DUAL MODE FRACTURE BASED ON LOADING RATE DURING SLIDING INDENTATION OF Si-C-N HARD COATINGS ON 304SS SUBSTRATES
AbstractScratch tests were performed on thermal resistant hard Si-C-N coatings deposited on steel (SS) 304, by RF (Radio frequency) magnetron sputtering. The abrasion and wear properties were studied by analyzing the changing failure complexion inside the scratch showing a mixture of ductile and brittle properties The change in loading rate caused noticeable changes in the failure mode. The plasticity was found to have a peripheral domination initially with increase in load but was replaced by brittle failure on increasing the loading rate. The work of adhesion and wear rate were determined.