Wear-Resistant Amorphous Iron-Based Flame-Sprayed Coatings

Voyer, Joël

doi:10.1007/s11666-010-9495-y

Cited by 30 publications

(10 citation statements)

References 11 publications

(2 reference statements)

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“…610) Ghafouri-Azar et al 6) predicted the spreading characteristics of a molten metal droplet by using an experimental droplet impact and solidification model. According to an experimental investigation by Voyer,7) the hardness of the flame spray coating was similar to that of other high-quality coatings obtained by alternative thermal spray processes. El-Hadj et al 8) showed that the solidification of the splat and the adhesion with the substrate were affected by the gas temperature in the vicinity of the substrate.…”

Section: Introductionsupporting

confidence: 54%

Effects of Curvature on the Flow Characteristics and Particle Behavior in the Flame Spray Process

et al. 2015

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The present study investigates numerically the thermal and flow characteristics and transient particle behavior in the conventional flame spray process by using the computational fluid dynamics (CFD) code (ANSYS Fluent V. 16.1). From geometrical consideration, it is noted that the deposition angle of a particle decreases drastically on a curved surface because of the curvature effect, and significantly affects the normal impact velocity of the particle. Numerical results indicated that the normal component of the particle impact velocity on the curved surface was lower than that on a flat surface by up to 5.7%. This result is significant with regard to the adhesive characteristics, as binding energy with the substrate is proportional to the square of the particle's normal impact velocity. The influence of spray distances and radius of the curved substrate were examined and the corresponding results would be useful in finding optimal operating conditions for the curved substrate. It was observed in this study that the spray distance exhibited a more dominant effect on the particle impact velocity, substantially associated with the coating quality of the deposited layer.

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Section: Introductionsupporting

confidence: 54%

Effects of Curvature on the Flow Characteristics and Particle Behavior in the Flame Spray Process

et al. 2015

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“…It will be important in a future study to investigate the degree of amorphization in the coating samples produced in this study. Generally, the porosity has the strongest effect on the hardness of the coatings [8,24]. Thus, it is expected that an increase in porosity level consequently may result in an almost linear decrease of hardness regardless of the deposition process [8,33].…”

Section: Discussionmentioning

confidence: 99%

“…Steel composites can be deposited on a variety of metallic surfaces to improve their mechanical strength. Aluminum and aluminum alloys possess high specific strength and low weight [24]; meanwhile, they have exhibited poor sliding properties and low wear resistance [25]. Thus, it is worthwhile to find a solution for these shortcomings of aluminum-based engineering parts and components.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Microstructural Characteristics and Mechanical Properties of Thermally Sprayed Fe-Base Composites Reinforced with Different Ceramic Particulates

Azarmi

Tangpong

2021

Thermal Spray 2021: Proceedings From the International Thermal Spray Conference

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Three different coatings were deposited using the Detonation Gun Spraying (DGS) technology from steel powders alone; and steel powers mixed with Fe3C and SiC particles; respectively. The microstructural characteristics of these coatings were examined and the hardness of each type of coating was studied. The morphology and structure of the feedstock powders were affected by the exposure to high temperature during the spraying process and rapid solidification of steel powders that resulted in the formation of an amorphous structure. The unreinforced steel coating had the highest hardness among the three types of coatings; possibly due to a higher degree of amorphization in the coating compared to the other two samples. The microstructural observation confirmed the formation of dense coatings with a layered structure with good connectivity between layers with minimum defects and porosities in the interfacial regions.

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“…In addition, Voyer [1] and Zhou et al [2] showed that suitable characteristics promoted such coatings to be used in rotational shafts instead of heat treatment processes previously used in industry. Moreover, Xu [3] proposed that suitable coatings can replace traditional surface treatment processes and save cost during machining.…”

Section: Introductionmentioning

confidence: 99%

Cutting force models for Fe–Al-based coating processed by a compound NC machine tool

Sun

Zhang

Zhang³

et al. 2015

Int J Adv Manuf Technol

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The arc-spraying Fe-Al-based coating cutting process is a spindle-tool-workpiece vibration system dependent upon the machine tool's dynamic performance, cutting tool vibration, the coarse coating surface and its thin cutting depth. To investigate the cutting force, this research indicates the coating cutting fundamental mechanics; furthermore, it represents two cutting steps and cutting force models in the machining process avoiding an analysis of the natural vibration parameters of the machine tool itself. In the first cutting step, there is a transient cutting force due to forced vibration of the rough surface; the second cutting step has a steady machining feature based on the first cutting surface and the reduced hardness of the inhomogeneous region. According to the different characteristics of each cutting step, this research presents dynamic cutting calculation models including cutting parameters, tool vibration and cutting depth effects in the first cutting step. A steady cutting model is based on three cutting parameters including cutting velocity, cutting feed and cutting depth. Piezoelectric force and acceleration sensors were used to obtain accurate experimental data. Then, response surface methodology (RSM) and the principle of least squares estimation of polynomial regression (PLSEPR) were applied to analyse the resultant cutting data. The results showed that cutting force calculation models were suitable for the coating machining.

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Wear-Resistant Amorphous Iron-Based Flame-Sprayed Coatings

Cited by 30 publications

References 11 publications

Effects of Curvature on the Flow Characteristics and Particle Behavior in the Flame Spray Process

Effects of Curvature on the Flow Characteristics and Particle Behavior in the Flame Spray Process

Investigation on Microstructural Characteristics and Mechanical Properties of Thermally Sprayed Fe-Base Composites Reinforced with Different Ceramic Particulates

Cutting force models for Fe–Al-based coating processed by a compound NC machine tool

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