Effect of Fly Ash and Carbon Reinforcement on Dry Sliding Wear Behaviour of Red Mud

Harekrushna Sutar,Debashis Roy,Subash Chandra Mishra

doi:10.1155/2015/296324

Abstract

This paper explains the sliding wear performance of red mud, fly ash, and carbon composite coating on mild steel. The complex mixture of red mud, fly ash, and carbon is plasma sprayed at 9 kW operating power level. The coatings are examined to study the coating morphology, XRD phase transformation, wear rate, and wear morphology. Wear rate (in terms of cumulative mass loss) with sliding time has been demonstrated in the study. At first pure red mud is plasma coated to observe the coating characteristics and then compounded with 20% carbon, 30% carbon, and 20% carbon + 30% fly ash, separately by weight and sliding wear test conducted using pin on disc wear tester. The trial was performed at fixed track diameter of 100 mm and at sliding speed of 100 rpm (0.523 m/s) at a load of 30 N. The results are compared. Declined cumulative mass loss by inclusion of fly ash and carbon is seen. This might be due to augmented interfacial tension and dense film build-up at boundary layer.

Highlights

In the present scenario coating technologies manifest a promising momentum for emerging materials
This might be due to addition of carbon and fly ash to red mud resulting in improved bond strength and interfacial tension of the coating layer to the substrate border line by forming a denser film
The above work attempted to study the dry sliding wear behaviour of red mud compounded with a limited extent of reinforcement of carbon and fly ash

Summary

Introduction

In the present scenario coating technologies manifest a promising momentum for emerging materials. Wear resistive coatings are claimed to be better tribological applications. Surface modification by improving wear resistance is most widely adopted by plasma spraying technique, which could affirm a great versatility and its application to a wide spectrum of materials. Friction and dry sliding wear behavior of red mud filled banana fibre reinforced unsaturated polyester composites using Taguchi approach reported in [3]. Examinations on the basis of the wear behaviour of Mo and Mo + NiCrBSi thermally sprayed coatings being performed for the application as generation ring face coatings [6]. Plasma sprayed ceramic coatings portrayed favorable tribological performance at high temperatures [7], showed high wear resistance [8], and were easy to be lubricated owing to the oil storage in pores of coatings [9]. It is necessary to mention here that red mud in present decade

C Spectrum 1

Experimental

Analysis and Discussion

Conclusion