1. Microstructure and helium irradiation performance of W–ZrC/Sc2O3 composites prepared spark plasma sintering.
- Author
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Chen, Hong-Yu, Luo, Lai-Ma, Zan, Xiang, Zhu, Xiao-Yong, Cheng, Ji-Gui, Wu, Yu-Cheng, Xu, Qiu, and Liu, Jia-Qin
- Subjects
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MICROSTRUCTURE , *IRRADIATION , *SINTERING , *COMPOSITE materials , *TUNGSTEN - Abstract
W–ZrC composites reinforced with Sc 2 O 3 particles were produced by mechanical milling and subsequent spark plasma sintering. W–ZrC/Sc 2 O 3 composites were exposed to the He ion for 2 h with 50 and 80 eV ion energies and a particle flux of above 10 22 m −2 s −1 performed in a Large-power Materials Irradiation Experiment System (LP-MIES). Results showed that W, Sc 2 O 3 , and ZrC can combine well with one another to form a solid solution. Small amounts of ZrC particles can effectively capture impurity O in tungsten GBs and form nano-sized ZrO 2 particles. After a large He + ion irradiation, serious radiation damage occurred on the sample surfaces, exhibiting “fuzz” structures. With the increasing in He + ion energy from 50 eV to 80 eV, the microhardness of the irradiated regions rose, and pores were formed on the affected area. Besides, agglomerated second-phase groups (primary ZrC with slight Sc 2 O 3 ) tended to distribute outward. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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