摘要
Tungsten(W)as plasma facing material(PFM)needs to face an unprecedented harsh environment in the fusion reactor,which puts forward high requirements for its radiation tolerance.Among the many challenges,the rapid accumulation of helium(He)atoms to form numerous bubbles or even“fuzzy”nanostructure leads to swelling and embrittlement of W matrix and seriously shorten its service life,which is one of the most serious problems faced by PFM-W at present.In this review,we summarize the recent works on the nanochannel W films with high surface-to-volume ratio deposited by magnetron sputter-ing,and the behaviors of He in the nanochannel W films at different fusion-related irradiation environment.Experimental and simulation results showed that the nanochannel W films have better radiation tolerance performance in managing He behaviors than that of commercial bulk W.
基金
financially supported by the National Natural Science Fund for Excellent Young Scholars (Grant No. 11522543)
the National Natural Science Foundation of China (Grant Nos. 11905058,11935011 and 11475129)
the Natural Science Foundation of Hubei Province,China (Grant Nos. 2020CFA041 and 2016CFA080)
the Fundamental Research Funds for the Central Universities
