DEVELOPMENT AND CHARACTERIZATION OF ENVIRONMENT FRIENDLY CARBON COATING FOR PISTON RING APPLICATIONS

Abstract

In this thesis, a newly developed environment friendly carbon coating is developed for piston ring application and it would help the researchers to enhance the tribological and mechanical properties. The contents of the thesis are as follows: Chapter 1 In this chapter piston ring wear, surface engineering and thermal spray process techniques have been discussed. Later the details of different types of wear, wear mechanism, and surface modification techniques, for wear reduction of carbon coating have been elaborated. Chapter 2 A comprehensive review of the literature has been discussed with different types of carbon coating, Protective coating, High temperature coating, Role of coating, HVOF process and deposition and tribological condition of HVOF based composite coating. Chapter 3 In this chapter, after reviewing the literature critically, brainstorming with the supervisors and field expert, the research gap and the objectives of the present study have been formulated. The present investigation is mainly focused on the development and characterization of carbon coating for piston ring applications. Chapter 4 This chapter contains a description of the experimental equipment used and the procedures adopted for deposition, characterizations and tribological investigation of the deposited coatings Chapter 5 This chapter includes the characterization, residual stress, micro-hardness, surface roughness and high temperature tribological test of: Part 1: Carbon coating for the piston rings application prepared by HVOF spray technique. Part 2: Carbon based composite coating for the piston rings application prepared by HVOF spray technique. Chapter 6 This chapter includes the comparative analysis of tribological and mechanical properties of carbon coating and carbon based composite coating for piston rings. Chapter 7 This chapter contains salient conclusions. Important conclusions of the investigation regarding carbon and carbon based composite coating have been presented with significant findings have been drawn from performed experimentation followed by future scope of present work.