Hot corrosion behavior of solution precursor and atmospheric plasma sprayed thermal barrier coatings

• Hot corrosion behavior of solution precursor plasma spray (SPPS) thermal barrier coating (TBC) in molten salt mixtures of 90wt.% Na2SO4+5wt.% V2O5+5wt.% NaCl and 50wt.% Na2SO4+50wt.% V2O5 at 900°C is compared vis-à-vis atmospheric plasma spray (APS) coating. APS TBCs show better hot corrosion resistance than SPPS TBCs in both the salt mixtures. The vertical cracks in SPPS coatings, meant for strain tolerance and high thermal cycling life, serve as channels for transporting salts across the coating to bond coat/top coat interface and accelerate failure. © 2015 Elsevier Ltd.

Ämnesord

TEKNIK OCH TEKNOLOGIER  -- Materialteknik -- Annan materialteknik (hsv//swe)

ENGINEERING AND TECHNOLOGY  -- Materials Engineering -- Other Materials Engineering (hsv//eng)

Nyckelord

Ceramic

Hot corrosion

SEM

Superalloys

XRD

Coatings

Corrosion

Corrosion resistance

Corrosive effects

Mixtures

Plasma jets

Plasma spraying

Salt deposits

Sprayed coatings

Surface plasmon resonance

A. Ceramic

Atmospheric plasma spray

Atmospheric plasmas

Hot corrosion resistance

Molten salt mixtures

Thermal barrier coating (TBC)

Thermal barrier coatings

Publikations- och innehållstyp

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