Evidence of Substrate Melting of NiCr Particles on Stainless Steel Substrate by Experimental Observation and Simulations

Tran, Anh Phuong; Brossard, S.; Hyland, Margaret; James, Bryony; Munroe, Paul

doi:10.1007/s11090-009-9192-0

Cited by 31 publications

(15 citation statements)

References 47 publications

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“…The EDS linescan (Fig. 6g) performed across the splatsubstrate interface confirms the absence of any mixing or diffusion between the aluminum and NiCr (5). On the other hand it shows a slightly higher concentration of Mg at the surface of the substrate (6).…”

Section: Aluminum Specimenmentioning

confidence: 66%

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Study of the Splat-Substrate Interface for a NiCr Coating Plasma Sprayed onto Polished Aluminum and Stainless Steel Substrates

et al. 2009

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In the plasma spraying process, the mechanisms by which molten particles impact on and bond with the substrate are not fully understood. For this study a nickel-chromium powder was sprayed onto mirror polished aluminum 5052 and stainless steel 304 substrates to form single splats. The splats and their interface with the substrate were studied using detailed microstructural characterization with emphasis on the shape of the splats, the nature of the splat-substrate interface, including the degree of contact and the extent of melting of the substrate and mixing with the splat material, and the presence, either on or within the splats of phases such as oxides. It was shown that melting of the substrate, along with intermixing and diffusion between substrate and splat materials, occurred for the steel substrate, but not for the aluminum substrate. Oxides including nickel oxide, chromium oxide, and aluminum oxide were also observed, the type and distribution of these phases depended on the substrate type.

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Section: Aluminum Specimenmentioning

confidence: 66%

“…EDS linescans across this zone (Fig. 3d) also shows that Fe and Ni interdiffusion across the splat-substrate interface has occurred (5). In contrast, the linescan made across a zone where the splat-substrate interface is clear (Fig.…”

Section: Stainless Steel Specimenmentioning

confidence: 89%

Study of the Splat-Substrate Interface for a NiCr Coating Plasma Sprayed onto Polished Aluminum and Stainless Steel Substrates

et al. 2009

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“…There are so many relating factors in the splat formation process which has been extensively investigated by theoretical 4,5) , numerical 6,7) and experimental methods 8,9) . However, it is still not yet fully understood the influence of ambient pressure on the splat formation process.…”

Section: Introductionmentioning

confidence: 99%

Role of Ambient Pressure on Splat Formation and Coating Adhesion Strength during Thermal Spraying Process

Yang

Tanaka

Usami

et al. 2011

QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY

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Cu powders were thermally sprayed onto AISI304 substrate surface under various ambient pressures, the splat shape on the substrate had a transitional changing tendency from a splash splat to a disk one with decreasing the ambient pressure. Millimeter-sized molten Cu droplets were deposited on AISI304 substrate surface by free-falling experiment, the heat transfer from splat to substrate was enhanced with the decrease of ambient pressure, which can be attributed to the good contact at splat-substrate interface. The shear adhesion strength of coating fabricated on blasted AISI304 substrate corresponded quite well to that of the splat shape. Therefore, control of thermal spray process through observation on individual splat behavior is meaningful.

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“…As reported up to now, effect of dominating process factors on the flattening behavior of an individual splat onto flat substrate surface has been systematically investigated through theoretical (4), (5) , numerical (6)- (8) and experimental methods (9)- (11) in the last few decades.…”

Section: Introductionmentioning

confidence: 99%

Splat Formation Mechanism in Thermal Spraying

Fukumoto

Yang

Yamada

et al. 2011

JMMP

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In order to understand the splat formation process of individual splat deposited by thermal spraying, commercially available Nickel powders with diameter of several tens micrometers were thermally sprayed onto mirror polished AISI304 substrate surface. The deposited splat shows transition phenomenon from splash type to disk one in flattening on collision onto substrate surface according to both substrate temperature and ambient pressure change. That is, transition temperature, Tt and transition pressure, Pt can be defined as critical values for the transitions. The three-dimensional map was set up to control the thermal spraying process. The observation on the bottom surface morphology on single splat indicates that the initial solidification may induce the splashing occurrence. Moreover, as the simulation of the real thermal spraying process, free falling experiment was conducted in this study. The thermal history of the free falling Cu droplet onto AISI304 substrate was investigated, indicating the flattening pattern is decided just after collision onto solid surface, which is enough earlier to finalization of the flattening.

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Evidence of Substrate Melting of NiCr Particles on Stainless Steel Substrate by Experimental Observation and Simulations

Cited by 31 publications

References 47 publications

Study of the Splat-Substrate Interface for a NiCr Coating Plasma Sprayed onto Polished Aluminum and Stainless Steel Substrates

Study of the Splat-Substrate Interface for a NiCr Coating Plasma Sprayed onto Polished Aluminum and Stainless Steel Substrates

Role of Ambient Pressure on Splat Formation and Coating Adhesion Strength during Thermal Spraying Process

Splat Formation Mechanism in Thermal Spraying

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