Application of high-temperature ceramic plasma-spray coatings for a reusable melting crucible

Kim, Kihwan; Kim, Jong Hwan; Hong, Kwon Pyo; Park, Jeong-Yong; Lee, Chan-Bock

doi:10.1016/j.surfcoat.2017.02.010

Cited by 19 publications

(5 citation statements)

References 22 publications

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“…Plasma spraying is a multifaceted process that can potentially be used to coat steel surfaces that suffer much deterioration due to their low intrinsic hardness. The densification of the coating material with an ability to produce thick coatings; a high flame temperature with a competent particle velocity; swiftness and flexibility of the coating process; and cost efficiency are some of the meritorious aspects of plasma spraying [1][2][3][4]. The main advantages of plasma spraying are the high deposition efficiency and desirable characteristics of the as-sprayed coatings.…”

Section: Introductionmentioning

confidence: 99%

Effect of Spraying Power on the Tribological Properties of Alumina and Alumina-Graphite Coatings

et al. 2023

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Atmospheric plasma spraying is used to deposit alumina and alumina-graphite composite coatings. The influence of arc current (plasma temperature) on the microstructure, roughness, elemental composition, and phase composition of the coatings is analyzed by scanning electron microscopy (SEM), surface roughness testing, energy dispersive X-ray spectroscopy (EDX), and X-ray diffraction (XRD). The tribological properties of the sprayed coatings are analyzed using a tribometer with a ball-on-flat configuration. The roughness of the as-sprayed coatings increases and the size of the granules decreases with the increase in plasma temperature. The results demonstrate that the friction coefficients and wear rates are slightly reduced for Al2O3 coatings sprayed at higher arc currents. The Al2O3-graphite coatings register lower friction coefficient values than the Al2O3 coatings under dry sliding conditions.

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Section: Introductionmentioning

confidence: 99%

Effect of Spraying Power on the Tribological Properties of Alumina and Alumina-Graphite Coatings

et al. 2023

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“…However, because of the high brittleness of ceramic, cracks and pores are likely to occur during the preparation process. In addition, an intermediate layer is prepared on substrate to decrease the large thermal stress in the interface (coating and substrate) [6][7][8]. Based on the above reasons, researchers add bonding phase in ceramic coating not only to improve the toughness of the coatings, but also to improve the corrosion resistance and mechanical property of the coatings [9].…”

Section: Introductionmentioning

confidence: 99%

The effect of immersion time on corrosion performance of the Al₂O₃-40TiO₂ and WC-10Co-4Cr coatings in 3.5 wt.% NaCl solution

Jiang¹,

Dai²,

Wei³

et al. 2022

Surf. Topogr.: Metrol. Prop.

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The Al2O3-40TiO2 and WC-10Co-4Cr coatings were fabricated by air plasma spraying (APS) and high velocity oxy-fuel (HVOF) spraying, respectively. The microstructure, corrosion resistance and eroded surface of the coatings were characterized. The effect of immersion time on corrosion behavior of the coatings in NaCl solution was investigated. Contrasting to the Al2O3-40TiO2 coating, the corrosion resistance of the WC-10Co-4Cr coating was still higher before 42 days of immersion. However, the corrosion resistance of the Al2O3-40TiO2 coating was higher than that of the WC-10Co-4Cr coating, when the immersion time reached 70 days. With the increase of immersion time, the galvanic corrosion accelerated the formation of pits and craters as well as decreased the corrosion resistance of the WC-10Co-4Cr coating. Meanwhile, corrosion products accumulated in the pits and promoted the stress cracking in the Al2O3-40TiO2 coating, which caused the fact that the corrosion resistance of the Al2O3-40TiO2 coating increased firstly and then decreased.

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“…Therefore, the plasticity of ceramic material is limited, and its ductility is far lower than that of metal. The instinctive brittleness of ceramic coatings is the main factor causing abrasive wear, which seriously inhibits the widely application of the ceramic coating in frictional parts [15,18,22]. Therefore, the study and evolution of self-lubricating ceramic coating with long service life is extremely important to solve the tribological and lubrication problems of mechanical parts under harsh working conditions.…”

Section: Introductionmentioning

confidence: 99%

“…However, ceramic materials are characterized by high brittleness, low fracture toughness and high elastic modulus due to the bond properties of ionic bond and covalent bond. Therefore, hard and brittle ceramic materials are di cult to be milled, planed or grinded, which limits the application of engineering structures [15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Investigation on the Tribological Behaviors of as-sprayed Al2O3 Coatings With the Effects of MoS2 Lubricant and External Loads

Deng

Tang

et al. 2020

Preprint

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The Al2O3-MoS2 ceramic-based lubricating coating was prepared via introducing MoS2 dry film lubricant into the pores and cracks of thermal-sprayed Al2O3 coating by facial paint spraying method. The microstructure, mechanical properties and tribological behaviors of the as-received Al2O3-MoS2 coating were thoroughly evaluated. The results illustrated that MoS2 was mainly concentrated on the shallow surface of the Al2O3 coating, and thus more uniform, more compact and smoother Al2O3-MoS2 coating was obtained. Meanwhile, the mechanical properties of the Al2O3 coating did not change significantly after the introduction of MoS2. The tribological experiments illustrated that compared with the Al2O3 coating, the friction coefficient and specific wear rate of the Al2O3-MoS2 coating under different loads were greatly reduced due to the generation of the lubricating layer. Especially under the load of 5 N, the friction coefficient was as low as 0.36, and the wear rate (1.49×10-5 mm3×(N×m)-1) was almost 17 times lower than that of Al2O3 coating (2.53×10-4 mm3×(N×m)-1). This research established a new and simple way to prepare ceramic-based self-lubricating coatings by using temperature-sensitive solid lubricants.

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Application of high-temperature ceramic plasma-spray coatings for a reusable melting crucible

Cited by 19 publications

References 22 publications

Effect of Spraying Power on the Tribological Properties of Alumina and Alumina-Graphite Coatings

Effect of Spraying Power on the Tribological Properties of Alumina and Alumina-Graphite Coatings

The effect of immersion time on corrosion performance of the Al₂O₃-40TiO₂ and WC-10Co-4Cr coatings in 3.5 wt.% NaCl solution

Investigation on the Tribological Behaviors of as-sprayed Al2O3 Coatings With the Effects of MoS2 Lubricant and External Loads

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Application of high-temperature ceramic plasma-spray coatings for a reusable melting crucible

Cited by 19 publications

References 22 publications

Effect of Spraying Power on the Tribological Properties of Alumina and Alumina-Graphite Coatings

Effect of Spraying Power on the Tribological Properties of Alumina and Alumina-Graphite Coatings

The effect of immersion time on corrosion performance of the Al2O3-40TiO2 and WC-10Co-4Cr coatings in 3.5 wt.% NaCl solution

Investigation on the Tribological Behaviors of as-sprayed Al2O3&nbsp;Coatings With the Effects of MoS2&nbsp;Lubricant and External Loads

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The effect of immersion time on corrosion performance of the Al₂O₃-40TiO₂ and WC-10Co-4Cr coatings in 3.5 wt.% NaCl solution

Investigation on the Tribological Behaviors of as-sprayed Al2O3 Coatings With the Effects of MoS2 Lubricant and External Loads