Microstructural Effects of Y2O3 and TiC Additions in Tungsten View Full Text


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Article Info

DATE

2021-04-13

AUTHORS

Zhisheng Yan, Yina Huang, Yucheng Wu, Laima Luo, Lukas A. Saul, Gang Yao

ABSTRACT

Tungsten is a prime candidate for plasma facing materials (PFM) of internal components in fusion reactors due to its high thermal conductivity, high melting point and low sputtering yield. However, the brittleness of W at low temperature and the embrittlement caused by recrystallization and irradiation is a concern for this application of W engineering. To improve the properties, a modified W by the addition of a dispersion agent is introduced. The existence of dispersoids such as oxides (Y2O3, La2O3) or carbides (TiC, ZrC, HfC, Ta2C) helps to improve the mechanical properties and migration of grain boundaries therefore suppressing the embrittlement. In this work, three types of dispersion modified W are processed: W–Y2O3, W–TiC and W–TiC–Y2O3. The materials are fabricated with novel wet chemical method followed by consolidation through spark plasma sintering (SPS). The microhardness and microstructure are studied in this work. Dispersoids’density, size, distribution, crystal structure as well as composition are also investigated. A range of characterization techniques is applied, including metallography microscopy, scanning electron microscopy, transmission electron microscopy and energy dispersive spectroscopy. More... »

PAGES

9

Identifiers

URI

http://scigraph.springernature.com/pub.10.1007/s10894-021-00295-4

DOI

http://dx.doi.org/10.1007/s10894-021-00295-4

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1137145133


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