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Microstructural, Surface Topology and Nanomechanical Characterization of Electrodeposited Ni-P/SiC Nanocomposite Coatings
Center for Research and Technology - Hellas, Thessaloniki, Institute for Bio-Economy and Agri-Technology, Thessaloniki, Greece.
Center for Research and Technology - Hellas, Thessaloniki, Institute for Bio-Economy and Agri-Technology, Thessaloniki, Greece and School of Science and Technology, International Hellenic University, Thessaloniki, Greece.
Center for Research and Technology - Hellas, Thessaloniki, Institute for Bio-Economy and Agri-Technology, Thessaloniki, Greece and Department of Materials Science and Engineering, University of Ioannina, Ioannina, Greece.
Center for Research and Technology - Hellas, Thessaloniki, Institute for Bio-Economy and Agri-Technology, Thessaloniki, Greece.
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2019 (English)In: Applied Sciences, E-ISSN 2076-3417, Vol. 9, no 14, article id 2901Article in journal (Refereed) Published
Abstract [en]

In the present study, nickel phosphorous alloys (Ni-P) and Ni-P/ silicon carbide (SiC) nanocomposite coatings were deposited by electrodeposition on steel substrates in order for their microstructural properties to be assessed while using SEM, XRD, and three-dimensional (3D) profilometry as well as nanoindentation. The amorphisation of the as-plated coatings was observed in all cases, whereas subsequent heat treatment induced crystallization and Ni3P intermetallic phase precipitation. Examination of the surface topology revealed that the surface roughness follows the deposition characteristics and heat treatment induced microstructural changes. Additionally, substantial improvements in mechanical properties, including hardness, yield stress, and elasticity modulus, were obtained for the Ni-P, Ni-P/SiC nanocomposites when heat treated as seen from the nanoindentation results. A Finite Element Analysis (FEA) was developed to simulate the nanoindentation tests that enable the precise extraction of the Ni-P and Ni-P/SiC nanocomposite coatings’ stress-strain behavior. It is shown that the correlation between the nanoindentation tests and the computational models was satisfactory, while the stress-strain curves revealed higher yield points for the heat-treated samples.

Place, publisher, year, edition, pages
MDPI, 2019. Vol. 9, no 14, article id 2901
Keywords [en]
Nanocomposite coatings, Electrodeposition, Nickel-phosphorus, SiC nanoparticles, Hardness, Finite Element Analysis
National Category
Other Materials Engineering
Identifiers
URN: urn:nbn:se:hj:diva-46429DOI: 10.3390/app9142901ISI: 000479026900126Scopus ID: 2-s2.0-85074378166Local ID: POA JTH 2019;JTHMaterialISOAI: oai:DiVA.org:hj-46429DiVA, id: diva2:1357113
Available from: 2019-10-03 Created: 2019-10-03 Last updated: 2019-11-12Bibliographically approved

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Ahmadkhaniha, DonyaZanella, Caterina

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