Evaluation of Tribological Characteristics of Atmospheric Plasma Spray Deposited Ni-Based Coatings

IF 3.2 3区材料科学 Q2 MATERIALS SCIENCE, COATINGS & FILMS

Journal of Thermal Spray Technology Pub Date : 2024-04-23 DOI:10.1007/s11666-024-01771-x

Rohit Kumar Singh Gautam, Vivek Mani Tripathi, Sunny Singhania, Subhash Mishra, Pushkar Jha, Amit Kumar Singh, Narendra Gariya, Sana Shahab, Hemant Nautiyal

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Abstract

Present investigation attempted to explore the tribological properties of atmospheric plasma sprayed coatings. In order to assess the role of solid lubricants, different weight percentages (5, 10, and 15 wt.%) of silver (Ag) were taken, whilst MoS₂ concentration remained fixed. Dry sliding wear tests were conducted for different specimens namely, Ni-Al-MoS₂-5 wt.% Ag (NA5), Ni-Al-MoS₂-10 wt.% Ag (NA10) and Ni-Al-MoS₂-15 wt.% Ag (NA15) at different loads of 4, 9, 14 & 19 N, and slid speed of 0.3 m/s under room temperature (RT) conditions. It was observed that coefficient of friction (COF) and wear rate of specimens decreased as the load increased till 14 N, and beyond that increasing trend was noticed. However, the NA10 specimen has revealed the best tribological properties in terms of minimum COF (0.48) and wear rate (4.7 × 10⁻⁵ mm³/Nm) at 14 N and 0.3 m/s. The synergy of Ag and MoS₂ on the frictional properties of specimens have been well explained with the help of worn surface morphologies and some useful conclusions were made.

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大气等离子喷涂沉积镍基涂层的摩擦学特性评估

目前的研究试图探索常压等离子喷涂涂层的摩擦学特性。为了评估固体润滑剂的作用，采用了不同重量百分比（5、10 和 15 wt.%）的银（Ag），而 MoS2 的浓度保持不变。在室温（RT）条件下，对不同试样（Ni-Al-MoS2-5 wt.% Ag (NA5)、Ni-Al-MoS2-10 wt.% Ag (NA10)和 Ni-Al-MoS2-15 wt.% Ag (NA15)）在 4、9、14 & 19 N 的不同载荷和 0.3 m/s 的滑动速度下进行了干滑动磨损试验。结果表明，试样的摩擦系数（COF）和磨损率随着载荷的增加而下降，直到 14 N，之后呈上升趋势。然而，在 14 N 和 0.3 m/s 条件下，NA10 试样的摩擦系数（0.48）和磨损率（4.7 × 10-5 mm3/Nm）最小，显示出最佳的摩擦学特性。在磨损表面形态的帮助下，Ag 和 MoS2 对试样摩擦性能的协同作用得到了很好的解释，并得出了一些有用的结论。

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来源期刊

Journal of Thermal Spray Technology 工程技术-材料科学：膜

CiteScore

5.20

自引率

25.80%

发文量

198

审稿时长

2.6 months

期刊介绍： From the scientific to the practical, stay on top of advances in this fast-growing coating technology with ASM International''s Journal of Thermal Spray Technology. Critically reviewed scientific papers and engineering articles combine the best of new research with the latest applications and problem solving. A service of the ASM Thermal Spray Society (TSS), the Journal of Thermal Spray Technology covers all fundamental and practical aspects of thermal spray science, including processes, feedstock manufacture, and testing and characterization. The journal contains worldwide coverage of the latest research, products, equipment and process developments, and includes technical note case studies from real-time applications and in-depth topical reviews.