The Effect of Plasma Nitriding Time on the Tribological and Mechanical Properties of Electroless Nickel–Boron-Reduced Graphene Oxide (Ni–B-rGO) Nano-Composite Coatings

IF 1.6 4区材料科学 Q2 Materials Science

Transactions of The Indian Institute of Metals Pub Date : 2024-06-17 DOI:10.1007/s12666-024-03262-7

Zainab Wetwet, Farzad Mahboubi

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Abstract

In this research, the effect of plasma nitriding (PN) time on wear properties and hardness of Ni–B-20.5rGO electroless composite coatings was investigated. The PN process was performed in three different times (60, 120 and 180 min) at 400 °C under N₂-H₂ atmosphere on AISI 4140 steel. The results showed that adding 20.5 mg/L of rGO to the coating composition transformed its structure from an amorphous state to a quasi-crystalline. It also increased the hardness and improved the wear resistance of the coating. In contrast with heat treatment, PN significantly changes the surface morphology of electroless Ni–B coatings. Moreover, plasma nitriding affected the grain size and reduced the boron content due to the formation of hBN phase. NiB/20.5G/120PN sample had the highest hardness (1496 HV_0.1) and wear resistance (0.24 × 10⁻⁹ kg/N.m). It also showed a low friction coefficient and the most uniform crack-free worn surface.

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等离子氮化时间对化学镍-硼还原石墨烯氧化物（Ni-B-rGO）纳米复合涂层摩擦学和力学性能的影响

本研究探讨了等离子氮化（PN）时间对 Ni-B-20.5rGO 化学复合涂层磨损性能和硬度的影响。在 400 °C 的 N2-H2 气氛下，对 AISI 4140 钢进行了三种不同时间（60、120 和 180 分钟）的等离子氮化处理。结果表明，在涂层成分中添加 20.5 mg/L 的 rGO 可使其结构从无定形状态转变为准晶体结构。它还提高了涂层的硬度和耐磨性。与热处理相比，等离子氮化能显著改变无电解镍-B 涂层的表面形态。此外，等离子氮化会影响晶粒大小，并因形成 hBN 相而降低硼含量。NiB/20.5G/120PN 样品具有最高的硬度（1496 HV0.1）和耐磨性（0.24 × 10-9 kg/N.m）。它还显示出较低的摩擦系数和最均匀的无裂纹磨损表面。

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来源期刊

Transactions of The Indian Institute of Metals Materials Science-Metals and Alloys

CiteScore

2.60

自引率

6.20%

发文量

期刊介绍： Transactions of the Indian Institute of Metals publishes original research articles and reviews on ferrous and non-ferrous process metallurgy, structural and functional materials development, physical, chemical and mechanical metallurgy, welding science and technology, metal forming, particulate technologies, surface engineering, characterization of materials, thermodynamics and kinetics, materials modelling and other allied branches of Metallurgy and Materials Engineering. Transactions of the Indian Institute of Metals also serves as a forum for rapid publication of recent advances in all the branches of Metallurgy and Materials Engineering. The technical content of the journal is scrutinized by the Editorial Board composed of experts from various disciplines of Metallurgy and Materials Engineering. Editorial Advisory Board provides valuable advice on technical matters related to the publication of Transactions.