The effects of beryllium additions on the oxidation of nickel aluminide and titanium aluminide based intermetallics | Zendy

R.J. Jr. Hanrahan | Zendy; Katherine Chen | Zendy; Michael P. Brady | Zendy

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The effects of beryllium additions on the oxidation of nickel aluminide and titanium aluminide based intermetallics

Author(s) -

R.J. Jr. Hanrahan,

Katherine Chen,

Michael P. Brady

Publication year - 1998

Language(s) - English

Resource type - Reports

DOI - 10.2172/307984

Subject(s) - spinel , nial , materials science , nickel aluminide , titanium aluminide , metallurgy , beryllium , intermetallic , laves phase , aluminide , nickel , phase (matter) , titanium , alloy , chemistry , organic chemistry

The effects of Be additions on the oxidation behavior of {beta}-NiAl in moist air at 1,000 C and borderline alumina-forming {gamma} (TiAl) + Laves Ti-Al-Cr based alloys at 800 C and 1,000 C in dry and moist air were investigated. The addition of Be to {beta}-NiAl suppressed the formation of transient alumina, and resulted in the formation of a protective BeAl{sub 2}O{sub 4} spinel phase. In dry air, the addition of Be to the Ti-Al-Cr alloys also resulted in the formation of a protective BeAl{sub 2}O{sub 4} spinel phase. In moist air, only Ti-Al-Cr-Be alloys with a high Cr content (10 to 15 a/o) formed the protective BeAl{sub 2}O{sub 4} scale

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