Morphological and structural damage investigation of nanostructured molybdenum fuzzy surface after pulsed plasma bombardment

doi:10.1088/1674-1056/ac3395

	Morphological and structural damage investigation of nanostructured molybdenum fuzzy surface after pulsed plasma bombardment
	Luo, Yu-Chuan 2; Yan, Rong 1; Pu, Guo 2; Wang, Hong-Bin 2; Wang, Zhi-Jun 3; Yang, Chi 3; Yang, Li 2; Guo, Heng-Xin 2; Zhou, Zhi-Bing 2; Chen, Bo 2
刊名	CHINESE PHYSICS B
	2022-03-01
卷号	31
关键词	molybdenum nanostructured fuzz pulsed-H plasma edge localized mode etching process
ISSN号	1674-1056
DOI	10.1088/1674-1056/ac3395
通讯作者	Ye, Zong-Biao(zbye@scu.edu.cn) ; Zhang, Kun(kzhang@scu.edu.co)
英文摘要	Steady high-flux helium (He) plasma with energy ranging from 50 eV to 90 eV is used to fabricate a fiber-form nanostructure called fuzz on a polycrystalline molybdenum (Mo) surface. Enhanced hydrogen (H) pulsed plasma in a wide power density range of 12 MW/m(2)-35 MW/m(2) is subsequently used to bombard the fuzzy Mo, thereby simulating the damage of edge localized mode (ELM) to fuzz. The comparisons of surface morphologies, crystalline structures, and optical reflectivity between the original Mo and the Mo treated with various He+ energy and transient power densities are performed. With the increase of He ion energy, the Mo nano-fuzz evolved density is enlarged due to the decrease of filament diameter and optical reflectivity. The fuzz-enhanced He release should be the consequence of crystalline growth and the lattice shrinkage inside the Mo-irradiated layers (similar to 200 nm). The fuzz induced by lower energy experiences more severe melting damage and dust release under the condition of the identical transient H plasma-bombardment. The H and He are less likely to be trapped due to aggravated melting evidenced by the enhanced crystalline size and distinct lattice shrinkage. As the transient power density rises, the thermal effect is enhanced, thereby causing the fuzz melting loss to aggravate and finally to completely disappear when the power density exceeds 21 MW/m(2). Irreversible grain expansion results in huge tensile stress, leading to the observable brittle cracking. The effects of transient thermal load and He ion energy play a crucial role in etching Mo fuzz during ELM transient events.
资助项目	Sichuan Provincial Science and Technology Program, China[2021YFSY0015] ; Sichuan Provincial Science and Technology Program, China[2021YJ0510] ; China Postdoctoral Science Foundation[2019M663487] ; National Natural Science Foundation of China[11905151]
WOS关键词	STEADY-STATE ; TUNGSTEN ; HELIUM ; IMPLANTATION
WOS研究方向	Physics
语种	英语
出版者	IOP Publishing Ltd
WOS记录号	WOS:000777807400001
资助机构	Sichuan Provincial Science and Technology Program, China ; China Postdoctoral Science Foundation ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/128251]
专题	中国科学院合肥物质科学研究院
通讯作者	Ye, Zong-Biao; Zhang, Kun
作者单位	1.Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei 230031, Peoples R China 2.Sichuan Univ, Inst Nucl Sci & Technol, Minist Educ, Key Lab Radiat Phys & Technol, Chengdu 610064, Peoples R China 3.Chengdu Univ, Inst Adv Study, 2025 Chengluo Ave, Chengdu 610106, Peoples R China
推荐引用方式 GB/T 7714	Luo, Yu-Chuan,Yan, Rong,Pu, Guo,et al. Morphological and structural damage investigation of nanostructured molybdenum fuzzy surface after pulsed plasma bombardment[J]. CHINESE PHYSICS B,2022,31.
APA	Luo, Yu-Chuan.,Yan, Rong.,Pu, Guo.,Wang, Hong-Bin.,Wang, Zhi-Jun.,...&Zhang, Kun.(2022).Morphological and structural damage investigation of nanostructured molybdenum fuzzy surface after pulsed plasma bombardment.CHINESE PHYSICS B,31.
MLA	Luo, Yu-Chuan,et al."Morphological and structural damage investigation of nanostructured molybdenum fuzzy surface after pulsed plasma bombardment".CHINESE PHYSICS B 31(2022).