Influence of 2 (wt%) titanium addition on the oxidation resistance of tungsten. (June 2022)

• Record Type: Journal Article
• Authors: Pérez, P.; Monge, M.A.
• Is Part Of: Nuclear materials and energy. Volume 31(2022)
• Publication Date: 2022-06
• Subjects: Tungsten -- Tungsten oxide -- Titanium alloying -- High-temperature oxidation; Nuclear energy -- Periodicals; Nuclear fuels -- Periodicals; Nuclear reactors -- Materials -- Periodicals; Radioactive substances -- Periodicals; 621.4833
• DOI: 10.1016/j.nme.2022.101172
• Languages: English
• ISSNs: 2352-1791

Abstract

Highlights: Oxidation kinetics of W-2Ti (wt%) alloy was evaluated in dry air from 600 °C to 800 °C for 100 h. Addition of titanium changes the microstructure of the oxide layer compared to pure W. Major influence of titanium regards the suppression of massive microcracking in the scale. Additions of a 2 wt% of Ti greatly reduces oxidation kinetics at 700 °C compared to pure W. Abstract: The oxidation behaviour of W-2Ti (wt%) alloy has been evaluated in dry air at 600, 700 and 800 °C for 100 h and the kinetics compared with those for pure tungsten. Titanium addition exerts a beneficial effect on the oxidation resistance of pure tungsten. The mass gain is almost five times smaller than in the case of commercial tungsten and three times smaller than that of tungsten prepared by powder metallurgy at 600 °C. This effect is even higher at 700 and 800 °C, where the titanium addition suppresses catastrophic oxidation of pure tungsten. Major influence of titanium regards the suppression of massive microcracking in the scale, avoiding the development of the typical non-protective multilayered scale pattern formed on pure tungsten.