Microstructures and properties of thermal barrier coatings deposited by hybrid water-stabilized plasma torch

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F19%3A00555655" target="_blank" >RIV/61389021:_____/19:00555655 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Microstructures and properties of thermal barrier coatings deposited by hybrid water-stabilized plasma torch

Original language description

Hybrid Water-Stabilized Plasma (WSP-H) torch provides high-enthalpy plasma which may be utilized for high-throughput and yet economical spraying of coatings from powders, suspensions, and solutions. It was previously demonstrated that microstructures and functional properties of the WSP-H coatings may be tailored to a wide extent for various new applications, namely those requiring high coating thickness and/or coating of large components. In this study, applicability of WSP-H technology for spraying of novel thermal barrier coatings (TBCs) is demonstrated. WSP-H technology was used for spraying of yttria-stabilized zirconia (YSZ) top-coats from powder, suspension and solution. Yttria content in the top-coat feedstock was 7-8 wt.%. NiCrAlY bond-coat was also sprayed by WSP-H and Hastelloy-X alloy was used as substrate material. Microstructure, phase composition, and endurance of the deposited coatings in thermal cycling fatigue (TCF) test were evaluated. Each thermal cycle consisted of rapid heating to 1100 °C, followed by one hour dwell and rapid cooling. All coatings showed excellent stability and TCF resistance withstanding more than 700 cycles surpassing in TCF test some of the currently commercially used TBCs. Lifetime of TBC with columnar top-coat deposited from suspension exceeded even more than 900 cycles.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20506 - Coating and films

Project

<a href="/en/project/GA19-10246S" target="_blank" >GA19-10246S: Deposition mechanisms and properties of multiphase plasma sprayed coatings prepared with liquid feedstocks</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Proceedings of the International Thermal Spray Conference

ISBN

978-1-62708-242-6

ISSN

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e-ISSN

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Number of pages

8

Pages from-to

738-745

Publisher name

ASM International

Place of publication

Materials Park

Event location

Yokohama

Event date

May 26, 2019

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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