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Effect of relative humidity and temperature on the tribology of multilayer micro/nanocrystalline CVD diamond coatings

机译：相对湿度和温度对多层微/纳米晶CVD金刚石涂料的影响

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摘要

The tribological behavior of tenfold micro/nanocrystalline CVD diamond multilayers is here investigated in self mated configuration using ball-on-plate reciprocating wear testing. The effects of relative humidity (RH) and temperature (T) on friction and wear coefficients are assessed. The strongest effect of humidity was found on the value of the critical load (no delamination) that triples from 40 N at 10%RH to 120 N at 90%RH. Evaluation of the wear coefficients of the plates was only possible with the use of 3D optical profilometry. A valley-shaped evolution is observed for the wear coefficient of the plates, within the 10% to 90% RH range, with a minimum of about 1.7x10(-7) mm(3)N(-1).m(-1), indicative of a mild wear regime, whereas the balls have lower values in the very mild wear regime of k - 10(-8) mm(3)N(-1).m(-1). The clearest difference between the RH and temperature experiments is observed for the critical loads, limited to the range 40-55 N at 50-100 degrees C, while at room temperature a value of 120 N was reached. However, the critical loads at high temperature are similar to those attained under dry conditions (s25% RH) highlighting the absence of water as the load bearing medium. (C) 2016 Elsevier B.V. All rights reserved.
机译：在此，使用球形板往复磨损试验在这里研究了十倍微/纳米晶CVD金刚石多层金刚石多层的摩擦学行为。评估相对湿度（RH）和温度（T）对摩擦和磨损系数的影响。在90％RH的临界载荷（无分层）的临界负荷（无分层）的值下发现湿度最强的湿度的最强效果。只有使用3D光学轮廓测定法，才能评估板的磨损系数。观察到谷形的进化，在10％至90％RH范围内，最小约1.7×10（3）n（-1）.m（-1 ），表示温和的磨损方案，而球在K-10（-8）mm（3）n（-1）μm（-1）的非常温和的磨损状态下具有较低的值。 rh和温度实验之间的最明显的差异被观察到临界载荷，限制在50-100℃的范围内，而在室温下达到120n的值。然而，高温下的临界载荷与干燥条件（S25％RH）所达到的临界负载相似，突出于没有水作为负载介质。 （c）2016年Elsevier B.v.保留所有权利。

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