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Influence of 1 and 5 wt% TiC additions on the oxidation behaviour of pure tungsten

AuthorsPérez Zubiaur, Pablo; Monge, M.A.; Muñoz, A. ; Adeva, Paloma
Oxidation resistance
Reinforced materials
Titanium carbide
Issue Date2020
CitationNuclear Materials and Energy 24: 100780 (2020)
AbstractThe influence of 1 and 5 wt% of TiC nanoparticles on the oxidation behaviour of reinforced tungsten has been evaluated up to 700 °C in dry air. Isothermal thermogravimetric tests prove that the addition of 5 wt% of TiC particles is detrimental, increasing the mass gain of pure tungsten by a factor of ten. TiC particles act as stress concentrators, facilitating microcracking events within the scale and promoting decohesion between TiC-free boundaries and TiC-containing regions of the material. Compared to pure tungsten, lowering TiC addition to 1 wt% significantly improves the oxidation resistance at 700 °C by reducing about seven times the mass gain, while at 600 °C both materials exhibit similar resistance. At 700 °C, the presence of 1 wt% of TiC particles inhibits massive microcracking events occurring in the scale formed on pure tungsten, rendering the oxide scale denser and more protective.
Publisher version (URL)https://doi.org/10.1016/j.nme.2020.100780
Identifiersdoi: 10.1016/j.nme.2020.100780
issn: 2352-1791
Appears in Collections:(CENIM) Artículos
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