Characterization of Thermo-Mechanical Properties for Thermal Sprayed NiCoCrAlY Coatings

0346633 - ÚFP 2011 RIV DE eng C - Conference Paper (international conference)
Fasth, A. - Nylén, P. - Markocsan, N. - Mušálek, Radek
Characterization of Thermo-Mechanical Properties for Thermal Sprayed NiCoCrAlY Coatings.
ITSC 2010 – International Thermal Spray Conference & Exposition: Conference Proceedings. Düsseldorf: DVS Media GmbH, 2010, s. 431-435. ITSC. ISBN 978-3-87155-590-9.
[ITSC 2010 – International Thermal Spray Conference & Exposition. Singapore (SG), 03.05.2010-05.05.2010]
R&D Projects: GA MŠMT ME 901
Institutional research plan: CEZ:AV0Z20430508
Keywords : APS coatings * HVOF and laser glazed coatings * influence of spray parameters * bond layer * stiffness * fatigue and fracture
Subject RIV: JI - Composite Materials
http://asmcommunity.asminternational.org/content/Events/ITSC/

The thermo-mechanical properties of a thermal barrier bond coat (BC) play an important role in governing the life-time of a coating system. The presented work aims to determine these properties for NiCoCrAlY coatings sprayed on Hastelloy X substrates sprayed under different process conditions. Temperature dependent Young’s modulus values are determined for both Atmospheric Plasma Sprayed (APS) and HVOF sprayed coatings using the four-point bending test. Particular attention is paid to microstructure-property relationships during heating. Young´s modulus was determined up to 950°C and evaluated for coatings loaded in both tension and compression. Results are discussed in the context of the effect of feedstock material, process conditions and microstructure characteristics. The methods and results presented are attractive, particularly for the thermal spray industry, since these properties are a prerequisite when the BC is to be considered in component design.
Permanent Link: http://hdl.handle.net/11104/0187605