Wear failure mechanism of TiSiN coating at elevated temperatures
Wear failure mechanism of TiSiN coating at elevated temperatures
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TiSiN涂层高温磨损失效机理
DOI：
10.1016/j.apsusc.2019.05.120
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发表时间：
2019-09
影响因子：
6.7
通讯作者：
Wang Liping
中科院分区：
文献类型：
--
作者：
Zhu Yebiao;Dong Minpeng;Li Jinlong;Wang Liping
为了提高钛合金的高温耐磨性，采用电弧离子镀技术制备了TiSiN涂层。在横截面图像中观察到1.97 μm的厚度和柱状晶体。结果发现，TiSiN涂层在高温下比在室温下具有更低的摩擦系数。然而，在500 °C的温度下，磨损率的上升表明涂层的破坏。摩擦过程中柱状晶被破坏，生成氧化物、非晶相和大量含缺陷的纳米晶。同时，在500 °C时，涂层中出现了大量裂纹，使氧气进入涂层内部，导致涂层氧化更加严重。
The TiSiN coating was prepared by arc ion plating to improve wear resistance of titanium alloy at elevated temperatures. The thickness of 1.97 μm and the columnar crystal were observed in cross section image. It was found that the TiSiN coating had a lower friction coefficient at high temperatures than at room temperature. Nevertheless, the rising wear rate at the temperature of 500 °C indicated the destruction of the coating. The friction process would destroy the columnar crystal and generate oxide, amorphous phase and a lot of nanocrystalline with defects. Meanwhile, an amount of cracks were found in the coating at 500 °C which allowed oxygen get in touch with the interior of the coating and resulted in a more serious oxidization.
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