He+辐照对弥散强化Cu-Y2O3铜合金微观结构演化及性能影响

doi:10.11900/0412.1961.2025.00318

金属学报 DOI: 10.11900/0412.1961.2025.00318

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He⁺辐照对弥散强化Cu-Y₂O₃铜合金微观结构演化及性能影响

马冰¹ 陈子仡¹ 魏军颖¹ 李季霏¹ 张宏鹏² 罗来马^{1, 3} 许杰¹ 刘家琴⁴ 吴玉程¹

1 合肥工业大学材料科学与工程学院合肥 230009

2 中国科学院近代物理研究所先进核能中心兰州 730000

3 合肥工业大学高性能铜合金材料及成形加工教育部工程研究中心合肥 230009

4北京化工大学化学学院北京 100029

Effect of He⁺ Irradiation on the Microstructural Evolution and Properties of the Diffusion-Strengthened Copper Alloy Cu–Y₂O₃

MA Bing¹, CHEN Ziyi¹, WEI Junying¹, LI Jifei¹, ZHANG Hongpeng², LUO Laima^1,3, XU Jie¹, LIU Jiaqin⁴, WU Yucheng¹

1. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
2 Advanced Nuclear Energy Center, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
3 Ministry of Education Engineering Research Center for High-Performance Copper Alloy Materials and Forming Technology, Hefei University of Technology, Hefei 230009, China
4 School of Chemistry, Beijing University of Chemical Technology, Beijing 100029, China

引用本文:

马冰, 陈子仡, 魏军颖, 李季霏, 张宏鹏, 罗来马, 许杰, 刘家琴, 吴玉程. He⁺辐照对弥散强化Cu-Y₂O₃铜合金微观结构演化及性能影响[J]. 金属学报, DOI: 10.11900/0412.1961.2025.00318.

全文: PDF(2076 KB)

摘要: 为了探究类服役工况辐照对Cu-Y₂O₃铜合金的影响，本工作采用机械合金化与放电等离子烧结技术制备Cu-Y₂O₃铜合金，随后在450 ℃下进行高能He⁺辐照，研究He⁺辐照对Cu-Y₂O₃铜合金微观结构演化及性能的影响。结果表明，在高能He⁺辐照作用下Cu-Y₂O₃铜合金内部逐渐出现He泡、位错环等缺陷，随着注量从1.0 × 10¹⁶ ions/cm²增加至1.0 × 10¹⁷ ions/cm²，He泡的平均尺寸由约7.3 nm增长至19.0 nm，He泡的数密度由3.4 × 10²¹ m^-3增加至9.2 × 10²¹ m^-3最后降低至2.6 × 10²¹ m^-3，呈现出先增加后降低的趋势，即在较高注量下以He泡的合并为主。辐照诱导位错环的平均尺寸和总数密度从4.65 nm和6.6 × 10²¹ m^-3分别增加至9.45 nm和8.7 × 10²¹ m^-3，呈现稳步上升的趋势，Cu-Y₂O₃铜合金中位错环在辐照硬化过程中有重要贡献。随着注量的增加，辐照缺陷逐渐趋于饱和，材料硬化也趋于饱和。

关键词 ： Cu-Y?O?合金, 离子辐照, 辐照硬化, 位错环, 氦泡

Abstract：The development of fusion energy is an important direction for meeting future energy demands, and the divertor, as a key component of fusion reactors, operates in harsh service environments characterized by high heat flux and intense radiation. Yttrium oxide powder-reinforced (Cu–Y₂O₃) copper alloy can effectively capture irradiation defects, suppress their aggregation and growth, and enhance the radiation resistance of copper-based materials by introducing highly stable nano-Y₂O₃ particles into the matrix. Therefore, it is urgent to investigate the service performance of the candidate heat sink material Cu–Y₂O₃ under similar working conditions. To investigate the effects of service-like irradiation on Cu–Y₂O₃ copper alloy, this study employed mechanical alloying and spark plasma sintering to prepare the alloy, followed by high-energy He⁺ irradiation at 450°C to examine the effect of irradiation dose on the microstructural evolution and properties of the alloy. The results show that under high-energy He⁺ irradiation, defects such as He bubbles and dislocation loops gradually form within the Cu–Y₂O₃ copper alloy. As the irradiation dose increases from 1.0 × 10¹⁶ to 1.0 × 10¹⁷ ions/cm², the average size of He bubbles increases from approximately 7.3 to 19.0 nm, and the total bubble number density increases from 3.4 × 10²¹ to 9.2 × 10²¹ m⁻³ and finally decreases to 2.6 × 10²¹ m⁻³, showing a trend of initial increase followed by a decrease; that is, the coalescence of He bubbles dominates at high doses. The size and number density of irradiation-induced dislocation loops increase steadily from 4.65 nm and 6.6 × 10²¹ m⁻³ to 9.45 nm and 8.7 × 10²¹ m⁻³, respectively. Dislocation loops are a key contributor to irradiation hardening in Cu–Y₂O₃ copper alloy. As the irradiation dose increases, defects gradually reach saturation, and the material hardening also tends to saturate.

Key words： Cu-Y?O? alloy ion irradiation irradiation hardening dislocation loops helium bubbles

收稿日期: 2025-10-20

基金资助:国家磁约束核聚变能发展研究专项(2022YFE03140000, 2022YFE0314004); 国家自然科学基金(12305301)

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	马冰
	陈子仡
	魏军颖
	李季霏
	张宏鹏
	罗来马
	许杰
	刘家琴
	吴玉程
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https://www.ams.org.cn/CN/Y0/V/I/0

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