Title

Degradation Of (Ni,Pt)Al Coatings By Mixture Of Sodium And Potassium Sulfate At 950°C

Abstract

Environmental stability of β-(Ni,Pt)Al coatings due to combustion by-product of fuel impurities has been examined owing to recent interests in bio-derived (e.g., algae-derived) fuels. Pure sodium sulfates (Na 2SO4), potassium sulfates (K2SO4) and three of their mixtures with different weight ratio were prepared by mechanically grinding, and their high temperature interactions with diffusional Pt-modified β-NiAl coatings were investigated in a laboratory furnace at 950°C. The corroded samples were characterized by X-ray diffraction and scanning electron microscopy equipped with X-ray energy dispersive spectroscopy. The results showed severe damages occurred in the β-(Ni,Pt)Al coatings when the salts were in molten state at 950°C via fluxing mechanism, and accelerated oxidation also occurred when the pure solid state K 2SO4 was in contact with β-(Ni,Pt)Al.

Publication Date

4-8-2013

Publication Title

Ceramic Engineering and Science Proceedings

Volume

33

Issue

3

Number of Pages

67-76

Document Type

Article; Proceedings Paper

Personal Identifier

scopus

Socpus ID

84875742635 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84875742635

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