Dry Sliding Behaviour of AlCrN and TiN Coatings
Dry Sliding Behaviour of AlCrN and TiN Coatings
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DOI：
10.4028/www.scientific.net/amr.576.559
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发表时间：
2012-10
期刊：
影响因子：
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通讯作者：
W. Liew;Sebastian Dayou;M. Ismail;N. J. Siambun;J. Dayou
中科院分区：
文献类型：
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作者：
W. Liew;Sebastian Dayou;M. Ismail;N. J. Siambun;J. Dayou
本文用球盘式摩擦试验机和往复式摩擦试验机研究了AlCrN和TiN PVD涂层在大气和真空中的摩擦行为。通过对涂层在空气和高真空环境中滑动的对比研究，可以深入了解氧化对涂层摩擦性能的影响。研究了载荷、滑动速度、温度等因素对涂层摩擦性能的影响。在真空中进行的球盘试验中，(i) TiN的摩擦系数（COF）低于AlCrN，表明TiN具有更好的润滑性；（ii）更高的速度导致更低的COF； （iii）两种涂层的COF都低于空气中产生的COF。在环境空气中，(i) AlCrN的COF比TiN低，由于氧化的影响，在滑动界面上留下了较高的磨损碎片；（ii）更高的速度导致更低的COF，与真空中观察到的相似。在往复试验中，在低负荷下，将温度从室温升高到150°C导致COF降低。然而，在高负荷下，温度对COF几乎没有影响。较高的标称负载导致较低的COF，而较高的速度导致较高的COF。
This paper examines the friction behaviour of AlCrN and TiN PVD coatings in atmospheric air and vacuum using a ball-on-disc and a reciprocating tribotesters. Comparative study on the coating sliding in air and in high vacuum environment provides important insight on the effect of oxidation on the friction behaviour of the coatings. Other important factors such as load, sliding velocity, temperature effects on the frictional behaviour of these coatings were also investigated. In the ball-on-disc tests carried out in vacuum, (i) TiN gave lower coefficient of friction (COF) than AlCrN, indicating that TiN was more lubricous, (ii) higher speed resulted in lower COF, and (iii) the COF of both coatings were lower than that produced in air. In ambient air, (i) AlCrN gave lower COF than TiN with high wear debris retention on the sliding interface due to the effect of oxidation, and (ii) higher speed resulted in lower COF, similar to that observed in vacuum. In the reciprocating tests, at low load, increasing the temperature from room temperature to 150 °C resulted in a reduction in the COF. However, at high load, the temperature virtually did not affect the COF. Higher nominal load resulted in lower COF while higher speed resulted in higher COF.