Morphology and solid particle erosion wear behavior of red mud composite coatings

Harekrushna Sutar, Subash Chandra Mishra, Santosh Kumar Sahoo, Alok Satapathy, Vikas Kumar

Chemical Engineering Department, National Institute of Technology, Rourkela, India.
Mechanical Engineering Department, National Institute of Technology, Rourkela, India.
Metallurgical and Material Engineering Department, National Institute of Technology, Rourkela, India;.

DOI: 10.4236/ns.2012.411111                

Abstract

In order to understand the tribological behavior of red mud composite coatings, the red mud and composite materials like fly ash, carbon and aluminum are being plasma sprayed. The coatings are investigated to know their morphological behavior and erosion wear characteristics. Plasma spraying is done at different plasma arc current like 200, 250, 300 and 400 amperes. Torch input powers maintained as 6, 9, 12 and 16 KW. The substrates chose are rectangular in shape having a dimension of 50 mm × 25 mm × 2 mm. commercially available aluminum, copper, mild steel and stainless steel being used as substrate. Room temperature solid particle erosion trials are carried out using a compressed air blasting type rig under impact angles of 30^o, 60^o and 90^o. The present investigation uses an erosion apparatus of Sand Blast type. The test is conducted as per ASTMG-76 standards. It is analyzed that initially the cumulative coating mass loss increases rapidly and later on becomes almost stagnant. A transient regime in the erosion process exists, during which the incremental erosion rate decreases monotonically down to a steady state erosion rate.

Keywords

Plasma Spraying; Morphology; Erosion Wear; Red Mud Composite Coatings

Conflicts of Interest

The authors declare no conflicts of interest.

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