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首页> 外文期刊>Journal of Materials Engineering and Performance >Double Glow Plasma Nitriding Pretreatment of TiAlN-Coated TA15 Alloy for Enhancement of Bonding Strength and Mechanical Properties
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Double Glow Plasma Nitriding Pretreatment of TiAlN-Coated TA15 Alloy for Enhancement of Bonding Strength and Mechanical Properties

机译：TiAln涂层Ta15合金的双辉络等离子体氮化预处理，提高粘接强度和机械性能

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摘要

As a classic hard coating, titanium aluminum nitride (TiAlN) coating is widely applied in the aviation field due to its extremely high hardness and strength. Unfortunately, the large difference in hardness and thermal expansion coefficient between the coating and the substrate could also lead to the reduction of bonding force. In this paper, Double-glow plasma nitriding (DGPN) pretreatment followed by RF magnetron sputtering was used to prepare DGPN-TiAlN coating on the surface of TA15 alloy. The adhesion and the bearing capacity of DGPN-TiAlN coating is characterized by scratch and indentation tests. The gradient hardness support and stress transition effect of the nitriding layer are significant, and the bonding strength of TiAlN coating and the substrate are significantly improved. In addition, the high temperature wear resistance and erosion resistance of DGPN-TiAlN coating were detected through high-temperature wear tests and sand erosion tests. At 500 degrees C, the surface of DGPN-TiAlN coating formes a dense Al2O3 lubricating film with good adhesion, and the friction coefficient is lower than that of TiAlN coating. Under different erosion speeds and erosion angles, the erosion rate of DGPN-TiAlN coating is lower than that of TiAlN coating, and the coating surface defects are less.
机译：氮化钛铝（TiAlN）涂层作为一种典型的硬质涂层，以其极高的硬度和强度在航空领域得到了广泛的应用。不幸的是，涂层和基体之间硬度和热膨胀系数的巨大差异也可能导致结合力的降低。本文采用双辉光等离子体渗氮（DGPN）预处理和射频磁控溅射技术在TA15合金表面制备了DGPN-TiAlN涂层。通过划痕和压痕试验对DGPN TiAlN涂层的附着力和承载能力进行了表征。氮化层的梯度硬度支撑和应力转移效应显著，TiAlN涂层与基体的结合强度显著提高。此外，通过高温磨损试验和砂蚀试验，检测了DGPN TiAlN涂层的高温耐磨性和耐冲蚀性。在500℃时，DGPN-TiAlN涂层表面形成致密的Al2O3润滑膜，附着力好，摩擦系数低于TiAlN涂层。在不同的冲蚀速度和冲蚀角度下，DGPN-TiAlN涂层的冲蚀率低于TiAlN涂层，且涂层表面缺陷较少。

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