Strengthening and Toughening of Microelements (Ti, Zr, C) on Nuclear Fusion Reactor Tungsten - Based Materials View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2014-2016

FUNDING AMOUNT

250000 CNY

ABSTRACT

The development of fusion requires that tungsten-based plasma facing materials (PFM) have high performance, such as high room temperature toughness, high temperature strength, high recrystallization temperature and good irradiation resistance. However, pure tungsten exhibits severe embrittlement in several aspects, including room temperature brittleness, recrystallization brittleness and irradiation-induced brittleness. The low temperature brittleness of tungsten is strongly related to the segregation of trace interstitial impurity elements (O, C, N) on grain boundaries, which forms brittle membrane layer and decreases the bonding strength of grains, and thus results in brittle fracture. Therefore, controlling the distribution and forms of interstitial impurity elements (C, N, O), and strengthening grain boundaries become key points of improving mechanical properties of tungsten.?Therefore, in this project, the W-Zr-Ti-C alloys will be synthesized by spark plasma syntering method and/or microwave sintering method, the interaction between micro-alloying elements (Ti, Zr) and interstitial impurity elements (O, C, N), and the effect of micro-alloying on mechanical properties of tungsten and its mechanism would be studied. More specially, the influence of impurities in the grain boundaries on the mechanical properti More... »

URL

http://npd.nsfc.gov.cn/projectDetail.action?pid=51301164

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