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Abstract
The thermally-induced gallium removal (TIGR) process is capable of removing gallium from oxide powders through the sublimation of Ga 2O at elevated temperatures in a reducing atmosphere. Heat-resistant structural materials typically used in the construction of furnaces and reaction chambers may be susceptible to embrittlement and corrosion in the gallium-rich environment of the TIGR process. The susceptibilities of several heat-resistant structural materials to corrosion in Ga 2O-rich atmospheres are experimentally evaluated. Tungsten and SiC are found to be highly resistant to corrosive attack by Ga 2O at elevated temperatures. Superalloys containing chromium and cobalt as well as a tungsten alloy containing nickel and copper are found susceptible to corrosive attack by gallium.
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