Fabrication of CuAlTiWV high entropy alloy film and its helium damage induced by helium co-deposition and annealing

Yunpeng HE; Yuanxia LAO; Sen SUN; Wenxiao NIU; Nan QIU; Yuan WANG

doi:10.11889/j.0253-3219.2018.hjs.41.100602

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Fabrication of CuAlTiWV high entropy alloy film and its helium damage induced by helium co-deposition and annealing

NUCLEAR ENERGY SCIENCE AND ENGINEERING | 更新时间：2021-05-19

- Fabrication of CuAlTiWV high entropy alloy film and its helium damage induced by helium co-deposition and annealing
- NUCLEAR TECHNIQUES Vol. 41, Issue 10, Article number: 100602(2018)
- 作者机构：
  
  1.四川大学原子核科学与技术研究所辐射物理及技术教育部重点实验室成都 610064
  2.中国科学院核用材料与安全评价重点实验室沈阳 110016
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China;National Natural Science Foundation of China;Open Subject of Key Laboratory for Nuclear Materials and Safety Assessment, Chinese Academy of Sciences
- DOI：10.11889/j.0253-3219.2018.hjs.41.100602
  CLC： TL627
- Received：02 February 2018，
  
  Revised：14 July 2018，
  
  Published：10 October 2018
- 稿件说明：
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Yunpeng HE, Yuanxia LAO, Sen SUN, et al. Fabrication of CuAlTiWV high entropy alloy film and its helium damage induced by helium co-deposition and annealing[J]. Nuclear techniques, 2018, 41(10): 100602
DOI：

Yunpeng HE, Yuanxia LAO, Sen SUN, et al. Fabrication of CuAlTiWV high entropy alloy film and its helium damage induced by helium co-deposition and annealing[J]. Nuclear techniques, 2018, 41(10): 100602 DOI： 10.11889/j.0253-3219.2018.hjs.41.100602.

摘要

利用磁控溅射技术，在纯Ar和Ar-He混合气氛下制备CuAlTiWV高熵合金薄膜。利用场发射扫描电子显微镜（Field Emission Scanning Electron Microscope，FESEM）、高分辨透射电子显微镜（High ResolutionTransmission Electron Microscope，HRTEM）和X射线衍射仪（X-ray Diffraction，XRD）分别表征了薄膜的微观形貌和相结构，用划痕实验和FESEM研究薄膜的膜基结合强度和失效模型。结果表明：未掺氦且未退火CuAlTiWV高熵合金为非晶相基体上弥散分布着体心立方（Body Centered Cubic，BCC）相和金属间化合物相纳米尺寸粒子的结构。氦的引入和退火处理会影响薄膜的结晶度，但不会改变晶体结构类型。此外氦会使薄膜的表面产生鼓包，膜基界面处产生孔洞，从而使薄膜的临界载荷降低，失效模型由黏着失效转变为内聚失效。

Abstract

Background

Currently

high entropy alloys (HEAs) have attracted increasing interest as structural materials for the development of fusion and Generation-fission reactors due to their high strength and ductility Ⅳ improved fracture toughness

retarded energy dissipation

and suppressed damage accumulation. The accumulation of helium may result in degradation of structural material properties

and affecting the service and safety of the reactor.

Purpose

This study aims to investigate the responses of CuAlTiWV high entropy alloy thin films to helium induced and annealing.

Methods

Helium atoms were introduced in CuAlTiWV high entropy alloy thin films by magnetron sputtering in He/Ar mixed atmosphere. The microstructure and phase composition of the films were characterized by field emission scanning electron microscopy (FESEM)

high resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) respectively. The bond strength and failure mode of the films were confirmed by scratch adhesion test and FESEM.

Results

The microstructure of the CuAlTiWV high entropy alloys without helium infusion and annealing possesses body centered cubic phase and intermetallic compound phase with nano-sized particles diffusely distributed in the amorphous phase matrix. The phase structure of the CuAlTiWV high entropy allay remains stable with helium introduced and annealing whilst helium may change the microstructure and morphology of the films

hence reduce the adhesion properties and modify the failure pattern in scratch test.

Conclusion

This study provides a useful reference for further evaluation of the radiation resistance properties of HEAs and research of HEAs as structural materials for new generation fusion reactors.

关键词

Keywords

references

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