Study on Microstructure and Tribological Performance of Diamond/Cu Composite Coating via Supersonic Laser Deposition

Wu, Lijuan; Zhang, Gang; Li, Bo; Wang, Weilin; Xuanjie, Huang; Chen, Zhijun; Dong, Gang; Zhang, Qunli; Yao, Jianhua

doi:10.3390/coatings10030276

Cited by 8 publications

(7 citation statements)

References 43 publications

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“…The COF of TiC composites with Cu pairing at 400 rpm/min under 5 N is 0.45-0.55. The average COF of diamond/Cu composites is about 0.55 under a load of 6 N [2]. The COF increases to 0.7 with the increase of load up to 8 N. This is mainly because the adhesive wear with the increase of load increases substantially.…”

Section: Cumentioning

confidence: 94%

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In Situ Synthesis and Tribological Characterization of TiC–Diamond Composites: Effect of the Counterface Material on Wear Rate and Mechanism

Chen,

Li,

et al. 2024

Coatings

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TiC bonded diamond composites were prepared from a mixture of Ti, graphite, and diamond powders as raw materials, with Si as sintering additives, through high-temperature and high-pressure (HTHP) technology. The reaction between Ti and graphite under 4.5–5 GPa pressure and 1.7–2.3 kW output power can produce TiC as the main phase. The diamond particles are surrounded by TiC, and the interface is firmly bonded. The coefficient of friction (COF) of TiC–diamond composites with POM and PP balls decreases with increasing load for a specific friction velocity. However, the COF of TiC–diamond composites with agate, Cu and Al balls increases with the rising load because of the enhanced adhesive wear effect. The COF of PP, Cu and Al balls slightly increases with the increase in friction velocity at a certain load. SEM results show that the surface of agate balls has rough, pear-shaped grooves and shallow scratches. The scratches on the surface of POM balls are wrinkled. The PP balls have pear-shaped groove scratches on their wear surfaces. The wear mechanism of TiC–diamond composites with Cu ball pairs is primarily adhesive wear. The abrasion of TiC–diamond composites with Cu ball pairs remains almost unchanged as the load increases. However, the depth and width of the pear-shaped grooves on the wear surface of TiC–diamond composites are significantly increased. This phenomenon may be attributed to the high rotational speed, which helps to remove the residual abrasive debris from the friction grooves. As a result, there is a decrease in both the depth and width of the pear-shaped grooves, leading to a smoother overall surface. The wear mechanism of TiC–diamond composites with Al ball pairs is abrasive wear, which increases with an increasing load. When the load is constant, as the speed increases, the wear morphology of TiC–diamond composites with Al ball pairs transitions from rough to smooth and then back to rough again. This phenomenon may be attributed to the wear mechanism at low speeds being groove wear and adhesive wear. As the speed increases, the wear particles are more easily removed from the wear track, leading to a reduction in abrasiveness. As the speed increases, the wear surface becomes roughened by a combination of grooves and dispersed wear debris. This can be attributed to the increased dynamic interaction between surfaces caused by higher speed, resulting in a combination of abrasive and adhesive wear. In addition, Cu and Al ball wear debris appeared as irregular particles that permeated and adhered to the surface of the TiC phase among the diamond particles. The results suggest that TiC–diamond composites are a very promising friction material.

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Section: Cumentioning

confidence: 94%

“…Diamond composites with high thermal conductivity, high hardness, high modulus, and additional excellent characteristics are widely employed in aerospace, new energysaving automobiles, abrasives, nuclear fusion, and other fields [1]. Diamond composites are made by sintering a mixture of diamond and bonding materials under HTHP [2,3].…”

Section: Introductionmentioning

confidence: 99%

In Situ Synthesis and Tribological Characterization of TiC–Diamond Composites: Effect of the Counterface Material on Wear Rate and Mechanism

Chen,

Li,

et al. 2024

Coatings

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“…The Ti−coated diamond/copper composite coatings were fabricated onto the copper substrate using an in−house SLD system. The system was mainly composed of a six−axis mechanical arm, powder feeder, high pressure nitrogen station, water cooling system, gas heating device, and laser system (LDF6000−100 VGP, Laserline, Koblenz, Germany) [7]. The schematic of the fabrication via SLD is shown in Figure 2.…”

Section: Composite Fabricationmentioning

confidence: 99%

“…This was mainly due to the chemical reaction between Ti and carbon on the surface of the diamond to generate chemical bonding, which would protect the diamond and improve the wettability with copper in coating preparation using SLD. The titanium element reacted with the diamond in the molten salt through the following equations [7]:…”

Section: Composition and Morphology Of Metallized Diamondmentioning

confidence: 99%

“…The increased mechanical performances of diamond/copper composite indicate the remarkable improvements of the composite, which can acquire the benefits of both diamond and copper [5,6]. The ductility of the copper matrix provides the machinability of the composite, while the diamond-reinforced phase improves the wear resistance of the composite [7]. However, the poor wettability between diamond and copper causes the composite interface to have obvious defects, which seriously affect the performance of the composite [8].…”

Section: Introductionmentioning

confidence: 99%

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Tribological Behavior of Ti-Coated Diamond/Copper Composite Coating Fabricated via Supersonic Laser Deposition

Zhang

Chen

et al. 2023

Lubricants

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Diamond/copper composite coating is promising for wear-resistant applications, owing to the extreme hardness of the diamond reinforcement. Ti-coated diamond/copper composite coatings with various laser powers were successfully fabricated employing the novel manufacturing technology of supersonic laser deposition (SLD). Ti-coated diamond, which was able to enhance the wettability between diamond and copper, was prepared at the optimal parameters via salt bath. Nano-spherical titanium carbides were uniformly distributed on the diamond’s surface to generate a favorable interface bonding with a copper matrix though mechanical interlocking and metallurgical bonding during impact. Furthermore, the results showed that the transition layer acted as a buffer, preventing the breakage of the diamond in the coating. SLD can prevent the graphitization of the diamonds in the coating due to its low processing temperature. The coordination of laser and diamond metallization significantly improved the tribological properties of the diamond/copper composite coatings with the SLD technique. The microhardness of the diamond/copper composite coating at a laser power of 1000 W reached about 172.58 HV0.1, which was clearly harder than that of the cold sprayed copper. The wear test illustrated that the diamond/copper composite coating at a laser power of 1000 W exhibited a low friction coefficient of 0.44 and a minimal wear rate of 11.85 μm3·N−1·mm−1. SLD technology shows great potential in the field of preparing wear-resistant hard reinforced phase composite coatings.

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Strengthening Strategies for Cold Sprayed Deposits

Yin

Lupoi

2021

Springer Tracts in Additive Manufacturing

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Study on Microstructure and Tribological Performance of Diamond/Cu Composite Coating via Supersonic Laser Deposition

Cited by 8 publications

References 43 publications

In Situ Synthesis and Tribological Characterization of TiC–Diamond Composites: Effect of the Counterface Material on Wear Rate and Mechanism

In Situ Synthesis and Tribological Characterization of TiC–Diamond Composites: Effect of the Counterface Material on Wear Rate and Mechanism

Tribological Behavior of Ti-Coated Diamond/Copper Composite Coating Fabricated via Supersonic Laser Deposition

Strengthening Strategies for Cold Sprayed Deposits

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