Rayón Encinas, E.; Bonache Bezares, V.; Salvador Moya, MD.; Roa, JJ.; Sánchez, E. (2011). Hardness and Young's modulus distributions in atmospheric plasma sprayed WC-Co coatings using nanoindentation. Surface and Coatings Technology. 205(17):4192-4197. doi:10.1016/j.surfcoat.2011.03.012
Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10251/47361
Title:
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Hardness and Young's modulus distributions in atmospheric plasma sprayed WC-Co coatings using nanoindentation
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Author:
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Rayón Encinas, Emilio
Bonache Bezares, Victoria
Salvador Moya, Mª Dolores
Roa, J. J.
Sánchez, E.
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UPV Unit:
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Universitat Politècnica de València. Departamento de Ingeniería Mecánica y de Materiales - Departament d'Enginyeria Mecànica i de Materials
Universitat Politècnica de València. Instituto de Tecnología de Materiales - Institut de Tecnologia de Materials
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Issued date:
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Abstract:
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A statistical indentation analysis of WC-Co coatings obtained by atmospheric plasma spray (APS) with two secondary plasma gases, H 2 and He, was investigated using an instrumented indentation technique with the aim of ...[+]
A statistical indentation analysis of WC-Co coatings obtained by atmospheric plasma spray (APS) with two secondary plasma gases, H 2 and He, was investigated using an instrumented indentation technique with the aim of correlating the influence of the nanomechanical behaviour of each constituent phase with the micromechanical characteristics of these coatings.X-ray diffraction (XRD) and backscattered electron (BSE) analysis showed that H 2 gas produced a greater decarburisation of the WC phase. The dissolution and decomposition of the WC phase during the process produced a Co+W+C solid solution as binder phase and the formation of W 2C and W as secondary phases. The nanohardness (H) and Young's modulus (E) resulting from a grid of 300 indentations performed at 50nm in depth identified the characteristics of each phase in the heterogeneous structure produced by decarburisation. Statistical study by a CDF fit and Gaussian simulated distributions showed that the mechanical properties of the coatings were governed by the binder phase content, which decreased the possible hardening effect of the arising hardest phases (W 2C and Co+W+C solid solution). © 2011 Elsevier B.V.
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Subjects:
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Carbides
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Cumulative distribution function
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Hardness
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Nanoindentation
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Plasma spray coatings
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Atmospheric plasma spray
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Atmospheric plasmas
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Backscattered electrons
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Binder phase
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Constituent phase
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Gaussians
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Hardening effects
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Heterogeneous structures
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Indentation analysis
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Instrumented indentation technique
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Micro-mechanical
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Secondary phasis
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Secondary plasma
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Simulated distribution
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Statistical study
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WC-Co coating
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XRD
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Young's Modulus
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Binders
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Decarburization
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Dissolution
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Distribution functions
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Elastic moduli
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Elasticity
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Gas fuel analysis
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Hardening
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Mechanical properties
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Plasma jets
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Plasma spraying
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Plasmas
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Protective coatings
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Solid solutions
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Solidification
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Tungsten alloys
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Tungsten carbide
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Sprayed coatings
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Copyrigths:
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Cerrado |
Source:
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Surface and Coatings Technology. (issn:
0257-8972
)
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DOI:
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10.1016/j.surfcoat.2011.03.012
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Publisher:
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Elsevier
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Project ID:
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info:eu-repo/grantAgreement/MEC//MAT2006-12945-C03-02/ES/DESARROLLO Y PROPIEDADES DE RECUBRIMIENTOS DE CERMETS NANOESTRUCTURADOS DE ALTAS PRESTACIONES/ /
info:eu-repo/grantAgreement/Generalitat Valenciana//ACOMP%2F2009%2F221/ES/Desarrollo y propiedades de recubrimientos de cermets nanoestructurados de altas prestaciones/
info:eu-repo/grantAgreement/Generalitat Valenciana//ACOMP%2F2010%2F025/ES/EVALUACION DE PROPIEDADES DE NUEVOS RECUBRIMIENTOS NANOESTRUCTURADOS OBTENIDOS POR PROYECCION POR PLASMA ATOMOSFERICO A PARTIR DE DISOLUCIONES/
info:eu-repo/grantAgreement/MICINN//MAT2009-14144-C03-02/ES/Evaluacion De Propiedades De Nuevos Recubrimientos Nanoestructurados Obtenidos Por Proyeccion Por Plasma Atmosferico A Partir De Disoluciones Y Suspensiones Concentradas De Nanoparticulas/
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Thanks:
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Dr. E. Rayon particularly wishes to thank Marcos Signes for his help and discussion of the results of this study. The work was financially supported by the Spanish Ministry of Science and Innovation (MAT2006-12945-C03-02 ...[+]
Dr. E. Rayon particularly wishes to thank Marcos Signes for his help and discussion of the results of this study. The work was financially supported by the Spanish Ministry of Science and Innovation (MAT2006-12945-C03-02 and MAT2009-14144-C03-02) and the Autonomous Government of Valencia (ACOMP/2009/221 and ACOMP/2010/025).
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Type:
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Artículo
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