Interface Feature via Key Factor on Adhesion of CrN Multilayer and Alloy Substrate
Interface Feature via Key Factor on Adhesion of CrN Multilayer and Alloy Substrate
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DOI：
10.1016/j.apsusc.2023.157492
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发表时间：
2023-05
影响因子：
6.7
通讯作者：
Shuai Xu;Zhuo Zhao;Yanwen Zhou;Dongxu Chen;Kaice Zhang;Tong Li;Yang-tao Zhou;Aihuai Wang
中科院分区：
文献类型：
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作者：
Shuai Xu;Zhuo Zhao;Yanwen Zhou;Dongxu Chen;Kaice Zhang;Tong Li;Yang-tao Zhou;Aihuai Wang
在具有高模量的316L不锈钢和具有相反性能的TC 4钛合金上沉积CrN多层涂层，以揭示涂层/基体系统的粘附机制和变形行为。由于微观结构的不同，涂层的形貌从316L上的单一多边形变化到TC 4上的多边形和矩形混合形状。在316L上，裂纹从Cr/CrN界面处开始扩展，并扩展到CrN层中，然后停止在CrN层中;在TC 4上，裂纹扩展通过CrN层。CrN/Cr/316L共格界面呈现出有序的弯曲，表明存在强的界面结合。未变形的CrN/Cr/TC 4界面显示出不相容的变形和弱键。这与TC 4上Cr/CrN界面拉伸应力较高（123.1 GPa），而316 L上较低（99.3 GPa）的事实一致。CrN/TC 4的Wp/Weratio（即1.94）低于CrN/316L的Wp/Weratio（即2.61）。这表明CrN/316L合金具有良好的吸能能力，这是由于合金的塑性变形协调所致。涂层/TC 4之间观察到的失效机制归因于它们的模量的差异，这导致不相容的变形、高界面拉伸应力和对外部功的低吸收能力。
CrN multilayer coatings were deposited on 316L stainless steel, which has a high modulus, and TC4 titanium alloy, which exhibits the opposite properties, to reveal adhesion mechanisms and deformation behavior of the coating/substrate systems. Because of the different microstructures, the coatings’ morphologies varied from single polygon on the 316L to polygon and rectangle-mixed shapes on the TC4. On 316L, the cracks initiated from the Cr/CrN interfaces and propagated into the CrN layer, which stopped within it. On TC4, the cracks propagated through the CrN layer. The coherent nanocrystal interfaces in CrN/Cr/316L exhibited orderly bending, revealing the presence of strong interfacial bonds. The undeformed interfaces in CrN/Cr/TC4 indicated incompatible deformation and weak bonds. This was consistent with the fact that on TC4, the Cr/CrN interface tensile stress was high, at 123.1 GPa, while it was lower on 316L, at 99.3 GPa. The Wp/Weratio of CrN/TC4, namely 1.94, was lower than that of CrN/316L, namely 2.61. This indicated that CrN/316L had a high energy-absorption ability because of compatible plastic deformation. The failure mechanism observed between the coating/TC4 was attributed to the differences in their moduli, which led to incompatible deformation, high interfacial tensile stress, and low absorption capability for external work.