Efficacy of thermal barrier coated superalloy used in turbines

Ray, Ashok K and Goswami, B and Kumar, S B and Das, D K (2008) Efficacy of thermal barrier coated superalloy used in turbines. In: Remaining life assessment of aged components in thermal power plants and petrochemical industries. NML, Jamshedpur, pp. 1-29. ISBN 81-87053-73-1

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The life of thermal barrier coating prior to spallation is dominated by micro cracking in both the thermally grown oxide and the yttria stabilized zirconia top coat. The damage generated by this microcracking is expected to be a primary life-limiting factor. High temperature force controlled fatigue testing of thermal barrier coated (TBC), bond coated only and bare Superni C263 superalloy, employed for manufacturing the combustion chamber of aero turbines, were conducted in air. Additionally, several accelerated creep tests on the TBC coated and on the bare Supemi C263 alloy were carried out in air.

Item Type:Book or NML Publication
Uncontrolled Keywords:Thermal barrier coating; Fatigue; Superalloy; Bond coat; Substrate endurence; Stress; Crack growth; Creep; Transgranular; Intergranular; Oxidation; Spallation
Divisions:Material Science and Technology
ID Code:1859
Deposited On:05 Oct 2010 11:18
Last Modified:06 Jan 2012 11:46
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