Chromia layer growth on a Ni-based superalloy: Sub-parabolic kinetics and the role of titanium

Funding Agencies|Engineering and Physical Sciences Research Council||Rolls-Royce plc||
Oxidation of the Ni-based superalloy RR1000 has been undertaken in air over the temperature range 600-900 degrees C for times up to 5000 h. The surface oxide consisted of a protective Ti-doped chromia layer but with rutile forming on its outer surface. Sub-surface oxidation of Al and Ti also occurred. The thickening kinetics of the chromia layer were sub-parabolic with initial rates around two orders of magnitude higher than expected for Ti-free chromia. This enhancement and the sub-parabolic kinetics are accounted for by Ti-doping of the chromia layer. Over time the enhancement reduced because of Ti-depletion in the alloy.

Evans, H E.University of Birmingham, England (författare)
Taylor, M P.University of Birmingham, England (författare)
Hardy, M C.Rolls Royce Plc, England (författare)
Stekovic, SvjetlanaLinköpings universitet,Konstruktionsmaterial,Tekniska högskolan(Swepub:liu)svest75 (författare)
University of Birmingham, EnglandRolls Royce Plc, England (creator_code:org_t)

Av författaren/redakt...: Cruchley, S; Evans, H E.; Taylor, M P.; Hardy, M C.; Stekovic, Svjetl ...

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.