“Hybrid” plasma spraying of NiCrAlY+Al 2 O 3 + h -BN composite coatings for sliding wear applications

Bolelli, Giovanni; Candeli, Alessia; Lusvarghi, Luca; Manfredini, Tiziano; Denoirjean, Alain; Valette, Stéphane; Ravaux, Alice; Meillot, E.

doi:10.1016/j.wear.2017.02.027

Cited by 34 publications

(11 citation statements)

References 69 publications

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“…The interest in exploring liquid-based spraying has been expanded significantly and novel methods for depositing composite, multilayered, functionally graded coating, and hybrid processes have emerged to enhance surface properties even further [159][160][161][162]. Gopal et al [163] demonstrated the potentials of hybrid technique by combining dual injection of distinct feedstock types to offer superior wear resistance coating.…”

Section: Suspension Plasma Spray (Sps)mentioning

confidence: 99%

Coatings for Automotive Gray Cast Iron Brake Discs: A Review

Aranke

Algenaid

Awe³

et al. 2019

Coatings

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Gray cast iron (GCI) is a popular automotive brake disc material by virtue of its high melting point as well as excellent heat storage and damping capability. GCI is also attractive because of its good castability and machinability, combined with its cost-effectiveness. Although several lightweight alloys have been explored as alternatives in an attempt to achieve weight reduction, their widespread use has been limited by low melting point and high inherent costs. Therefore, GCI is still the preferred material for brake discs due to its robust performance. However, poor corrosion resistance and excessive wear of brake disc material during service continue to be areas of concern, with the latter leading to brake emissions in the form of dust and particulate matter that have adverse effects on human health. With the exhaust emission norms becoming increasingly stringent, it is important to address the problem of brake disc wear without compromising the braking performance of the material. Surface treatment of GCI brake discs in the form of a suitable coating represents a promising solution to this problem. This paper reviews the different coating technologies and materials that have been traditionally used and examines the prospects of some emergent thermal spray technologies, along with the industrial implications of adopting them for brake disc applications.

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Section: Suspension Plasma Spray (Sps)mentioning

confidence: 99%

Coatings for Automotive Gray Cast Iron Brake Discs: A Review

Aranke

Algenaid

Awe³

et al. 2019

Coatings

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“…Bolelli et al [96] introduced submicron Al 2 O 3 particles into the NiCrAlY matrix by APS + SPS, which was characterized as a dual-scale structure of large NiCrAlY lamellae interspersed with fine and rounded Al 2 O 3 particles. Bolelli et al [97] also added h-BN based on NiCrAlY + Al 2 O 3 composite coatings by hybrid plasma spraying to achieve ternary systems. Particularly, the incorporation of lubricants within coatings is hot research in the field of wear-resistant coatings [98].…”

Section: Wear-resistant Coatingsmentioning

confidence: 99%

Micro-nano structured functional coatings deposited by liquid plasma spraying

Huan

et al. 2020

J Adv Ceram

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Inspired by the micro-nano structure on the surface of biological materials or living organisms, micro-nano structure has been widely investigated in the field of functional coatings. Due to its large specific surface area, porosity, and dual-scale structure, it has recently attracted special attention. The typical fabrication processes of micro-nano structured coatings include sol-gel, hydrothermal synthesis, chemical vapor deposition, etc. This paper presents the main features of a recent deposition and synthesis technique, liquid plasma spraying (LPS). LPS is an important technical improvement of atmospheric plasma spraying. Compared with atmospheric plasma spraying, LPS is more suitable for preparing functional coatings with micro-nano structure. Micro-nano structured coatings are mainly classified into hierarchical-structure and binary-structure. The present study reviews the preparation technology, structural characteristics, functional properties, and potential applications of LPS coatings with a micro-nano structure. The micro-nano structured coatings obtained through tailoring the structure will present excellent performances.

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“…The morphology was analyzed using a field emission scanning electron microscope (FESEM, JEOL, JSM-6700). Cross-sectional samples, prepared by metallographic cutting, were embedded in room temperature-setting epoxy resin, ground, and polished [22]. Then, they were etched for approximately 8 s with a solution of 50 mL concentrated acetic acid (C 2 H 4 O 2 ) and 50 mL concentrated nitric acid (HNO 3 ) [23].…”

Section: Electrochemical Testing and Structural Characterizationmentioning

confidence: 99%

Direct Correlations among the Grain Size, Texture, and Indentation Behavior of Nanocrystalline Nickel Coatings

Liu

Ren

Zhang

et al. 2019

Metals

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By using nc-Ni coatings as a model system, systematic experiments were designed to evaluate the interaction between the microstructural and mechanical properties tailored by electrodeposition conditions. A direct correlation between grain size and texture was established for the first time. The grain size of the (111) crystalline plane decreases with the texture coefficient (RTC) regardless of the process conditions, and that of the (220) plane has different trends. Then, a peculiar phenomenon is revealed that the dependence of hardness on grain size is accurately described by the Hall-Petch relationship when changing the temperature or pH, but with different slopes, while it deviates from such a relationship with changing current density, denoting more underlying mechanisms related to texture. Finally, a surprising degree of influence of texture on hardness and elastic modulus is also presented, with the overall trend of hardness increasing with texture; and when the RTC of (111) exceeds 40%, the elastic modulus increases with texture, implying a fundamental relationship between modulus and texture. Texture predominates over the other factors on the elastic modulus, revealing the importance of elastic anisotropy. Significantly, the present work suggests a useful tailoring routine to fabricate high quality nc-Ni coatings with the desired structure and mechanical properties.

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“Hybrid” plasma spraying of NiCrAlY+Al 2 O 3 + h -BN composite coatings for sliding wear applications

Cited by 34 publications

References 69 publications

Coatings for Automotive Gray Cast Iron Brake Discs: A Review

Coatings for Automotive Gray Cast Iron Brake Discs: A Review

Micro-nano structured functional coatings deposited by liquid plasma spraying

Direct Correlations among the Grain Size, Texture, and Indentation Behavior of Nanocrystalline Nickel Coatings

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