Effect of Cr2O3 addition on mechanical and tribological properties of atmospheric plasma-sprayed NiAl-Bi2O3 composite coatings

In this study, two kinds of NiCr/Cr3C2-BN composite powders were prepared with individual cladding (FKBN) and low pressure spray granulation (YLBN) methods, and the derived NiCr/Cr3C2-BN coatings were fabricated by plasma spraying technology. The microstructure, mechanical and tribological properties of the two coatings were systematically investigated. Both NiCr/Cr3C2-BN coatings have relatively high adhesive strength and microhardness, but the porosity of YLBN coating is much lower than that of FKBN coating. With comparison to FKBN coating, YLBN coating showed lower friction coefficient and better wear resistance, which was attributed to the more compact microstructure and uniform distribution of BN in the coating.

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Microstructural Charactistics of Plasma Sprayed NiCrBSi Coatings and Their Wear and Corrosion Behaviors

Coatings ◽

10.3390/coatings11020170 ◽

2021 ◽

Vol 11 (2) ◽

pp. 170

Author(s):

Songqiang Huang ◽

Jingzhong Zhou ◽

Kuoteng Sun ◽

Hailiang Yang ◽

Weichen Cai ◽

...

Keyword(s):

Laser Scanning ◽

Acid Corrosion ◽

Composite Coatings ◽

Atmospheric Plasma ◽

Confocal Laser ◽

Formation Mechanisms ◽

Temperature Oxidation ◽

Surface Protection ◽

Plasma Sprayed ◽

Nicrbsi Coatings

Nickel-based alloys are commonly used as protective coating materials for surface protection applications owing to their superior resistance to corrosion, wear and high-temperature oxidation. It is urgent to study the fundamental mechanism between the structure and corrosion properties of the Nickel-base composite coatings. This paper, therefore, focuses on clarifying the mechanisms of the microstructure influencing the acid corrosion and mechanical characteristics of the as-sprayed NiCrBSi coating and post-heat-treated coating. The formation mechanisms of the amorphous phase of flat particles during the plasma spray process were studied by using X-ray diffraction analysis, Raman spectroscopy and confocal laser scanning microscope at first. Then the evolutionary process of the corrosion structure and phase of the coating in the accelerated corrosion experiment is directly visualized by using scanning electron microscopy and energy spectrum analysis. The mechanical properties of the amorphous NiCrBSi coatings are lastly measured by microhardness and friction wear tests. The critical phenomena and results help to elucidate the relative influence of the surface features of atmospheric plasma sprayed coatings on acid corrosion responses and wear resistance, aiming at contributing to the development of a protective technique for electrical engineering.

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Effect of SiC Content on Microstructure and Tribological Properties of Plasma Sprayed TiC/Ti5Si3/Ti3SiC2 Composite Coatings

Journal of Materials Engineering and Performance ◽

10.1007/s11665-021-05529-2 ◽

2021 ◽

Vol 30 (3) ◽

pp. 2147-2158

Author(s):

Chao Li ◽

Fanyong Zhang ◽

Liping Zhao ◽

Jining He ◽

Fuxing Yin

Keyword(s):

Tribological Properties ◽

Composite Coatings ◽

Plasma Sprayed

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Fabrication and Ablation Behavior of Plasma Sprayed ZrC-W Composite Coatings

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.602-603.552 ◽

2014 ◽

Vol 602-603 ◽

pp. 552-555

Author(s):

Dan Lu ◽

Ya Ran Niu ◽

Xue Lian Ge ◽

Xue Bing Zheng ◽

Guang Chen

Keyword(s):

Thermal Conductivity ◽

Thermal Shock ◽

Plasma Spray ◽

Composite Coatings ◽

Lamellar Microstructure ◽

Atmospheric Plasma Spray ◽

Atmospheric Plasma ◽

Plasma Flame ◽

Plasma Sprayed ◽

Zrc Coating

In this work, atmospheric plasma spray (APS) technology was applied to fabricate ZrC-W composite coatings. The microstructure of the composite coatings was characterized. The influence of W content on the ablation-resistant and thermal shock properties of ZrC-W composite coatings was evaluated using a plasma flame. The results show that the ZrC-W composite coatings had typically lamellar microstructure, which was mainly made up of cubic ZrC, cubic W and a small amount of tetragonal ZrO2. The ZrC-W coatings had improved ablation resistant and thermal shock properties compared with those of the pure ZrC coating. It was supposed that the improved density, thermal conductivity and toughness of the composite coatings contributed to this phenomenon.

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Electroless Nickel-Phosphorus Composite Coatings

International Journal of Manufacturing Materials and Mechanical Engineering ◽

10.4018/ijmmme.2016010102 ◽

2016 ◽

Vol 6 (1) ◽

pp. 14-50 ◽

Cited By ~ 4

Author(s):

Prasanna Gadhari ◽

Prasanta Sahoo

Keyword(s):

Corrosion Resistance ◽

Tribological Properties ◽

Composite Coatings ◽

Electroless Nickel ◽

Friction Behavior ◽

Factors Affecting ◽

Conductive Materials ◽

Mechanical And Tribological Properties ◽

Coating Methods ◽

Soft Particles

Electroless nickel composite coatings possess excellent mechanical and tribological properties such as, hardness, wear and corrosion resistance. Composite coatings can easily be coated not only on electrically conductive materials but also on non-conductive materials like as fabrics, plastics, rubber, etc. This review emphasizes on the development of electroless nickel composite coatings by incorporating different types of hard/soft particles (micro/nano size) in the electroless Ni-P matrix to improve the mechanical and tribological properties of the coatings. The preparation of electroless bath for nickel-phosphorus composite coating, methods to incorporate hard and/or soft particles in the bath, factors affecting the particle incorporation in the coating and its effect on coating structure, hardness, wear resistance, friction behavior, corrosion resistance, and mechanical properties are discussed thoroughly.

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