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Title: Microstructure and Mechanical Properties of Microwave Post-processed Ni Coating
Authors: Zafar S.
Sharma, Apurbba Kumar
Published in: Journal of Materials Engineering and Performance
Abstract: Flame-sprayed coatings are widely used in the industries attributed to their low cost and simple processing. However, the presence of porosity and poor adhesion with the substrate requires suitable post-processing of the as-sprayed deposits. In the present work, post-processing of the flame-sprayed Ni-based coating has been successfully attempted using microwave hybrid heating. Microwave post-processing of the flame-sprayed coatings was carried out at 2.45 GHz in a 1 kW multimode industrial microwave applicator. The microwave-processed and as-sprayed deposits were characterized for their microstructure, porosity, fracture toughness and surface roughness. The properties of the coatings were correlated with their abrasive wear behavior using a sliding abrasion test on a pin-on-disk tribometer. Microwave post-processing led to healed micropores and microcracks, thus causing homogenization of the microstructure in the coating layer. Therefore, microwave post-processed coating layer exhibits improved mechanical and tribological properties compared to the as-sprayed coating layer. © 2017, ASM International.
Citation: Journal of Materials Engineering and Performance, 26(3): 1382-1390
Issue Date: 2017
Publisher: Springer New York LLC
Keywords: abrasive wear
Ni coatings
thermal spraying
ISSN: 10599495
Author Scopus IDs: 56345797700
Author Affiliations: Zafar, S., School of Engineering, Indian Institute of Technology Mandi, Kamand, Mandi, 175005, India
Sharma, A.K., Mechanical and Industrial Engineering Department, Indian Institute of Technology Roorkee, Roorkee, 247667, India
Funding Details: 
Corresponding Author: Sharma, A.K.; Mechanical and Industrial Engineering Department, India; email:
Appears in Collections:Journal Publications [ME]

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