Partially amorphous stainless steel coatings: Microstructure, annealing behavior and statistical optimization of spray parameters

Zois, D.; Lekatou, A.; Vardavoulias, M.; Vaimakis, T.; Karantzalis, A. E.

doi:10.1016/j.surfcoat.2011.09.023

Cited by 19 publications

(6 citation statements)

References 65 publications

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“…As it can been seen in Figure 3 peaks of crystalline phases present on pattern diffraction of precursor powder disappear on the coating. These results agree with previous studies [26,27] on similar Fe-based alloy deposited by HVOF, which suggest that the spray process promotes the increase of glass content on the coating compared with the precursor powder due to fast quenching of molten particles through the action of flattening on to substrate. Compared with HVOF process, the arc spray process can be considered a potential technique for synthesis of amorphous-crystalline composite coating and promotes its application.…”

Section: Resultssupporting

confidence: 92%

Microstructural Characterization and Wear Properties of Fe-Based Amorphous-Crystalline Coating Deposited by Twin Wire Arc Spraying

Morquecho

Campa-Castilla

Leyva‐Porras

et al. 2014

Advances in Materials Science and Engineering

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Twin wire arc spraying (TWAS) was used to produce an amorphous crystalline Fe-based coating on AISI 1018 steel substrate using a commercial powder (140MXC) in order to improve microhardness and wear properties. The microstructures of coating were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) as well as the powder precursor. Analysis in the coating showed the formation of an amorphous matrix with boron and tungsten carbides randomly dispersed. At high amplifications were identified boron carbides at interface boron carbide/amorphous matrix by TEM. This kind of carbides growth can be attributed to partial crystallization by heterogeneous nucleation. These interfaces have not been reported in the literature by thermal spraying process. The measurements of average microhardness on amorphous matrix and boron carbides were 9.1 and 23.85 GPa, respectively. By contrast, the microhardness values of unmelted boron carbide in the amorphous phase were higher than in the substrate, approaching 2.14 GPa. The relative wear resistance of coating was 5.6 times that of substrate. These results indicate that the twin wire arc spraying is a promising technique to prepare amorphous crystalline coatings.

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Section: Resultssupporting

confidence: 92%

Microstructural Characterization and Wear Properties of Fe-Based Amorphous-Crystalline Coating Deposited by Twin Wire Arc Spraying

Morquecho

Campa-Castilla

Leyva‐Porras

et al. 2014

Advances in Materials Science and Engineering

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“…that a higher degree of melting would result in more molten material having filled the asperities and gaps of the previously deposited layers [85]. Moreover, in the case of fully melted particles, the in-pressure of the impacting melt induces mass flow; as a result, well flattened splats are produced by rapid cooling [86].…”

Section: Microstructure Of the Coatings As-sprayedmentioning

confidence: 99%

A comparative study on the microstructure and surface property evaluation of coatings produced from nanostructured and conventional WC–Co powders HVOF-sprayed on Al7075

Lekatou

Sioulas

Karantzalis

et al. 2015

Surface and Coatings Technology

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“…Nominal and measured compositions are reported in Table 1. The powder's morphology and composition were characterized by D. Zois et al [23,24], reporting a backscattered electron image of the particles [23] and microanalysis (energy dispersive spectroscopy elemental maps) of powder cross-sections [24]. It appears that the powder particles are mostly round-shaped, with a fraction of elongated particles, as typical of gas atomized feedstocks.…”

Section: Methodsmentioning

confidence: 99%

Amorphous Steel Coatings Deposited by Cold-Gas Spraying

Tuluí

Bartuli

Bezzon

et al. 2019

Metals

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Cold-gas spray (CGS) deposition of amorphous steel coatings starting from a commercial feedstock powder containing boron, tungsten, and silicon was investigated. Microstructural characterization, carried out by X-ray diffraction (XRD), transmission electron microscopy, and backscattered electron diffraction (EBSD) analysis, confirmed the amorphous nature of deposited coatings. The amorphization phenomenon is related to high-strain/strain-rate deformation with shear instability caused by very high particle kinetic energy, with a mechanism that resembles the severe plastic deformation process. The CGS coatings were heat-treated at temperatures ranging from 650 to 850 °C to induce partial recrystallization. The effect of nanocrystal nucleation and growth on the hardness of the coatings was investigated, and the hardness of heat-treated samples was found to increase with respect to as-sprayed coatings, outperforming conventional high-velocity oxy-fuel (HVOF) deposits. Hardness was found to decrease after prolonged (<90 min) or higher temperature (>750 °C) exposures.

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Partially amorphous stainless steel coatings: Microstructure, annealing behavior and statistical optimization of spray parameters

Cited by 19 publications

References 65 publications

Microstructural Characterization and Wear Properties of Fe-Based Amorphous-Crystalline Coating Deposited by Twin Wire Arc Spraying

Microstructural Characterization and Wear Properties of Fe-Based Amorphous-Crystalline Coating Deposited by Twin Wire Arc Spraying

A comparative study on the microstructure and surface property evaluation of coatings produced from nanostructured and conventional WC–Co powders HVOF-sprayed on Al7075

Amorphous Steel Coatings Deposited by Cold-Gas Spraying

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