Wear Property of Tetrahedral Amorphous Carbon Thick Film with Dispersed Nano-Diamond on Quenched 440C Stainless Steel

Monday, April 23, 2012: 11:20 AM
Red Rock C (Red Rock Casino Resort and Spa)
Prof. Takahisa Yamazaki , Tokyo Institute of Technology, Tokyo, Japan
Kohei Fujioka , Tokyo Institute of Technology, Tokyo, Japan
Mr. Hidenari Tsuda , Tokyo Institute of Technology, Tokyo, Japan
Prof. Toshi-Taka Ikeshoji , Tokyo Institute of Technology, Tokyo, Japan
Akio Suzumura , Tokyo Institute of Technology, Tokyo, Japan
To exploit the performance of tetrahedral amorphous carbon (ta-C) films against a severe load and wear, thick film of ta-C containing of nano-cluster diamond (NCD) was produced. Taking into account of the adhesion of ta-C films to substrates, 440C stainless steel was selected due to its surface hardness, composition of carbon-rich, and affinity with carbon films. The coated components are utilized for the automobile’s engine application. The measurement of thickness of the deposited thick film and reciprocated sliding test was performed by converting an atomic force microscope (AFM), and the thickness of the film coated for 4h by Radio-Frequency Plasma enhanced chemical vapor deposition on the quenched 440C stainless steel with NCD powder spattering was measured as over 1µm, which was comparatively thick of the ta-C films. The binding configuration was investigated from the view of nano-hardness and wear-tolerance of this film by using Raman spectroscopy, nano-indentation test and reciprocated sliding test. These tests clarified that this film had > 90%sp³-content, elastic layer and wear resistive performance up to the load of 2.72GPa.