Refractory carbide reinforced tungsten matrix composites

Wang, Yujin; Wang, Dong; Zhang, Taiquan; Song, Guanyu; Chen, Lei; Wei, Boxin; Zhao, Yanwei; Yu, Zhou

doi:10.1016/j.jallcom.2022.166342

Cited by 14 publications

(1 citation statement)

References 204 publications

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“…The detailed SEM–EDS measurements are summarized in Supplementary Materials Section 1 . Similar oxidation phenomena were also reported in other studies of DSW with transition metal carbides, probably due to the high chemical affinity of the carbides to oxygen 5 , 12 , 20 . To maintain consistency, we will continue using the term MC to refer to the dispersoids throughout the article, where ‘M' represents the transition metal element.…”

Section: Resultssupporting

confidence: 88%

Effects of transition metal carbide dispersoids on helium bubble formation in dispersion-strengthened tungsten

Saefan

Liu

Lang

et al. 2023

Sci Rep

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The formation of helium bubbles and subsequent property degradation poses a significant challenge to tungsten as a plasma-facing material in future long-pulse plasma-burning fusion reactors. In this study, we investigated helium bubble formation in dispersion-strengthened tungsten doped with transition metal carbides, including TaC, ZrC, and TiC. Of the three dispersoids, TaC exhibited the highest resistance to helium bubble formation, possibly due to the low vacancy mobility in the Group VB metal carbide and oxide phases. Under identical irradiation conditions, large helium bubbles formed at grain boundaries in tungsten, while no bubbles were observed at the interfaces between the carbide dispersoid and tungsten matrix. Moreover, our results showed the interfaces could suppress helium bubble formation in the nearby tungsten matrix, suggesting that the interfaces are more effective in trapping helium as tiny clusters. Our research provided new insights into optimizing the microstructure of dispersion-strengthened tungsten alloys to enhance their performance.

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Section: Resultssupporting

confidence: 88%