Influence of Cr addition on the interface purification of vacuum brazed NiCr-Cr 3 C 2  coatings on single crystal superalloy

Wang, D.; Wang, W.Q.; Chen, X.G.; Chi, Changtai; Wang, M.S.; Han, Xu; Xie, Yanhui

doi:10.1016/j.surfcoat.2017.06.054

Cited by 16 publications

(5 citation statements)

References 18 publications

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“…The hardness of the coating increased by 50% and the wear resistance increased nearly 1.2 times than that of the substrate. Wang et al [15] prepared NiCr-Cr 3 C 2 coating with different Cr addition on the single crystal alloy surface. The effect of Cr on the microstructure and performance of NiCr-Cr 3 C 2 coating was studied.…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and performance of Nb-bearing Ni60A-Cr₃C₂ coatings manufactured by laser cladding

Ping

Sun

et al. 2019

Surface Engineering

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The Ni60A-Cr 3 C 2 coatings with different Nb addition were prepared by laser cladding. The microstructure was observed by SEM and TEM. The chemical composition of phases was studied by X-ray diffractometer and Electron Probe Micro-analyzer (EPMA). Microhardness and wear behaviour were measured by microhardness tester and wear tester, respectively. The results show that the main phases in Ni60A-Cr 3 C 2 coating are γ-Ni, Cr 7 C 3 , Cr 23 C 6 , Ni 3 Si 2 , Ni 3 B and CrB. With Nb addition, the NbC phase appears in the coatings. The size and volume fraction of NbC increase with the increase of Nb addition. The hardness and wear resistance increase first and then decrease with the increase of Nb addition. The micro-hardness of coatings with 2 wt-% Nb addition is the highest, reaching 1046.6 Hv0.2. The relative abrasive resistance of coatings with 3 wt-% Nb addition is the best, and is 2.33 times that of Nb-free coatings.

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Section: Introductionmentioning

confidence: 99%

“…Wang et al. [15] prepared NiCr-Cr 3 C 2 coating with different Cr addition on the single crystal alloy surface. The effect of Cr on the microstructure and performance of NiCr-Cr 3 C 2 coating was studied.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and performance of Nb-bearing Ni60A-Cr₃C₂ coatings manufactured by laser cladding

Ping

Sun

et al. 2019

Surface Engineering

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“…However, the diffusion and reaction of C and Si elements at the interface during the brazing process can destabilize the structure. Wang et al [62] improved the performance of vacuum brazed NiCr-Cr3C2 coatings on single crystal high temperature alloys by adjusting the Cr content to control the amount of Si or C diffusion into the base material.…”

Section: Brazing Technologymentioning

confidence: 99%

Research Status of Graphene Polyurethane Composite Coating

Zhou

Huang

2022

Coatings

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Graphene material has a variety of excellent properties and applications in energy storage, biomaterials, photoelectric devices, and other fields. With the progress of nanotechnology, graphene nanomaterials have shown their advantages in the field of new nano-corrosion coatings with their high barrier structure. In addition, polyurethane is also widely used in the field of anti-corrosion coatings due to its excellent chemical resistance, mechanical properties, and weathering resistance. The preparation of composite coatings by combining graphene nanomaterials with traditional polyurethane (PU) coatings has opened up a new way for the research and development of new anticorrotic coatings. In this paper, graphene polyurethane composite coating was first used as the research object, and the mechanism of graphene material in the new composite coating was analyzed. Then, graphene oxide (GO), a commonly used precursor material, was used as an entry point for a detailed study of the properties of GO materials and the advantages and disadvantages of its application in composites, and two types of modifications, covalent and non-covalent, were analyzed. In addition, the preparation methods and processes of graphene polyurethane composite coatings were summarized. Finally, the future research directions and research focus of GO were prospected.

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“…Jiahong et al [12] compared the effect of Cr and Ni content on the friction and wear behavior of laser cladding coated Cr-Ni alloy coatings at high temperatures and found that the increase in the Cr content is the main factor in improving the high-temperature wear resistance of CrNi alloy coatings. The results of thermal fatigue cycling studies of coatings by Wang et al [13] indicated that as the chromium content of the chromium alloy coatings increased, the total crack length of the alloy decreased, and the thermal fatigue properties of the alloys increased significantly. Friction and wear tests by Günen et al [14] and Guo et al [15] have demonstrated that the addition of appropriate amounts of Cr has a 2 of 13 strengthening effect on the properties of coatings, which is mainly reflected in the improvement of microhardness, wear resistance at high temperatures, and oxidation resistance.…”

Section: Introductionmentioning

confidence: 99%

Friction and Wear Characteristics of Cr-CNTs Composite Coating End Faces of High-Temperature Mechanical Seals

Yang,

Li,

et al. 2023

Coatings

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To improve the reliability of the end faces of high-temperature mechanical seals, a high-performance composite material that introduces carbon nanotubes (CNTs) into the laser-melted Cr coating is proposed. In this study, for high-temperature and high-speed mechanical seals under actual working conditions, friction and wear tests were conducted under different working conditions and using different end face materials. The high-temperature tribological properties of the Cr-CNTs coatings were analyzed, and the strengthening mechanism of the Cr-CNTs coatings on end faces was investigated. The results indicate that the wear resistance of the Cr-CNTs coating at high temperatures is first enhanced and then weakened with the increase in the CNTs content. The composite coating end face performance is optimal when the CNTs content is 10 wt%. The presence of CNTs between the end faces when grinding against the graphite ring favors the generation of a graphite film. The coefficient of friction of the Cr-CNTs coating is reduced by at least 12.46% compared to the Cr coating at a temperature of 483 K. This study provides reference examples for the application of carbon nanotubes in high-performance mechanical seals and new research ideas for improving the performance of mechanical seal end faces.

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Influence of Cr addition on the interface purification of vacuum brazed NiCr-Cr 3 C 2 coatings on single crystal superalloy

Cited by 16 publications

References 18 publications

Microstructure and performance of Nb-bearing Ni60A-Cr₃C₂ coatings manufactured by laser cladding

Microstructure and performance of Nb-bearing Ni60A-Cr₃C₂ coatings manufactured by laser cladding

Research Status of Graphene Polyurethane Composite Coating

Friction and Wear Characteristics of Cr-CNTs Composite Coating End Faces of High-Temperature Mechanical Seals

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Influence of Cr addition on the interface purification of vacuum brazed NiCr-Cr 3 C 2 coatings on single crystal superalloy

Cited by 16 publications

References 18 publications

Microstructure and performance of Nb-bearing Ni60A-Cr3C2 coatings manufactured by laser cladding

Microstructure and performance of Nb-bearing Ni60A-Cr3C2 coatings manufactured by laser cladding

Research Status of Graphene Polyurethane Composite Coating

Friction and Wear Characteristics of Cr-CNTs Composite Coating End Faces of High-Temperature Mechanical Seals

Contact Info

Product

Resources

About

Microstructure and performance of Nb-bearing Ni60A-Cr₃C₂ coatings manufactured by laser cladding

Microstructure and performance of Nb-bearing Ni60A-Cr₃C₂ coatings manufactured by laser cladding