Renewable Cr2O3 Nanolayer on Cr(W)N Surface for Seizure Prevention at Elevated Temperatures,ACS Applied Materials & Interfaces

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Renewable Cr2O3 Nanolayer on Cr(W)N Surface for Seizure Prevention at Elevated Temperatures
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2018-07-09 00:00:00 , DOI: 10.1021/acsami.8b07938
Chen Zhao ₁ , Xueyuan Nie ₁ , Jimi Tjong ₂

Affiliation

Chromium nitride coating is now the norm for improving the wear resistance of high-performance mechanical components. Even so, to prevent the seizure issue between the contacting interfaces, the prerequisites are oil or solid lubricants which would however lose the lubricating functionality at elevated temperatures due to breakdown or degradation. In this research, we utilize a Cr₂O₃ nanolayer formed on modified Cr(W)N coating to prevent the adhesive seizure for steel-based components. X-ray photoelectron spectroscopy (XPS) analyses show that the chromium oxide can be generated at 200–400 °C. At 400 °C, the Cr₂O₃ nanolayer is in situ formed and maintains a consistent thickness of 2.2 nm due to the oxide renewal during the heating-sliding operation. The in situ, renewable oxide nanolayer provides a novel approach to the technically unsolved seizure problem occurring in high-performance machines operated at elevated temperatures.

中文翻译：

Cr（W）N表面上的可再生Cr ₂ O ₃纳米层，用于防止高温下的癫痫发作

现在，氮化铬涂层已成为提高高性能机械部件耐磨性的标准。即便如此，为了防止接触界面之间的咬合问题，前提条件是油或固体润滑剂，但是由于分解或降解，它们会在高温下失去润滑功能。在这项研究中，我们利用在改性的Cr（W）N涂层上形成的Cr ₂ O ₃纳米层来防止钢基部件发生粘着。X射线光电子能谱（XPS）分析表明，氧化铬可以在200–400°C的温度下生成。在400°C时Cr ₂ O ₃纳米层是原位形成的，并且由于在加热-滑动操作过程中氧化物的更新而保持恒定的2.2 nm厚度。原位可再生氧化物纳米层为解决在高温下运行的高性能机器中出现的技术上尚未解决的癫痫发作问题提供了一种新颖的方法。

更新日期：2018-07-09

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