Hardening effect of multi-energy W2+-ion irradiation on tungsten–potassium alloy?

• 作者: Chang-Song Liu Hao Deng Jun Tang Kun Zhang Long-Qing Chen Wen-Bin Qiu Xiao-Liang Yang Yang-Yi-Peng Song
• 来源期刊: 中国物理B（英文版）
• 年，卷（期）: 2020,（10）
• 所属期刊栏目: PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES
• 页码范围: 449-456
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-1056/ab9c09

摘要

Tungsten is one of the most promising plasma-facing materials (PFMs) to be used in the nuclear fusion reactor as divertor material in the future. In this work, W2+-ions bombardment is used to simulate the neutron irradiation damage to commercial pure tungsten (W) and rolled tungsten–potassium (W–K). The 7 MeV of 3×1015 W2+-ions/cm2, 3 MeV of 4.5×1014 W2+, and 2 MeV of 3×1014 W2+-ions/cm2 are applied at 923 K in sequence to produce a uniform region of 100 nm–400 nm beneath the sample surface with the maximum damage value of 11.5 dpa. Nanoindentation is used to inspect the changes in hardness and elastic modulus after self-ion irradiation. Irradiation hardening occurred in both materials. The irradiation hardening of rolled W–K is affected by two factors: one is the absorption of vacancies and interstitial atoms by potassium bubbles, and the other is the interaction between potassium bubbles and dislocations. Under the condition of 11.5 dpa, the capability of defect absorption can reach a threshold. As a result, dislocations finally dominate the hardening of rolled W–K. Specific features of dislocation loops in W–K are further observed by transmission electron microscopy (TEM) to explain the hardening effect. This work might provide valuable enlightenment for W–K alloy as a promising plasma facing material candidate.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	Yang-Yi-Peng Song	中国科学院合肥物质科学研究院	1	0	0.0	0.0
2	Wen-Bin Qiu	中国科学院合肥物质科学研究院	1	0	0.0	0.0
3	Long-Qing Chen	中国科学院合肥物质科学研究院	1	0	0.0	0.0
4	Xiao-Liang Yang	中国科学院合肥物质科学研究院	1	0	0.0	0.0
5	Hao Deng	中国科学院合肥物质科学研究院	1	0	0.0	0.0
6	Chang-Song Liu	中国科学院合肥物质科学研究院	1	0	0.0	0.0
7	Kun Zhang	中国科学院合肥物质科学研究院	1	0	0.0	0.0
8	Jun Tang	中国科学院合肥物质科学研究院	1	0	0.0	0.0