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Tribological characteristics of sputtered Au/Cr films on alumina substrates at elevated temperatures

机译:高温下氧化铝基底上溅射的Au / Cr膜的摩擦学特性

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摘要

Research to evaluate the tribological properties of alumina pins sliding against thin sputtered gold films deposited on alumina disk substrates is described. A 250 A thick chromium interlayer was first deposited onto the alumina test disks to enhance adhesion and high temperature wetting of the gold films. The Au/Cr films were tribotested in pure sliding in a pin-on-disk tribometer under a 4.9 N load at 1m/s. The test atmosphere was room air at temperatures of 25, 500, and 800 C and the test duration varied from 60 to 540 min. The use of the Au/Cr films reduced friction by about a factor of two compared to the unlubricated alumina sliding couple. The coatings prevented wear of the alumina substrate disks and reduced pin wear by one to two orders of magnitude. In addition, wear lives in excess of 200,000 sliding passes (9 hr) were observed during sliding at 800 C. The results suggest that these films show promise for the practical lubrication of many high temperature sliding components.
机译:描述了评估氧化铝销钉对沉积在氧化铝盘基片上的溅射金薄膜的摩擦性能的研究。首先将250厚的铬中间层沉积到氧化铝测试盘上,以增强金膜的附着力和高温润湿性。在4.9 N负载下以1m / s的速度通过销盘摩擦仪在纯滑动条件下对Au / Cr薄膜进行了摩擦测试。测试气氛是温度为25、500和800℃的室内空气,测试持续时间从60到540分钟不等。与未润滑的氧化铝滑动偶相比,Au / Cr膜的使用将摩擦降低了大约两倍。该涂层防止了氧化铝基片的磨损,并使销的磨损减少了一到两个数量级。此外,在800℃的滑动过程中,观察到超过200,000次滑动行程(9小时)的磨损寿命。结果表明,这些薄膜显示出对许多高温滑动部件进行实际润滑的希望。

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