‎Deposition of Ni-tungsten carbide nanocomposite coating by TIG ‎welding: Characterization and control of microstructure and wear/corrosion responses‎

Sabzi, Masoud; Dezfuli, Saeid Mersagh; Far, Sadegh Moeini

doi:10.1016/j.ceramint.2018.09.073

Cited by 77 publications

(14 citation statements)

References 58 publications

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“…After introduction of low Nb content, the OCP value at initial immersion was obviously higher than that of raw coating, whereas a sharp potential decrement from −0.32V to −0.40V was subsequently observed, which indicated the fast dissolution rate of coating due to the corrosion origin in fine dendritic regions. 25 Later on, the rapidly increased value was associated with quick nucleation and growth of oxidized products, which existed in the dynamic process of anode formation and decomposition. Once the oxidized products could form a continuous and stable passive film on the coating surface, it dominated corrosion by hindering the electrolyte diffusion and shifting the subsequent OCP value toward a more positive direction.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and anti-corrosion performance of laser cladded Nb-modified Ni-based alloy coatings

Chen

Wang

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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In this work, Ni-based alloy coatings incorporated with Nb mass fractions of 0%, 3%, 6%, and 9% were successfully fabricated by laser cladding. The morphology, chemical composition, and phases of the obtained Nb-modified Ni-based coatings were characterized, and the effects of Nb contents on their electrochemical performance and immersion rates in 3.5 wt% NaCl solution were analyzed. The results show that the Ni-based coating with low Nb exhibits the most compact and refined microstructure, the best electrochemical passivation, and the lowest immersion corrosion rate of 3.30 × 10−3 mm/year. However, with increasing Nb content, the Laves phase is accumulated, and dendritic growth is promoted, which significantly decreases the coating passive stability and worsens the anti-corrosion performance.

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Section: Resultsmentioning

confidence: 99%

Microstructure and anti-corrosion performance of laser cladded Nb-modified Ni-based alloy coatings

Chen

Wang

2021

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…Therefore, the development of advanced hard ceramic coatings can be achieved by tailoring the coating structure of single-layer coatings by adding suitable elements and fabricating novel coating architectures, such as multilayer and multicomponent nanocomposite coatings. Many key findings have indicated that tuning the microstructure of hard coatings has a considerable effect on friction and wear resistance properties [6][7][8]. Sabzi et al [8] observed a significant reduction in friction (0.08) and wear for a Ni-W2C (20 wt% W2C) nanocomposite coating compared to a Ni coating (CoF: 0.72), owing to the dendritic microstructure with a uniform distribution of W2C nanoparticles.…”

Section: Introduction and Need For Hard Coatingsmentioning

confidence: 99%

State-of-the-Art Developments in Advanced Hard Ceramic Coatings Using PVD Techniques for High-Temperature Tribological Applications

2023

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Hard and wear-resistant coatings created utilizing physical vapor deposition (PVD) techniques are extensively used in extreme tribological applications. The friction and wear behavior of coatings vary significantly with temperature, indicating that advanced coating concepts are essential for prolonged load-bearing applications. Many coating concepts have recently been explored in this area, including multicomponent, multilayer, gradient coatings; high entropy alloy (HEA) nitride; and functionally modified coatings. In this review, we highlighted the most significant findings from ongoing research to comprehend crucial coating properties and design aspects. To obtain enhanced tribological properties, the microstructure, composition, residual stress, hardness, and HT oxidation resistance are tuned through doping or addition of appropriate materials at an optimized level into the primary coatings. Such improvements are achieved by optimizing PVD process parameters such as input power, partial pressure, reactive gas flow rates, substrate bias, and temperature. The incorporation of ideal amounts of Si, Cr, Mo, W, Ag, and Cu into ternary and quaternary coatings, as well as unique multilayer designs, considerably increases the tribological performance of the coatings. Recent discoveries show that not only mechanical hardness and fracture toughness govern wear resistance, but also that oxidation at HT plays a significant role in the lubrication or wear failure of coatings. The tribo-induced metal oxides and/or Magnéli phases concentrated in the tribolayer are the key governing factors of friction and wear behavior at high temperatures. This review includes detailed insights into the advancements in wear resistance as well as various failure mechanisms associated with temperature changes.

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“…e size of the powder material has also influenced in improving the metallurgical quality of the coatings [15]. e use of nickel-tungsten carbide (Ni-WC) powder in terms of nano structure will increase the strength in grain boundaries on deposition [16]. A step ahead, the coatings in the form ceramic and metallic carbide/oxide is used as a composite coating [17].…”

Section: Introductionmentioning

confidence: 99%

Influence of Carbon Nanotubes on Enhancement of Sliding Wear Resistance of Plasma-Sprayed Yttria-Stabilised Zirconia Coatings

Kalangi

Bolleddu

2022

Advances in Materials Science and Engineering

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An experimental investigation was performed to study the performance of thermally sprayed yttria stabilised zirconia (YSZ) coatings obtained with the reinforcement of carbon nanotubes (CNTs) in different weight percentage proportions. The atmospheric plasma spray (APS) method was used to deposit YSZ + CNTs at three different weight proportions on low carbon steel (AISI 1020) following the industrial standard procedure. The quality of thermally sprayed coatings was evaluated to report on percentage porosity (ASTM B276), sliding wear resistance (ASTM G133-05), and metallurgical bonding of the coating with the substrate material. From this investigation results, it has been confirmed that the thickness of the coatings is almost uniform, and the percentage porosity is decreased with an increase in CNTs weight percentage proportion. ImageJ software has confirmed the presence of CNTs in the ceramic deposit, and also uniform distribution throughout the coating. Subsequently, the metallurgical bonding of the deposit is also ensured and confirmed that the deposit adheres on the substrate. The hardness of the coating found increased with the increase in CNTs proportion as 554 Hv with 1 wt.% CNTs, 805 Hv with 3 wt.% CNTs, and 933 Hv with 5 wt.% CNTs in thermally sprayed YSZ. The results obtained are highly appreciable when compared to the hardness (454 Hv) of thermally sprayed pure YSZ coating. From results of wear tests, it was found that at slow speed (i.e., 319 rpm), the minimum mass loss was identified for all the three different combinations of CNTs reinforced coatings. However, 5 wt.% of CNTs in YSZ has very minimum wear at 5 kgf load and subsequently mass loss increased with the decrease in CNTs weight percentage proportion. Based on wear resistance, it was found that the 5 wt.% CNTs in YSZ has a maximum wear resistance. Severe wear scars and coating delamination in 1% CNTs reinforced coatings were identified from the microstructural analysis. Therefore, addition of CNTs in YSZ coatings has a significant impact over the wear resistance and mechanical properties improvement of the coatings.

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‎Deposition of Ni-tungsten carbide nanocomposite coating by TIG ‎welding: Characterization and control of microstructure and wear/corrosion responses‎

Cited by 77 publications

References 58 publications

Microstructure and anti-corrosion performance of laser cladded Nb-modified Ni-based alloy coatings

Microstructure and anti-corrosion performance of laser cladded Nb-modified Ni-based alloy coatings

State-of-the-Art Developments in Advanced Hard Ceramic Coatings Using PVD Techniques for High-Temperature Tribological Applications

Influence of Carbon Nanotubes on Enhancement of Sliding Wear Resistance of Plasma-Sprayed Yttria-Stabilised Zirconia Coatings

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