Investigating the Wear Behavior of Fe-Based Amorphous Coatings under Nanoscratch Tests

Wu, Yixuan; Luo, Qiang; Jiao, Jin; Wei, Xianshun; Shen, Jun

doi:10.3390/met7040118

Cited by 15 publications

(6 citation statements)

References 31 publications

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“…Wear resistances of all the coating samples were also examined at ambient (23 • C) and an elevated temperature of 200 • C. The unreinforced steel coating with the highest hardness (Figure 8 and Table 5) had the higher wear resistance, i.e., lower wear rate (0.13 mm 3 /h at 23 • C and 0.03 mm 3 /h at 200 • C). Such direct dependence of wear rate on hardness closely matched the typical behavior observed for other thermally sprayed coatings [20,[43][44][45]. Thus, the hardness was considered as one of the main factors that affected the wear rate along with the hardness/elastic modulus ratio and residual stress [20].…”

Section: Discussionsupporting

confidence: 75%

Microstructural and Tribological Characteristics of Composites Obtained by Detonation Spraying of Iron-Based Alloy—Carbide Powder Mixtures

Azarmi,

Tangpong

2023

Materials

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iron-based coatings have exhibited good mechanical properties, such as high hardness and good wear resistance, which are desirable properties in applications such as automobile brake rotors. iron-based coatings are also good replacements for Co- and Ni-based coatings, which are costly and could have health and environmental concerns due to their toxicity. In this research, three different iron-based coatings were deposited using the Detonation Gun Spraying (DGS) technology onto aluminum substrates, including the steel powders alone (unreinforced), and steel powders mixed with Fe3C and SiC particles, respectively. The microstructural characteristics of these coatings and mechanical properties, such as hardness and wear resistance, were examined. 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. While it was expected that steel particles reinforced with hard ceramic particles would result in increased hardness, instead, the unreinforced steel coating had the highest hardness, possibly due to a higher degree of amorphization in the coating than the other two. The microstructural observation confirmed the formation of dense coatings with good adhesion between layers. All samples were subjected to ball-on-disk wear tests at room temperature (23 °C) and at 200 °C. Similar wear resistances of the three samples were obtained at room temperature. At 200 °C, however, both ceramic reinforced composite samples exhibited higher wear rates in line with the reduction in their hardness values. This work explains, from the microstructural point of view, why adding hard particles to steel powers may not always lead to coatings with higher hardness and better wear resistance.

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Section: Discussionsupporting

confidence: 75%

Microstructural and Tribological Characteristics of Composites Obtained by Detonation Spraying of Iron-Based Alloy—Carbide Powder Mixtures

Azarmi,

Tangpong

2023

Materials

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“…The catalytic activity of electrodes is also strongly influenced by their crystal structure, especially, nanocrystalline or amorphous states have been reported as the most attractive towards HER [35]. Furthermore, amorphous alloys are known to exhibit higher hardness, better tribological properties [55] and also a better corrosion behavior compared to those of crystalline ones [56]. The X-ray diffraction (XRD) spectra of the deposits are given in Fig.…”

Section: Samplementioning

confidence: 99%

Electrodeposited tungsten-rich Ni-W, Co-W and Fe-W cathodes for efficient hydrogen evolution in alkaline medium

Vernickaite

Цынцару

Sobczak

et al. 2019

Electrochimica Acta

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The search of active, stable and cost-effective non-noble electrocatalysts for hydrogen evolution reaction (HER) is essential for sustainable energy systems. In this study, the electrodeposited Ni-W, CoW and FeW coatings having 5e30 at.% of W were examined as an alternative electrocatalysts for hydrogen evolution. The electrocatalytic efficiency of the electrodes was investigated on the basis of electrochemical data obtained from steady-state polarization technique in 30 wt% NaOH solution. It was found that with increasing of tungsten content in the deposits up to ~30 at.% a crystal-to-ultra-nanocrystalline transition takes place and the crystal grain size decreases up to 2e4 nm. The high content of W leads to course-grained coatings. These morphological and structural changes showed remarkable impact on the catalytic activity. The maximum catalytic performance was obtained for ultra-nanocrystalline W coatings. Among them the Ni-29at.%W demonstrated the highest apparent exchange current density (ECD) at the room temperature, i.e. 0.55 mA cm À2 , thus indicating more favorable hydrogen reduction. A significant improvement of catalytic activity of all tested cathodes with increasing the temperature of NaOH solution was noticed. Among investigated Co-33at.%W, Fe-30at.%W and Ni-29at.%W cathodes, the last one showed the best performance towards HER (ECD ¼ 14.5 mA cm À2 at 65 C).

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“…The XRD analysis of the coating revealed that a large amount of amorphous phase was formed during the DGS deposition process. However, there was no report of observing distinguished peaks from crystalline phases [27][28]. Despite SiC and FeCrMo phases, some peaks from FeC were also detected in the XRD pattern of St-SiC coating.…”

Section: Materials and Experimental Proceduresmentioning

confidence: 94%

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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Investigating the Wear Behavior of Fe-Based Amorphous Coatings under Nanoscratch Tests

Cited by 15 publications

References 31 publications

Microstructural and Tribological Characteristics of Composites Obtained by Detonation Spraying of Iron-Based Alloy—Carbide Powder Mixtures

Microstructural and Tribological Characteristics of Composites Obtained by Detonation Spraying of Iron-Based Alloy—Carbide Powder Mixtures

Electrodeposited tungsten-rich Ni-W, Co-W and Fe-W cathodes for efficient hydrogen evolution in alkaline medium

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

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