Preparation of plasma sprayed mullite coating on stainless steel substrate and investigation of its environmental dependence of friction and wear behavior

Li, Shuangjian; Xi, Xing; Hou, Guoliang; An, Yulong; Zhao, Xinqing; Zhou, Hang; Chen, Jianmin

doi:10.1016/j.triboint.2015.06.022

Cited by 25 publications

(4 citation statements)

References 35 publications

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“…The molten particles quickly hit the substrate and rapidly cool to form the amorphous phase. In addition, the metastable γ-Al2O3 phase in OC does not change to the stable α-Al2O3 owing to the high cooling rate [28]. The XRD pattern shows that NC (Figure 9b) is mainly composed of mullite, Ni, Ni3P, and AlNi3 phases.…”

Section: Microstructure and Phase Compositions Of The Coatingsmentioning

confidence: 99%

Electroless Ni–P Plating on Mullite Powders and Study of the Mechanical Properties of Its Plasma-Sprayed Coating

et al. 2021

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To effectively improve the properties of a mullite coating and its interfacial bonding with the substrate, a Ni–P layer is deposited on the surface of mullite powders by electroless plating. The original mullite powders and coated mullite powders are then deposited onto stainless-steel substrates by plasma spraying. The growth mechanism of the Ni–P layer during the plating, the microstructures of the coated powders and mullite coating and the properties of the mullite coatings are characterized and analyzed. The results indicate that the Ni–P layer on the surface of the mullite powder has cell structures with a dense uniform distribution and grows in layers on the surface of the mullite powder. The crystallization behavior of Ni-P amorphous layer is induced by heat treatment. Compared to the original mullite coating, the coating prepared by the coated mullite powders has better manufacturability, stronger adhesion to the substrate, lower porosity (7.40%, 65% of that of the original coating), higher hardness (500.1 HV, 1.2 times that of the original coating), and better thermal cycle resistance (two times that of the original coating). The method of preparation of high-temperature thermal barrier coatings with coated mullite powders has a high application value.

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Section: Microstructure and Phase Compositions Of The Coatingsmentioning

confidence: 99%

Electroless Ni–P Plating on Mullite Powders and Study of the Mechanical Properties of Its Plasma-Sprayed Coating

et al. 2021

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“…In fact, the sprayed particles were stacked and deposited in successively, resulting in incomplete overlaps along with cracks and pores in the Al while most ceramic particles were completely melted and spread in the form of a pancake. The defects in ceramic coating mainly came from incomplete in ltration between ceramic splats, cracks caused by stress change during rapid cooling and pores formed by air ow during spraying [33,34]. Besides, from the cross-section of Fig.…”

Section: Characterization Of Powders and Coatingsmentioning

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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“…The rapid cooling of molten droplets during the thermal spraying process invariably results in defects in the ceramic coatings [34][35][36]. The presence of these defects severely degrades the coating's mechanical properties, i.e., hardness, toughness, and bonding strength, thereby reducing wear resistance [37]. Researchers have proposed that impregnating organic or inorganic sealants into the defects of the thermally sprayed ceramic coatings may guarantee good toughening, densification, and wear resistance.…”

Section: Introduction mentioning

confidence: 99%

In-situ preparation of robust self-lubricating composite coating from thermally sprayed ceramic template

Wu¹,

Li²,

Fan³

et al. 2023

Journal of Advanced Ceramics

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The self-lubricating ceramic coatings that can control friction and wear have attracted researchers' widespread attention. However, the poor interfacial bonding between lubricants and ceramics and the deterioration of mechanical properties due to a tribological design limit their practical applications. Here, a robust self-lubricating coating was fabricated by an in-situ synthesis of MoS 2 /C within inherent defects of thermally sprayed yttria-stabilized zirconia (YSZ) coatings. The edge-pinning by noncoherent endows hybrid coatings with excellent interfacial strength, increasing their hardness (HV) and cohesive strength. Furthermore, owing to the formation of a well-covered robust lubricating film at a frictional interface, a coefficient of friction (COF) can be reduced by 79.6% to 0.15, and a specific wear rate (W) drops from 1.36×10 −3 to 6.27×10 −7 mm 3 •N −1 •m −1 . Combining outstanding mechanical properties and tribological performance, the hybrid coating exhibits great application potential in controlling friction and wear. Importantly, this strategy of introducing the target materials into the inherent defects of the raw materials to improve the relevant properties opens new avenues for the design and preparation of composite materials.

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Preparation of plasma sprayed mullite coating on stainless steel substrate and investigation of its environmental dependence of friction and wear behavior

Cited by 25 publications

References 35 publications

Electroless Ni–P Plating on Mullite Powders and Study of the Mechanical Properties of Its Plasma-Sprayed Coating

Electroless Ni–P Plating on Mullite Powders and Study of the Mechanical Properties of Its Plasma-Sprayed Coating

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

In-situ preparation of robust self-lubricating composite coating from thermally sprayed ceramic template

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Preparation of plasma sprayed mullite coating on stainless steel substrate and investigation of its environmental dependence of friction and wear behavior

Cited by 25 publications

References 35 publications

Electroless Ni–P Plating on Mullite Powders and Study of the Mechanical Properties of Its Plasma-Sprayed Coating

Electroless Ni–P Plating on Mullite Powders and Study of the Mechanical Properties of Its Plasma-Sprayed Coating

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

In-situ preparation of robust self-lubricating composite coating from thermally sprayed ceramic template

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