Laser post annealing of cold-sprayed Al/alumina–Ni composite coatings

Podrabinnik, Pavel; Grigoriev, Sergey N.; Shishkovsky, Igor

doi:10.1016/j.surfcoat.2014.11.042

Cited by 17 publications

(10 citation statements)

References 18 publications

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“…The melting of Al will greatly facilitate the reaction diffusion of Ni atoms into Al, besides the conventional solid-state atomic diffusion. Moreover, Podrabinnik et al227 observed AlNi and Al3Ni2 intermetallics in laser annealed CS Al/Al2O3-Ni composite coating. The phase transformation from a Ni-Al composite to NiAl intermetallic can also result in closing non-bonded gaps in the coating at higher temperatures,228…”

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confidence: 98%

A Review of Advanced Composite and Nanostructured Coatings by Solid-State Cold Spraying Process

Assadi

Gaertner

et al. 2018

Critical Reviews in Solid State and Materials Sciences

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Cold spraying (CS) has been widely explored over the last decade due to its low process temperature and limited thermal effect on spray materials. As a solid-state process, the inherent deficiencies of traditional thermal spraying such as oxidation, decomposition and grain growth are avoided. This article summarizes the research work on the fabrication of composites and nanostructured coatings by the promising CS process. After a brief introduction to CS and its deposition mechanisms, the preparation methods of spray powders are classified. Different methods are appropriate for particles of various properties, and the tendency is to design composite powders by combined methods in order to create coatings with specified properties. Then the co-deposition mechanism of composite particles as well as research findings on metal-metal, metal-ceramic and metal-intermetallic composite coatings are reviewed concerning the deposition characteristics, microstructure and its relation to properties. Moreover, CS has been used to deposit a variety of nanostructured materials, including metals, metal-ceramic composites, and even ceramics, retaining their nanocrystalline nature in the coating without grain growth or phase transformation. Finally, the potential applications of CS and issues to be addressed in coating deposition are discussed.

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confidence: 98%

A Review of Advanced Composite and Nanostructured Coatings by Solid-State Cold Spraying Process

Assadi

Gaertner

et al. 2018

Critical Reviews in Solid State and Materials Sciences

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“…The surface and cross-section morphology of cold sprayed Al coating before and after LR is shown in Figure 1 a,b. The cold sprayed Al particles appeared as an obvious deformation when impacting on the substrate at high speed, which were distributed on the substrate as flat strips, and they were mechanically embedded with the substrate [ 23 , 24 ]. The Al particles were closely combined, and there was a clear interface between the particles, with no obvious porosity on the Al coating surface.…”

Section: Analysis and Discussion Of Resultsmentioning

confidence: 99%

Effect of Laser Remelting on Friction-Wear Behaviors of Cold Sprayed Al Coatings in 3.5% NaCl Solution

Dejun

2018

Materials

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A cold sprayed Al coating on S355 structural steel was processed using a laser remelting (LR). The surface and cross-section morphologies, chemical compositions, and phases of as-obtained Al coating before and after LR were analyzed using a scanning electronic microscope (SEM), energy dispersive spectrometer (EDS), and X-ray diffractometer (XRD), respectively, and their hardness was measured using a micro-hardness tester. The friction-wear behaviors of Al coating before and after LR in 3.5% NaCl solution were conducted to simulate the sand and gravel scouring on its surface in seawater, the effects of wear loads and speeds on the tribological properties of Al coating were analyzed, and the wear mechanisms under different wear loads and speeds were also discussed. The results show that the Al coating after LR is primarily composed of an Al phase and its hardness is 104.66 HV, increasing 54.70 HV than the cold sprayed Al coating. The average coefficient of friction (COF) of cold sprayed Al coating at the wear load of 0.5, 1.0 and 1.5 N is 0.285, 0.239, and 0.435, respectively, while that after LR is 0.243, 0.227, and 0.327, respectively, decreased by 14.73%, 5.02% and 24.83% compared to the cold sprayed Al coating. The wear rate of cold sprayed Al coating at the wear load of 0.5, 1.0 and 1.5 N is 1.60 × 10−4, 2.36 × 10−4, and 2.40 × 10−4 mm3/m·N, respectively, while that after LR is 1.59 × 10−4, 1.70 × 10−4, and 1.94 × 10–4 mm3/m·N, respectively, decreased by 1%, 32%, and 23%, respectively, indicating that LR has high anti-friction performance. Under the wear load action of 1.0 N, the average COF of laser remelted Al coating at the wear speeds of 300, 400 and 500 times/min is 0.294, 0.279, and 0.239, respectively, and the corresponding wear rate is 1.06 × 10−4, 1.24 × 10−4, and 1.70 × 10−4 mm3/m·N, respectively. The wear mechanism of cold sprayed Al coating is primarily corrosion wear at the loads of 0.5 and 1.0 N, and that at the load of 1.5 N is abrasive wear and fatigue wear; while that after LR is abrasive wear and fatigue wear, with no corrosion wear, showing that LR improves its corrosion and wear resistance.

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“…[6,7], alloys (Al alloys [8], Ti alloys [9,10], Ni alloys [11], Al/Si [12,13], Ni/Cr [14], W/Ni/Fe [15], etc. ), and composite coatings (Al-Al 2 O 3 [16], Al-SiC [17], Ni-Al-Al 2 O 3 [18], Ni-Cu-diamond [19], 316 L-Cu [20], Cu-Ni-Al [21], etc.). In contrast to high-pressure systems, low-pressure systems ( P = 0.3–1.0 MPa) have lower accelerating gas pressures, temperatures, and achievable impact velocities [4].…”

Section: Introductionmentioning

confidence: 99%

Effect of reinforcement particles on cold-sprayed Al-based coatings

Li¹,

Wu²,

Ding³

et al. 2021

Surface Engineering

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In this study, malleable and heavy Ta particles were introduced into soft Al powders to prepare Al-Ta composite coatings through a low-pressure cold-spray process; for comparison, Al-A 2 O 3 composite coatings were also deposited. The surface and cross-sectional morphologies, deposition efficiency, microstructure, hardness and composition of the coatings were investigated. The results demonstrated that the Al-Ta coatings had roughness values that were almost twice as large as those of the Al-Al 2 O 3 coatings for the same volumetric fraction of reinforcement particles used in the feedstock. Ta particles were more effective in improving the deposition efficiency and densification than were Al 2 O 3 particles. The formation mechanism of the Al-Ta coatings was mainly attributed to the malleable and heavy nature of Ta particles, which allowed them to bond with the formed coating and impact the coating strongly through the peening effect.

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Laser post annealing of cold-sprayed Al/alumina–Ni composite coatings

Cited by 17 publications

References 18 publications

A Review of Advanced Composite and Nanostructured Coatings by Solid-State Cold Spraying Process

A Review of Advanced Composite and Nanostructured Coatings by Solid-State Cold Spraying Process

Effect of Laser Remelting on Friction-Wear Behaviors of Cold Sprayed Al Coatings in 3.5% NaCl Solution

Effect of reinforcement particles on cold-sprayed Al-based coatings

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