviewed to play a positive role in the populari-zation of relevant techniques.
关键词
中子布拉格边透射成像/散裂中子源/残余应变/组成相/位错密度/取向织构Key words
neutron Bragg-edge transmission imaging/spallation neutron source/residual strain/phase composition/dislo-cation density/oriented structure引用本文复制引用
基金项目
国家自然科学基金项目(51971165)
湖北省重点研发计划项目(2021BID003)
出版年
2024
NETL
NSTL
万方数据