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Wear and friction behavior of TiB2 thin-film coated AISI52100 steels under the lubricated condition
Tribology Transactions ( IF 2.1 ) Pub Date : 2020-08-17 , DOI: 10.1080/10402004.2020.1784497
Doğuş Özkan 1 , Mustafa A. Yılmaz 1 , Seda Ataş Bakdemir 1 , Egemen Sulukan 1
Affiliation  

Abstract Magnetron-sputtered physical vapor deposited (PVD) thin-film TiB2 coatings were investigated as a wear-resistant cam tappet coating that runs under the boundary lubrication regime in internal combustion engines (ICEs). AISI 52100 samples with a high negative bias were coated at RF powers of 150, 170, and 190 W. Coatings were characterized via nanoindentation, scanning electron microscopy/energy-dispersive spectroscopy (SEM/EDX), X-ray diffraction (XRD), and Raman analysis. Friction and wear behaviors of these coatings were evaluated by tribometer tests at 25 and 50 N loads. Tests and tribochemical analysis showed that thin-film TiB2 coatings are very effective to reduce the friction coefficient (COF) and wear rate with a hardness value of approximately 30 GPa and elastic modulus of 424 GPa. Therefore, thin-film TiB2 has been evaluated as a good cam tappet coating for ICEs.

中文翻译:

TiB2薄膜涂层AISI52100钢在润滑条件下的磨损和摩擦行为

摘要 磁控溅射物理气相沉积 (PVD) 薄膜 TiB2 涂层作为耐磨凸轮挺杆涂层进行了研究,该涂层在内燃机 (ICE) 的边界润滑状态下运行。具有高负偏压的 AISI 52100 样品以 150、170 和 190 W 的射频功率进行涂层。涂层通过纳米压痕、扫描电子显微镜/能量色散光谱 (SEM/EDX)、X 射线衍射 (XRD)、和拉曼分析。这些涂层的摩擦和磨损行为通过摩擦计测试在 25 和 50 N 载荷下进行评估。测试和摩擦化学分析表明,薄膜 TiB2 涂层对降低摩擦系数 (COF) 和磨损率非常有效,硬度值约为 30 GPa,弹性模量为 424 GPa。所以,
更新日期:2020-08-17
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