Microstructure and Properties of Ni–Co Composite Cladding Coating on Mould Copper Plate

Liu, Yu; Liu, Ying; Gao, Yali; Dong, C.Y.; Wang, Shoubo

doi:10.3390/ma12172782

Cited by 14 publications

(5 citation statements)

References 17 publications

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“…Commercially pure Ni powder with average particle size below 10 µm was mixed with ethyl alcohol and then was preplaced in the form of a paste with a thickness of about 0.15 mm onto the sandblasted cp Cu substrate. The preplaced layer of Ni on cp Cu can prevent its high reflectivity [ 16 , 17 , 18 , 19 ].…”

Section: Methodsmentioning

confidence: 99%

Investigation of the Implementation of Laser Surface Alloying of Cu with Cr–WC

et al. 2022

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This paper presents research on the microstructure and mechanical properties of an alloyed composite copper (Cu) surface layer, reinforced with a mixture of chromium–tungsten carbide (Cr–WC) powders. Copper alloying was performed using a high-power diode laser (HPDL). In the tests, three mixtures of powders with different percentage contents (75%Cr 25%WC, 50%Cr 50%WC, 25%Cr 75%WC) were injected into the melting pool during the laser surface alloying process. Microstructural evolution and the properties of the surface layer of copper after laser alloying were investigated. Structural investigations were performed using light microscopy, scanning and transmission electron microscopy (SEM, TEM) and X-ray diffraction (XRD). Microhardness and wear resistance of the modified surface layer were examined as well. After laser treatment the applied powders appear as uniformly distributed particles in the alloyed zone as well as nanoscale precipitates in the Cu matrix. Several types of precipitate characteristics, in terms of morphology, structure and chemical composition, were observed. Laser alloying of the surface layer modified the microstructure, which resulted in an increase in the hardness of the surface layers compared to the base material.

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Section: Methodsmentioning

confidence: 99%

Investigation of the Implementation of Laser Surface Alloying of Cu with Cr–WC

et al. 2022

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“…An obvious interface can be seen between coatings and substrates, and there are also some cracks and pores at the interface or in the coatings that are harmful to the properties and service life of coatings. According to the reports from Liu et al [35], the formation of these cracks and pores is usually the result of the overheating of the molten pool, gas entrapment, surface impurities, etc. In coating A, vertical cracks perpendicular to the interface were also observed.…”

Section: Characterization Of the Surfacesmentioning

confidence: 99%

Characterization of the Structure and Wear Resistance of Ni65-Based Coatings via HVOF Flame Spraying and Its Application to Potato Digging Shovels

Wang

et al. 2022

Coatings

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To improve the tribological properties of a potato digging shovel (PDS), Ni65-based coatings with rare earth oxides additions were fabricated on 65Mn# steel via High-Velocity Oxygen-Fuel (HVOF) flame spraying, the effect of macroscopic surface shape of PDSs on their wear resistance of PDSs was examined, and finally a kind of PDS with a specific macroscopic surface shape and satisfied wear resistance was obtained. The addition of CeO2 and Y2O3 decreased the defects in coatings, refined the microstructure, made hard phases distributed more uniformly and ultimately improved coating properties. According to the XRD analysis results, the Ni65-based coatings were composed of the matrix phase γ-Ni and hard phases formed by Cr, Fe and Ni with B, C and Si. More Cr7C3 phases were detected in coating B than in coating A, but the phases related to Y and Ce were also not detected because of the low content in both EDS and XRD analyses. Heat treatment and HVOF flame sprayed coatings both increased the hardness of specimens, and coating A (621HV1.0) provided a hardness nearly equivalent to that of the heat treatment specimens (617HV1.0), while coating B provided the highest hardness (664HV1.0). For all specimens, laser surface texturing (LST) structures weakened their corrosion resistance. However, the Ni65-based self-fluxing alloy coatings significantly improved the corrosion resistance of specimens, and coating B provided the best corrosion resistance. SEM images show that the main wear mechanism for worn specimens was abrasive wear, and less wear signs were observed on the surface of coating B. Abrasive wear examinations indicate that specimen BJ had the best wear resistance and, compared with specimen W, the mass loss of specimen BJ decreased by 28.56% and 20.83% at relative sliding speeds of 2.35 m/s and 3.02 m/s, respectively. However, considering the negative effect of LST structures on the corrosion resistance of specimens, the processing techniques of specimen A and specimen B are more applicable to PDSs. The macroscopic surface shapes affected the wear resistance of PDSs and ZF had the lowest mass loss but the highest draught force; comparatively, YS had a better balance on the draught force reduction and wear resistance. Finally, YS with coating B, which decreased the mass loss by more than 27.17%, is recommended in this paper. On the whole, the conclusions in this paper provide a reference for the design of potato digging shovels with lower draught force and better tribological properties.

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“…The pump peristalsis rate is too low, the feeding speed is slow, the droplet is small and the drying efficiency is low; The pump peristalsis rate is too high, the droplet is too large, and the particle spheroidization degree is poor after drying. Therefore, this paper takes the inlet temperature, pump creep rate and solid content as the research objects, selects the inlet temperature of 165 ℃、 175 ℃ and 185 ℃, 30%、40% creep rate, takes the surface morphology of dried Sm2zr2o7particles as the characterization to obtain the optimized spray granulation process [9].…”

Section: Introductionmentioning

confidence: 99%

Study on spray drying process of Sm2Zr2O7 slurry for thermal spraying

Hao¹,

Li²,

Zhang³

et al. 2023

Fourth International Conference on Optoelectronic Science and Materials (ICOSM 2022)

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A new type of Sm2Zr2O7 ceramic material has become a candidate material for thermal barrier coating because of its low thermal conductivity, high thermal expansion coefficient and good high temperature structure stability. In this paper, the effects of different process parameters on the morphology of ceramic powders were investigated. The spray drying technology was used to prepare Sm2Zr2O7 agglomerated powder. The micro morphology of Sm2Zr2O7 powder after granulation was observed by SEM. The effects of inlet temperature, pump creep rate on the characteristics of agglomerated powder were analyzed. At the same time, the effects of slurry properties on the micro characteristics of powder after granulation were discussed. The optimized Sm2Zr2O7 spray granulation process was determined as inlet temperature 175 ℃, pump creep rate 30% .

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Microstructure and Properties of Ni–Co Composite Cladding Coating on Mould Copper Plate

Cited by 14 publications

References 17 publications

Investigation of the Implementation of Laser Surface Alloying of Cu with Cr–WC

Investigation of the Implementation of Laser Surface Alloying of Cu with Cr–WC

Characterization of the Structure and Wear Resistance of Ni65-Based Coatings via HVOF Flame Spraying and Its Application to Potato Digging Shovels

Study on spray drying process of Sm2Zr2O7 slurry for thermal spraying

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