Effects of Particle Size on the Microstructure and Mechanical Properties of HVAF-Sprayed Al-Based Quasicrystalline Coatings

Xiao, Meng; Liu, Xiaoqing; Zeng, Sihui; Zheng, Zhigang; Wang, Gang; Qiu, Zhaoguo; Liu, Min; Zeng, Dechang

doi:10.1007/s11666-021-01202-1

Cited by 16 publications

(17 citation statements)

References 23 publications

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“…In recent years, decoupling methods have been used to calculate particle behavior in HVO/AF processes. [10][11][12][13][14][15] Ref. [18] considered the coupling effect between the particles and the gaseous flame in the dual-stage HVOF spraying, which also found that the particles are accelerated while the speed of powder feeding carrier gas decreased.…”

Section: Discrete Phase Modelmentioning

confidence: 99%

“…In recent years, decoupling methods have been used to calculate particle behavior in HVO/AF processes 10–15 . Ref.…”

Section: Theoretical Basis Of Hvaf Spraying Modelingmentioning

confidence: 99%

“…Ma et al 10 compared coatings prepared by the different spraying methods of HVOF and AC-HVAF, which found that the AC-HVAF coating formed a stable and wear-resistant surface due to the formation of a dense and complete amorphous structure. In 2021, Xiao et al 11 studied the effect of particle size on the coating microstructure and properties by experiments. The coatings prepared with finer particles were found to be more tightly bound and less porous, while coarse particles helped to maintain the crystalline phase of the coating.…”

Section: Introductionmentioning

confidence: 99%

“…compared coatings prepared by the different spraying methods of HVOF and AC‐HVAF, which found that the AC‐HVAF coating formed a stable and wear‐resistant surface due to the formation of a dense and complete amorphous structure. In 2021, Xiao et al 11 . studied the effect of particle size on the coating microstructure and properties by experiments.…”

Section: Introductionmentioning

confidence: 99%

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Research of numerical simulation for HVAF thermal spraying process on rotational roll

Chang

Chen

Han

et al. 2023

Int J Applied Ceramic Tech

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HVAF thermal spraying has the characteristics of low spraying temperature, high coating density, and strong corrosion resistance. It is widely used in the aerospace, iron–steel metallurgy, national defense and military industry, petrochemical industry, and other fields for manufacturing protection and repair strengthening, which has achieved significant economic benefits. In this study, a numerical model of HVAF thermal spraying on a circular roll was established by the computational fluid dynamics method. The characteristics of the spraying flame, evolution of the gas composition mass fraction, and influence of the spraying parameters on particle flight behaviors were calculated and revealed. Based on the dynamic mesh method, the effect of roll speed on the spraying flame characteristics and particle flight behaviors was analyzed. Calculations show that the spraying flame is extruded at the Laval nozzle and the speed rapidly increases to 805 m/s, which increases to a supersonic speed through the barrel. The flame flow rises rapidly reaching the surface of the roll, which is 780 m/s. The highest temperature is in the combustion chamber, and the flame temperature of the airshed is a damped vibration. The flame covers the surface of the roll to preheat it, and the flame temperature there decreases layer by layer from the inside to outside. The particle diameter significantly effects the powder flight behavior. The flame velocity increases with the barrel length increasing. The flame temperature up to the peak when the barrel length is 190 mm. As the rotation speed of the roll increases, the temperature, velocity, and pressure of the flame flow on the roll surface change in a certain extent. The particle spatter will be increased with the rotational speed increasing of the roll, which little affects the particle temperature.

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Section: Discrete Phase Modelmentioning

confidence: 99%

“…In recent years, decoupling methods have been used to calculate particle behavior in HVO/AF processes 10–15 . Ref.…”

Section: Theoretical Basis Of Hvaf Spraying Modelingmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Research of numerical simulation for HVAF thermal spraying process on rotational roll

Chang

Chen

Han

et al. 2023

Int J Applied Ceramic Tech

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“…Thus, a magnetron sputtering [16], electron beam (EB) PVD technique [17,18], or plasma spraying [19][20][21][22][23][24] were used to produce the QC coatings. It was shown that their hardness and wear resistance values are comparable to or even higher than that of the natural composites containing QC particles distributed in the bcc β-phase [25][26][27][28][29], multi-phase alloys, or artificial Al-based composite layers containing QC particles [30][31][32]. The corrosion resistance of the QC coatings was shown to be high and comparable with that of stainless steel [33][34][35].…”

Section: Introductionmentioning

confidence: 99%

Protection of AA2024 alloy against wear and corrosion by HVAF sprayed AlCuFe coating

Wang

Iefimov

et al. 2023

Surface Engineering

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Quasicrystalline (QC) AlCuFe coating is produced on the AA2024 alloy using high-velocity airfuel (HVAF) spraying. The HVAF sprayed coatings are studied in as-deposited and subsequently annealed (400°C, 1 h) states. XRD, SEM, and EDX analysis revealed a two-phase microstructure comprising QC icosahedral ψ-phase (the volume fraction of ∼75%) and interlayered bcc βphase that remains the same as that in a water-atomized AlCuFe powder used as feeding material. The used annealing exerts a negligible effect on the protective properties of the HVAF coating that possesses good adhesion strength (>12 MPa), a high HV microhardness (7.1 ± 0.2 GPa), nanohardness (11.1 ± 0.2 GPa), elastic modulus (169 GPa), the essentially lowered wear losses (0.71 μm), coefficient of friction (CoF≈0.03), and corrosion current density (6.7 μm cm −2 ) in a 3.5%NaCl medium. These characteristics are much better than those of the original AA2024 alloy.

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Three-dimensional interfacial fracture analysis of a one-dimensional hexagonal quasicrystal coating

Zhang

Zhao

Fan

et al. 2022

Appl. Math. Mech.-Engl. Ed.

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In this paper, the three-dimensional (3D) interfacial fracture is analyzed in a one-dimensional (1D) hexagonal quasicrystal (QC) coating structure under mechanical loading. A planar interface crack with arbitrary shape is studied by a displacement discontinuity method. Fundamental solutions of interfacial concentrated displacement discontinuities are obtained by the Hankel transform technique, and the corresponding boundary integral-differential equations are constructed with the superposition principle. Green’s functions of constant interfacial displacement discontinuities within a rectangular element are derived, and a boundary element method is proposed for numerical simulation. The singularity of stresses near the crack front is investigated, and the stress intensity factors (SIFs) as well as energy release rates (ERRs) are determined. Finally, relevant influencing factors on the fracture behavior are discussed.

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Effects of Particle Size on the Microstructure and Mechanical Properties of HVAF-Sprayed Al-Based Quasicrystalline Coatings

Cited by 16 publications

References 23 publications

Research of numerical simulation for HVAF thermal spraying process on rotational roll

Research of numerical simulation for HVAF thermal spraying process on rotational roll

Protection of AA2024 alloy against wear and corrosion by HVAF sprayed AlCuFe coating

Three-dimensional interfacial fracture analysis of a one-dimensional hexagonal quasicrystal coating

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