| 1 | Synthesis and Tribological Behaviors of Ti_3SiC_2 Material Prepared by Vacuum Sintering Technique显示文摘The bulk Ti3SiC2 specimens with less than 1 wt% TiC impurity were prepared by vacuum sintering technique, and the average grain size was about 5-6 μm in the elongated direction. When the sintering temperature, soaking time and heating rate were 1 400 ℃, 1 h and 10 ℃·min-1 , respectively, the highest relative density of Ti3SiC2 specimens could reach 97.8%. Meanwhile, the lowest coefficient of friction (COF) and wear rate (WR) of the Ti3SiC2 samples were 0.55 and 1.37×10-3mm3(Nm)-1 at a sliding speed of 0.35 m/s, load pressure of 10 N and ambient condition, respectively. The COF of the Ti3SiC2 sample reduced with the increasing of the load pressure, while the WRs fluctuated little. The WR increased with the increasing of the sliding speed, and weakly influenced the COF. These changing behaviors could be attributed to the presence and coverage of the amorphous mixture oxide film of Ti, Si, Al, and Fe on the Ti3SiC2 friction surface. The selfantifriction mechanism led to reducing of the COF. The increasing of the WR was attributed to the wearing consumption. | 史晓亮 ZHAI Wenzheng PENG Meichao ZHU Zhiwei WANG Mang XU Zengshi YAO Jie SONG Siyuan Abid Qamar ud Din | 2013 | Journal of Wuhan University of Technology(Materials Science)2013，28，3： | 1 |
| 4 | Tribological Properties of TiAl-Ti_3SiC_2 Composites显示文摘The tribological properties of TiAl-Ti3SiC2 composites(TMC) against Si3N4 ceramic ball pair at room temperature were investigated through the determination of friction coefficients and wear rates, and the morphologies and compositions of wear debris, worn surfaces of TMC and Si3N4 ceramic ball were analyzed. The experimental results showed that TMC with 15wt% Ti3SiC2 exhibited relatively excellent tribological properties. The solid-phase self-lubricating tribo-layers formed on the worn surfaces of both TMC with 15wt% Ti3SiC2 and Si3N4 ceramic ball, which was beneficial to the lower friction coefficient and wear rate. | 薛冰 XU Zengshi ZHANG Qiaoxin SHI Xiaoliang WANG Mang ZHAI Wenzheng YAO Jie SONG Siyuan | 2014 | Journal of Wuhan University of Technology(Materials Science)2014，29，2： | 0 |
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