Neutron diffraction residual strain measurements in alumina coatings deposited via APS and HVOF techniques

Rehan Ahmed, Nadimul Haque Faisal, Robert Lewis Reuben, Anna M Paradowska, Michael E Fitzpatrick, J Kitamura, S Osawa

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Abstract

Residual strains in air plasma sprayed (APS) and high velocity oxy-fuel (HVOF) alumina (Al(2)O(3)) coatings were investigated by means of neutron diffraction technique. Results of this investigation conclude that through thickness residual strain in the APS coating was mainly tensile whereas the HVOF coating had both compressive and tensile residual strain. Further analysis of Vickers indentation fracture behaviour using acoustic emission (AE) technique concluded that the nature and magnitude of these residual strain fields had a direct effect on the fracture response of two coatings during the indentation process.

Original languageEnglish
Article number012051
Number of pages4
JournalJournal of Physics: Conference Series
Volume251
Issue number1
DOIs
Publication statusPublished - 2010
EventInternational Conference on Neutron Scattering 2009 - Knoxville, TN, United States
Duration: 3 May 20097 May 2009

Keywords

  • SPRAY CERMET COATINGS

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