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Influences of substrate temperature on microstructure and corrosion behavior of APS Ni50Ti25Al25 inter-metallic coating |
Sh Khandanjou1, M Ghoranneviss1, Sh Saviz1, M Reza Afshar2 |
1. Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran; 2. Department of Materials Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran |
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Abstract In the present investigation, Ni50Ti25Al25 (at.%) mechanically alloyed powder is deposited on carbon steel substrate. Before the coating process, the substrate is heated to temperature ranging from room temperature to 400℃. The microstructure, porosity, microhardness, adhesion strength, and corrosion behavior of the coating are investigated at different substrate temperatures. Results show that coating porosity is lower on high temperature surface. Microhardness and adhesion strength of the deposition layer on the substrate without preheating have lower values than with preheating. The polarization test result shows that corrosion performance of the coating is dependent on micro cracks and porosities and the increasing of substrate temperature can improve the quality of coating and corrosion performance.
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Received: 25 June 2017
Revised: 23 October 2017
Accepted manuscript online:
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PACS:
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81.15.-z
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(Methods of deposition of films and coatings; film growth and epitaxy)
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68.55.-a
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(Thin film structure and morphology)
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81.70.Bt
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(Mechanical testing, impact tests, static and dynamic loads)
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81.65.-b
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(Surface treatments)
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Corresponding Authors:
Sh Saviz
E-mail: azarabadegan@gmail.com
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About author: 81.15.-z; 68.55.-a; 81.70.Bt; 81.65.-b |
Cite this article:
Sh Khandanjou, M Ghoranneviss, Sh Saviz, M Reza Afshar Influences of substrate temperature on microstructure and corrosion behavior of APS Ni50Ti25Al25 inter-metallic coating 2018 Chin. Phys. B 27 028104
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