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| Abstract No.: |
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Scheduled at:
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Friday, May 06, 2022, Hall -2.32/33 10:00 AM
Wear Protection II
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| Title: |
Thermal spraying Ni-P cladded diamond powders for improved tribological applications
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| Authors: |
Sribalaji Mathiyalagan* / University West, Sweden
Matteo Rossetti / Università di Modena e Reggio Emilia, Italy
Stefan Björklund/ University West, Sweden
Shrikant Joshi/ University West, Sweden
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| Abstract: |
This paper explores thermal spraying of diamond particles cladded with Ni-P to realize high-performance tribological coatings, which has received little attention so far. High velocity air fuel spraying (HVAF), oxy-fuel combustion flame spraying, and atmospheric plasma spraying (APS) were all used to investigate the role of temperature to which the feedstock is exposed on coating properties. Effect of different nozzle configurations on microstructure, mechanical properties and sliding wear performance were investigated. It is demonstrated that intensity of diamond fragmentation and the extent of diamond retention are governed by the process conditions. Results also suggest that choice of appropriate process parameters can eliminate need for any annealing as typical employed in case of electodeposited Ni-P-diamond coatings. Further, the retention of more diamond particles was observed to play a vital role in determining wear resistance. SEM investigation of wear tracks revealed very mild abrasive wear in case of the coatings with high retention of diamond particles. The results ensuing from this work could lay the foundation for realizing a new generation of thermal sprayed wear resistant metal-diamond composite coatings for diverse applications.
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