通过PVD法在NiTi基板上镀薄TiN:提高耐磨性

IF 1.6 Q4 MATERIALS SCIENCE, COATINGS & FILMS Tribology - Materials, Surfaces & Interfaces Pub Date : 2023-08-16 DOI:10.1080/17515831.2023.2245652
Nasim Botshekanan, H. Majidian, M. Farvizi
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引用次数: 0

摘要

制备一层薄而硬的涂层是镍钛涂层的主要难点。为了在NiTi衬底上制备一层薄薄的氮化钛(TiN),本文提出了物理气相沉积(PVD)的方法。在0.79和0.93 Pa的氮气流下沉积TiN涂层。对TiN涂层的相组成、厚度、孔隙率、附着强度、硬度和摩擦学性能进行了评价。涂层与基材的附着力是可以接受的。随着气体流量的增加,涂层厚度增大(1 μm),孔隙率降低,粘接强度提高。相反,低气体流量制备的样品硬度和弹性模量更高。与基体相比,涂层试样具有较小的磨损宽度、较低的磨损速率和较低的摩擦系数。分层磨损和粘着磨损机制支配着磨损过程。
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Thin TiN coating on NiTi substrate through PVD method: improvement of the wear resistance
ABSTRACT The preparation of a thin hard coating is the main challenge in the coating of NiTi articles. To achieve a thin coating of titanium nitride (TiN) on NiTi substrate, physical vapour deposition (PVD) was proposed in this study. Deposition of TiN coating was carried out at the nitrogen flows of 0.79 and 0.93 Pa. Phase composition, thickness, porosity, adhesion strength, hardness, and tribological properties of the TiN coatings were evaluated. The adhesion of the coating to the substrate was acceptable. Increasing of the gas flow resulted in a higher thickness (1 μm), lower porosity and higher adhesion strength. On contrary, the samples prepared with the lower gas flow showed higher hardness and elastic modulus. The coated samples showed smaller width of wear, lower wear rate and lower friction coefficient in comparison to the substrate. The delamination and adhesive wear mechanisms govern the wear process.
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来源期刊
Tribology - Materials, Surfaces & Interfaces
Tribology - Materials, Surfaces & Interfaces MATERIALS SCIENCE, COATINGS & FILMS-
CiteScore
2.80
自引率
0.00%
发文量
15
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