Isothermal oxidation resistance comparison between air plasma sprayed, vacuum plasma sprayed and high velocity oxygen fuel sprayed CoNiCrAlY bond coats

Di Ferdinando, Martina and Fossati, Alessio and Lavacchi, Alessandro and Bardi, Ugo and Borgioli, Francesca and Borri, Claudia and Giolli, Carlo and Scrivani, Andrea Isothermal oxidation resistance comparison between air plasma sprayed, vacuum plasma sprayed and high velocity oxygen fuel sprayed CoNiCrAlY bond coats. Surface and Coatings Technology, 204 (15). 2499 - 2503. ISSN 0257-8972 (2010)

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Abstract

Commercial CoNiCrAlY powders with the same chemical composition were sprayed by vacuum plasma spraying (VPS), air plasma spraying (APS) and high velocity oxygen fuel (HVOF) onto Hastelloy X superalloy substrates obtaining coatings of comparable thickness. After coating, samples were maintained at 1273 K in air for different periods up to 3000 h. Morphological, microstructural and compositional analyses were performed in order to assess the high temperature oxidation resistance provided by the different spraying systems. HVOF technique provided bond coats with higher oxidation resistance compared to APS and VPS.

Item Type:	Article
Identification Number:	10.1016/j.surfcoat.2010.01.031
Uncontrolled Keywords:	Thermal barrier coating; Thermal spray processing; Oxidation; Superalloy; Protective coating
Subjects:	Q Science > QD Chemistry T Technology > T Technology (General)
Research Area:	Computer Science and Applications
Depositing User:	Ms T. Iannizzi
Date Deposited:	03 Mar 2014 14:05
Last Modified:	03 Mar 2014 14:05
URI:	http://eprints.imtlucca.it/id/eprint/2168

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