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Defect Detection in Fe-Cr Alloys with Positron Annihilation Doppler Broadening Spectroscopy

机译:正电子ni没多普勒展宽光谱法检测铁铬合金中的缺陷

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摘要

Positron annihilation Doppler broadening spectroscopy (DBS) has been used for the detection of structural defects in Fe-9wt%Cr (Fe-9Cr) alloy in the as-prepared and implanted states. Defects were created by He and H ion implantation with a kinetic energy of 250 keV. DBS is a nondestructive method and is a unique tool for the observation of open volume defects like vacancies and vacancy clusters in solids. A positron beam with variable positron energy was used for the measurement of defect depth profiles up to 1.5 μm. The obtained results provide qualitative and semi-quantitative information about radiation induced defects and their chemical environment. Although the collision damage from helium implantation was one order of magnitude higher than for the case of hydrogen, the changes in S and W parameters are much less significant, probably due to considerably lower mobility of helium in the implanted materials, which results in helium capture by the created open volume defects.
机译:正电子an没多普勒光谱仪(DBS)已用于检测处于准备状态和注入状态的Fe-9wt%Cr(Fe-9Cr)合金中的结构缺陷。 He和H离子注入的动能为250 keV时会产生缺陷。 DBS是一种非破坏性方法,并且是观察空体积缺陷(例如空位和固体中的空位簇)的独特工具。使用具有可变正电子能量的正电子束来测量最大1.5μm的缺陷深度。获得的结果提供了有关辐射引起的缺陷及其化学环境的定性和半定量信息。尽管氦气注入的碰撞损伤比氢离子注入的碰撞损伤高一个数量级,但S和W参数的变化却不那么明显,这可能是由于氦气在注入的材料中的迁移率相当低,这导致了氦的捕获由所产生的开卷缺陷。

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  • 来源
  • 会议地点 Smolenice Castle(SK)
  • 作者单位

    Institute of Nuclear and Physical Engineering, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 812 19 Bratislava, Slovakia;

    Institute of Nuclear and Physical Engineering, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 812 19 Bratislava, Slovakia;

    Institute of Nuclear and Physical Engineering, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 812 19 Bratislava, Slovakia;

    Institute of Nuclear and Physical Engineering, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 812 19 Bratislava, Slovakia;

    Institute of Nuclear and Physical Engineering, Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovicova 3, 812 19 Bratislava, Slovakia;

    Department of Applied Physics, Aalto University, P.O.Box 1100, FI-02150, Aalto, Finland;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    positron annihilation; Doppler broadening; iron; chromium; alloy; SRIM;

    机译:正电子an灭多普勒增宽;铁;铬;合金;斯里姆;

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