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Title: Wettability, Thermal and Sliding Behavior of Thermally Sprayed Fly Ash Premixed Red Mud Coatings on Mild Steel
Authors: Sutar, Harekrushna
Mishra, Birupakshya
Murmu, Rabiranjan
Patra, Sangram
Patra, Sarat Chandra
Mishra, Subash Chandra
Roy, Debashis
Keywords: Red Mud
Sliding Wear
Contact Angle
Fly Ash
Issue Date: Dec-2019
Publisher: Scientific Research Publishing Inc.
Citation: Materials Sciences and Applications, 2020, 11, 12-26
Abstract: The present experimental work reveals the surface characteristics like wettability, thermal and sliding wear behaviour of plasma-sprayed red mud (RM) coatings premixed with fly ash (FA). Varying weight % of FA (10, 20, 30 and 40)—RM composite powder is used as precursor for coating. Atmospheric plasma-sprayed coatings are developed at different operating power like 5 kW, 10 kW, 15 kW and 20 kW separately on mild steel substrate. Tribological behaviour viz. sliding wear properties are studied at distinct operating load (10N, 15N, 20N, 25N), speed (40 rpm, 50 rpm, 60 rpm, 70 rpm) and track diameter of 100 mm using a pin on disc tribometer for duration of 30 minutes with 3 minute gap period for each experiment. The DSC and TGA experiments of the coatings are performed to understand the high temperature application areas. The contact angle result signifies the wettability of the prepared coatings is principally a function of composition. The reaction of surface roughness and spraying power is insignificant on water contact angle (WCA). In conclusion, the sliding wear experiments are optimized by Taguchi method to ascertain the influencing parameter on wear.
Description: Materials Sciences and Applications, 2020, 11, 12-26
ISSN: 2153-1188
Appears in Collections:Journal Articles

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