Output details

Effect of Temperature and Counterface on the Tribological Performance of W-DLC on a Steel Substrate

Diamond-like carbon coatings are used in automotive applications to reduce friction and wear and decrease emissions of CO2 and other gases. The problem addressed is that tribological testing of these coatings is normally performed at room temperature whereas in the engine, the temperatures are typically ~100˚C. This is the first paper to quantitatively measure scratch performance and nanoindentation of these coatings at high temperature, overcoming experimental challenges with nanoindentation at high temperature. As temperature increased the ductility of the coatings increased leading to greater scratch damage and higher friction and wear rates. The work was in collaboration with Jaguar LandRover.