Evaluating strength of thermally sprayed Al2O3 on aluminum

Arai, Masatsugu; Furuse, Muneo

doi:10.1016/j.vacuum.2009.09.010

Cited by 6 publications

(2 citation statements)

References 4 publications

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“…The heat transfer coefficient on the scale surface was assumed to be 1 100 W/m 2 K, and the thermal conductivity in the scale layer was assumed to be constant regardless of the temperature and scale thickness. The calculated thermal conductivity of the artificial scale layer of Al 2 O 3 was 1.4 W/mK, which was much smaller than the 32 W/mK value of a sintered body, 11) but slightly close to the 3 W/mK of a thermal spraying layer. 12) Takeuchi et al 12) stated that the binding rate of Al 2 O 3 particles in a thermal spraying layer is smaller than that of a sintered body.…”

Section: Effect Of Scale Thickness On Spray Coolingmentioning

confidence: 64%

Effects of Surface Conditions on Spray Cooling Characteristics

Fukuda¹,

Nakata²,

Kijima³

et al. 2016

ISIJ Int.

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Section: Effect Of Scale Thickness On Spray Coolingmentioning

confidence: 64%

Effects of Surface Conditions on Spray Cooling Characteristics

Fukuda¹,

Nakata²,

Kijima³

et al. 2016

ISIJ Int.

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“…It was provided by Hangzhou Wanjingxin Material Co. Ltd. The Al 2 O 3 ceramic coating with a thickness of 300 µm on the TC4 alloy surface was prepared via thermal spraying [31,32], and a sample with a size of 4 × 4 × 1.7 mm 3 was obtained. The experiments were conducted on laser equipment, which included a 4 kW FEIBO fiber laser, and a KUKA robot working table.…”

Section: Methodsmentioning

confidence: 99%

Numerical Simulation and Experimental Investigation of Laser Ablation of Al2O3 Ceramic Coating

et al. 2020

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This paper presents an evaluation of the molten pool laser damage done to an Al2O3 ceramic coating. Mechanism analysis of the laser damage allowed for a 2D finite element model of laser ablation of the Al2O3 ceramic coating to be built. It consisted of heat transfer, laminar flow, and a solid mechanics module with the level set method. Results showed that the laser damage mechanisms through laser ablation were melting, gasification, spattering, and micro-cracking. The ablation depth and diameter increased with the increasing laser ablation time under continuous irradiation. The simulation profile was consistent with the experimental one. Additionally, the stress produced by the laser ablation was 3500–9000 MPa, which exceeded the tensile stress (350–500 MPa), and fracturing and micro-cracks occurred. Laser damage analysis was performed via COMSOL Multiphysics to predict laser damage morphology, and validate the 3D surface profiler and scanning electron microscope results.

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