Abstract：
:A wet-chemical method combined with spark plasma sintering was used to prepare a W-Y2O3 alloy. High-temperature tensile tests and nano-indentation microhardness tests were used to characterize the mechanical properties of the alloy. After He-ion irradiation, fuzz and He bubbles were observed on the irradiated surface. The irradiation embrittlement was reflected by the crack indentations formed during the microhardness tests. A phase transformation from α-W to γ-W was investigated by X-ray diffraction (XRD) and transmission electron microscopy (TEM). Polycrystallization and amorphization were also observed in the irradiation damage layer. The W materials tended to exhibit lattice distortion, amorphization, polycrystallization and phase transformation under He-ion irradiation. The transformation mechanism predicted by the atomic lattice model was consistent with the available experimental observations. These findings clarify the mechanism of the structural transition of W under ion irradiation and provide a clue for identifying materials with greater irradiation resistance.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Tan X,Luo L,Chen H,Zhu X,Zan X,Luo G,Chen J,Li P,Cheng J,Liu D,Wu Ydoi
10.1038/srep12755subject
Has Abstractpub_date
2015-07-31 00:00:00pages
12755issn
2045-2322pii
srep12755journal_volume
5pub_type
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