Mechanical properties and oxidation resistance of plasma-sprayed multilayered Al2O3/ZrO2 thermal barrier coatings

Coupled with functionally graded materials (FGM) concept, Al2O3 was proposed as a potential candidate as an interlayer to improve the oxidation resistance of thermal barrier coating (TBC) system due to its low oxygen diffusivity. Plasma spray process was utilized to produce Al2O3/ZrO2 functionally g...

Full description

Saved in:
Bibliographic Details
Published in:Surface & coatings technology 2005-07, Vol.197 (1), p.93-102
Main Authors: LIMARGA, Andi M, WIDJAJA, Sujanto, TICK HON YIP
Format: Article
Language:English
Subjects:
Applied sciences
Corrosion
Corrosion environments
Exact sciences and technology
Mechanical properties and methods of testing. Rheology. Fracture mechanics. Tribology
Metals. Metallurgy
Nonmetallic coatings
Production techniques
Surface treatment
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Coupled with functionally graded materials (FGM) concept, Al2O3 was proposed as a potential candidate as an interlayer to improve the oxidation resistance of thermal barrier coating (TBC) system due to its low oxygen diffusivity. Plasma spray process was utilized to produce Al2O3/ZrO2 functionally graded thermal barrier coating (FG-TBC). This article discusses physical and mechanical properties, thermal behavior, and high-temperature oxidation resistance of the FG-TBC system as compared to a typical duplex TBC system. The results showed that the proposed FG systems exhibit superior mechanical properties and oxidation resistance at the expense of a slightly lower thermal insulating effect. Thin interlayer is preferred in order to minimize the detrimental effect of phase transformation of *-Al2O3 to alpha-Al2O3 that results in tensile residual stresses at the interface. [Substrate: IN718].
ISSN:0257-8972
DOI:10.1016/j.surfcoat.2005.02.087