Laser cladding Ni–Co duplex coating on copper substrate

Liu, Fang; Liu, Changsheng; Chen, Suiyuan; Tao, Xingqi; Zhang, Yong

doi:10.1016/j.optlaseng.2010.02.009

Cited by 46 publications

(20 citation statements)

References 16 publications

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“…In order to improve the bonding strength and reduce the crack sensitivity of copper substrate and Co-based coating, preparation of transition layers might act as a recipe [14][15][16][17]. For example, Liu et al [14] successfully prepared crack-free Ni-Co biphasic coating on copper substrates by continuous laser cladding of Ni-based and Co-based coatings. Chen et al [15] prepared Ni/Co based alloy coating with high wear resistance of gradient on the surface of copper alloy by YAG laser in situ induction reaction method.…”

Section: Introductionmentioning

confidence: 99%

Study of laser cladding Fe–Co duplex coating on copper substrate

Sun

Qiao

et al. 2020

Mater. Res. Express

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Fe-Co duplex coating has been successfully deposited onto pure copper surface by Nd:YAG laser cladding. The morphology and microstructure were investigated by optical microscopy (OM), scanning electron microscopy (SEM) and x-ray diffraction (XRD). Mechanical properties of the samples have been evaluated by microhardness measurement and wear properties. Experimental results showed that the coating was free of cracks and voids, and good metallurgical bonded to the substrates. The surface of the Fe-Co duplex coating was mainly composed of α-Co solid solution, CoC x , Fe 0.64 Ni 0.36 and a number of carbides. The microhardness of the Co-based coating reached 438.6 HV 0.2 , which was about 5 times of Cu substrate (90.5 HV 0.2 ). The wear test showed the average wear rate of Fe-Co duplex coating was 19.8% of that of copper matrix. The hardness and wear resistance of the Fe-Co duplex coating was significantly improved.

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Section: Introductionmentioning

confidence: 99%

Study of laser cladding Fe–Co duplex coating on copper substrate

Sun

Qiao

et al. 2020

Mater. Res. Express

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“…Ng et al [8] demonstrated laser cladding of a two-layer coating in which a nickel layer was sandwiched between Cu and molybdenum (Mo) substrates. A 2-kilowatt CW Nd:YAG laser with a diameter of 1 mm was used in their study.…”

Section: Introductionmentioning

confidence: 99%

Laser cladding of nickel-based alloy coatings on copper substrates

Balu

Rea

Deng³

2015

SPIE Proceedings

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The wear resistance of high-value copper components used in the metal casting, automotive, aerospace and electrical equipment industries can be improved by applying nickel (Ni)-based coatings through laser cladding. A high-power diode laser array providing continuous power levels up to 10 kilowatts with beam-shaping optics providing a rectangular focal region of various dimensions was used to deposit Ni-based alloy coatings with controlled thickness ranging from 0.3 mm to 1.6 mm in a single pass on copper (Cu) substrates. Slotted powder feeding plates with various discrete widths delivered uniform streams of powdered metal particles entrained in a carrier gas, matching the selected focal spot dimensions. To enhance laser beam coupling with the substrate and to avoid defects such as cracks, delamination and porosity, Cu substrates were preheated to a temperature of 300°C. The effect of heat input on microstructure of the cladding and extent of the heat-affected zone (HAZ) was evaluated using optical microscopy and scanning electron microscopy. Excessive heat input with longer interaction time increased dilution, porosity and expanded HAZ that significantly reduced the hardness of both the clad and the Cu substrates. Average microhardness of the Ni-C-B-Si-W alloy coating was 572 HV, which was almost 7 times greater than the hardness of the Cu substrate (84 HV). IntroductionCopper (Cu) and its alloys are widely used in metal casting, marine, automotive and electrical equipment industries due to a combination of very high conductivity (both thermal and electrical) and good corrosion resistance. However, these materials are not good candidates for applications involving casting and rolling that demand both high wear resistance and good thermal conductivity, because of their low hardness and poor tribological properties. In order to enhance the wear resistance of Cu-based material in such applications, it is common practice to coat nickel (Ni)-based high performance materials using various techniques such as chemical plating, electro-plating, plasma transferred arc (PTA), thermal spray and laser cladding (LC). Among these techniques, both PTA and LC are capable of producing a metallurgical bond between the substrate and coating. It is reported [1] that PTA can produce thicker metal deposits with lower production costs than LC. However, the development of cost-effective, high-power direct diode laser-based cladding capable of producing deposition rates up to 30 lb/hr now makes LC competitive with PTA. Furthermore, LC with a high-power direct diode laser offers controlled heat input with increased throughput (via large-area cladding) and good wall-plug efficiency resulting in overall cost reduction when fabricating high-performance coatings.Cu-based alloys are generally excellent reflectors and poor absorbers of visible and near-infrared light, which is typically not favorable for laser processing. The variation of the room-temperature optical absorption with wavelength for Cu and Ni is shown in Figure 1. A sharp drop in...

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“…Also electrodeposition of Ni-Co alloy coatings is a simple and economic to not need high temperature and high pressure. So there is a wide range of industrial applications [6][7][8][9][10][11][12]. Also there is less work on corro sion of Ni-Co coating in literature comparing wear 1 The article is published in the original.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ni-Co alloy coating on corrosion behavior of 0.8% C steel

Ünal

Zor

Erten

et al. 2015

Prot Met Phys Chem Surf

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Ni-Co alloy was electrodeposited on high carbon steel (0.8% C) in acidic bath. Corrosion behav ior of uncoated steel and Ni-Co coated was investigated in 3% NaCl. For this purpose, electrochemical methods such as potentiodynamic polarization, linear polarization (LP), chronoamperometry (CA), open circuit potential (OCP) and time dependent (1th, 4th, 24th, 48th and 72nd hour) impedance spectrometry (EIS) measurement were used. Corrosion surfaces of Ni-Co alloy coated and uncoated steels, which were immersed in 3% NaCl solution, after the first day and fifth day was investigated by SEM. As a result, it is con cluded that Ni-Co alloy coated decrease the steel corrosion.

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Laser cladding Ni–Co duplex coating on copper substrate

Cited by 46 publications

References 16 publications

Study of laser cladding Fe–Co duplex coating on copper substrate

Study of laser cladding Fe–Co duplex coating on copper substrate

Laser cladding of nickel-based alloy coatings on copper substrates

Effect of Ni-Co alloy coating on corrosion behavior of 0.8% C steel

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