Comprehensive study of wear characteristics of alumina and Titanium Nitride ceramics against AISI 5140 steel under dry lubricated conditions

Abstract

Ceramics coatings are generally used to enhance the surface property of the materials in order to perform in wear and sliding environment to provide resistance against wear. Titanium Nitride and alumina coatings are deposited by using thermal spray techniques with a thickness of 110µm over the AISI 5140 steel surface. The tribological studies were performed under the condition of 10-30Nl loads and a sliding speed of 1-3 m/s, while a constant relative humidity of 30% was maintained. The result showed that the alumina coating on the AISI 5140 steel substrate offered better tribological properties than the other coating material. The wear performance of both uncoated and coated steel substrate samples were analyzed and then compared by using FESEM with EDS instruments.