口头报告Effect of methane flux on TiCx films deposited by magnetron sputtering with and without hot filaments induced plasma
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摘要
The properties of TiC film, a widely used wear-resistant film, are closely dependent on its chemical composition and microstructure. Plasma enhanced magnetron sputtering (PEMS) can obtain a high ion flux around substrates via hot filaments thermionic emission to improve the microstructure and properties of the film, as compared to conventional magnetron sputtering (CMS). To further investigate the effect of hot filaments induced plasma on the film deposited by PEMS technique, the TiCx films were deposited by reactively sputtering titanium target in a varied methane and argon mixed atmosphere with and without hot filaments induced plasma. The microstructure and properties of as-deposited TiCx films has been mainly scrutinized with scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, nano indentation, and ball-on-disk tribo-test. A significantly densified microstructure has been observed in the PEMS-TiCx film, rather than a columnar microstructure in the CMS-TiCx film. As methane flux is increased from 4 to 16 sccm, the value of x is gradually increased from 0.28 to 0.96 and 0.28 to 0.73 in PEMS-TiCx and CMS-TiCx films, respectively. The phase composition of two series of TiCx films is changed from Ti + TiC phases to pure TiC phase and a pronounced preferred growth along (111) appears in PEMS-TiCx films. The hardness of the PEMS-TiCx film is firstly increased and then decreased as methane flux is increased, and a maximum hardness of 29.6 GPa is obtained at 12 sccm, while the hardness of CMS-TiCx film fluctuates under 10.6 GPa. The wear rate of TiCx film is firstly decreased and then increased, when the methane flux is increased. The lowest wear rate of PEMS-TiCx film is 7.2×10-16 m3/(N·m), nearly one thirteenth of that of CMS-TiCx film. PEMS technique can be used to deposit the TiC film with a good combination of hardness, toughness, and wear resistance.
关键词
TiCx film, methane flux, magnetron sputtering, hot filaments induced plasma, wear performance
报告人
谢 启
中国地质大学(北京)

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