Nanocrystalline W-based alloys with ultrahigh hardness and exceptional irradiation tolerance

Wu, Z. M.1; Zhang, J.2,3; Huang, J. C.3; Fan, Y.1; Yu, X. H.4; Zhao, Y. B.1; Zhu, J. L.2,5; Jin, C. Q.4; Wang, P.6; Fu, E. G.1

2019-10

10.1088/1741-4326/ab34c8

NUCLEAR FUSION   影响因子和分区

0029-5515

1741-4326

Nanocrystalline W-5 wt.% Y2O3 (WYO) with an average grain size of 10 nm and W-5 wt.% Y2O3-2.5 wt.% Ni (WYON) with an average grain size of 85 nm were successfully fabricated for the first time using a high-energy ball-milling method followed by a resistance sintering under ultrahigh pressure (RSUHP) technique. Investigation of the microstructure of sintered WYO shows that the intergranular doping of Y2O3 grains inhibits the grain growth of W, and investigation of the microstructure of sintered WYON shows that the addition of Ni atoms leads to the grain growth and density increase. The Vickers hardness of sintered WYO and sintered WYON is much higher than that of ITER grade W. The He bubble areal density and swelling of WYO and WYON are much lower than those of ITER grade W, indicating that WYO and WYON possess exceptional higher irradiation tolerance in terms of He ion damage than coarse-grained ITER grade W. This study demonstrates the promising applications of nanocrystallined W-based alloys as plasma-facing materials (PFMs) due to their ultrahigh hardness and excellent radiation tolerance.

nanocrystalline tungsten ultrahigh hardness grain boundaries irradiation tolerance He bubble

SCI ; EI

英语

其他

Foundation of China (NSFC)[11575288] ; Foundation of China (NSFC)[51402350] ; Foundation of China (NSFC)[11375018] ; Foundation of China (NSFC)[11528508]

Physics

Physics, Fluids & Plasmas

WOS:000485674000001

IOP PUBLISHING LTD

20193907480622

Ball milling ; Grain boundaries ; Grain growth ; Grain size and shape ; Helium ; Irradiation ; Nanocrystals ; Nickel ; Sintering ; Swelling ; Textures ; Tungsten alloys ; Vickers hardness

Tungsten and Alloys:543.5 ; Nickel:548.1 ; Nanotechnology:761 ; Chemical Operations:802.3 ; Chemical Products Generally:804 ; Crystal Growth:933.1.2 ; Materials Science:951

PHYSICS

Web of Science

1.Peking Univ, Sch Phys, State Key Lab Nucl Phy & Technol, Beijing 100871, Peoples R China
2.Ctr High Pressure Sci & Technol Adv Res HPSTAR, Beijing 100094, Peoples R China
3.Xiamen Univ, Coll Energy, Xiamen 361100, Fujian, Peoples R China
4.Chinese Acad Sci, Inst Phys, Beijing 100190, Peoples R China
5.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
6.Chinese Acad Sci, Lanzhou Inst Chem Phys, Lanzhou 730000, Gansu, Peoples R China

Wu, Z. M.,Zhang, J.,Huang, J. C.,et al. Nanocrystalline W-based alloys with ultrahigh hardness and exceptional irradiation tolerance[J]. NUCLEAR FUSION,2019,59(10).

Wu, Z. M..,Zhang, J..,Huang, J. C..,Fan, Y..,Yu, X. H..,...&Fu, E. G..(2019).Nanocrystalline W-based alloys with ultrahigh hardness and exceptional irradiation tolerance.NUCLEAR FUSION,59(10).

Wu, Z. M.,et al."Nanocrystalline W-based alloys with ultrahigh hardness and exceptional irradiation tolerance".NUCLEAR FUSION 59.10(2019).