New results on the oxidation and hot corrosion of silicide overlay coatings on nickel-based alloys
1981; Elsevier BV; Volume: 84; Issue: 1 Linguagem: Inglês
10.1016/0040-6090(81)90018-3
ISSN1879-2731
AutoresJ. Daimer, E. Fitzer, J. Schlichting,
Tópico(s)Semiconductor materials and interfaces
ResumoAbstract Silicon-containing coatings with a matrix consisting of the saturated γ solid solution Ni6Cr2Si2 and which also contain intermetallics of complex tantalum silicides as precipitates show great promise as protective layers for nickel-based alloys with improved oxidation and hot corrosion resistance. We present results of oxidation tests performed at 1000°C for up to 4000 h in air and of hot corrosion tests in burner gas with intermediate dipping in Na2SO4 and V2O5 melts. From silicon diffusion data, lifetimes greater than 10 000 h at 1000°C can be expected.
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