Influence of phase transition on the tribological performance of arc-evaporated AlCrVN hard coatings
Influence of phase transition on the tribological performance of arc-evaporated AlCrVN hard coatings
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DOI：
10.1016/j.surfcoat.2008.10.003
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发表时间：
2009-01-15
影响因子：
5.4
通讯作者：
Mitterer, C.
中科院分区：
文献类型：
--
作者：
Franz, R.;Neidhardt, J.;Mitterer, C.
在偏置电压为-40 ~-150 V的工业规模的沉积系统中，通过反应电弧蒸发合成了V合金化的AlCrN硬质涂层。X射线衍射分析表明，即使在非常高的Al/V比下，较高能量的生长条件也稳定了所需的Al0.70Cr0.05V0.25N亚稳面心立方（fcc）晶体结构。Cr比率导致硬度值与Al0.70Cr0.30N相当。球盘试验用于评估在700 ℃下的摩擦，其中Al 0.70 Cr 0.05 V 0.25 N涂层由于形成含有润滑氧化物V2 O 5的摩擦层而显示出通常较低的摩擦系数，如拉曼光谱所证明的。单相fcc-Al 0. 7 Cr 0. 05 V 0. 25 N涂层似乎更抗氧化，导致V2 O 5的形成减少，因此，摩擦增加。通过在干燥条件下进行侧铣试验来评估切削性能，其中Al0.70Cr0.05V0.25N涂层无论生长条件如何都显示出具有竞争力的性能。(C)2008 Elsevier B. V.保留所有权利。
V-alloyed AlCrN hard coatings were synthesised by reactive arc-evaporation in an industrial-sized deposition system at bias voltages ranging from -40 to -150 V. X-ray diffraction analysis has shown that higher energetic growth conditions stabilise the desired metastable face-centered cubic (fcc) crystal structure of Al0.70Cr0.05V0.25N even at very high Al/Cr ratios resulting in hardness values comparable to Al0.70Cr0.30N. Ballon-disc tests were used to assess the friction at 700 degrees C where Al0.70Cr0.05V0.25N coatings revealed a generally lower coefficient of friction due to the formation of a tribolayer containing the lubricious oxide V2O5 as evidenced by Raman spectroscopy. The single-phase fcc-Al0.7Cr0.05V0.25N coating appears to be more oxidation resistant leading to a reduced formation Of V2O5 and, hence, an increase in friction. The cutting performance was evaluated by conducting side milling tests under dry conditions, where Al0.70Cr0.05V0.25N coatings showed a competitive performance regardless of the growth conditions. (C) 2008 Elsevier B.V. All rights reserved.