Thermally sprayed titanium suboxide coatings for piston ring/cylinder liners under mixed lubrication and dry-running conditions

Skopp, A.; Kelling, N.; Woydt, Mathias; Berger, Lutz‐Michael

doi:10.1016/j.wear.2006.11.012

Cited by 74 publications

(21 citation statements)

References 8 publications

(15 reference statements)

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“…The difference in the intensities of peaks corresponding to rutile planes (indicated in the top image) is due to the different surface qualities of samples. The absence of peaks of known sub-stoichiometric titanium oxides is due to the fact that an oxygen-deficient structure can be, besides sub-stoichiometric titanium oxides, also formed predominantly by vacancies [19,20] and crystallographic stacking faults [14]. In the HR-TEM micrograph (Fig.…”

Section: Resultsmentioning

confidence: 99%

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Structural and photocatalytic characteristics of TiO2 coatings produced by various thermal spray techniques

Ctibor¹,

Štengl²,

Pala³

2013

J Adv Ceram

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Titanium dioxide (TiO 2 ) was elaborated by four different thermal spray techniques-(i) plasma spraying using a water-stabilized torch, (ii) plasma spraying using a gas-stabilized torch, (iii) high velocity oxy-fuel gun, and (iv) oxy-acetylene flame. The porosity of the coatings was studied by optical microscopy, nano-structural features by scanning electron microscopy (SEM), phase composition by X-ray diffraction (XRD); the microhardness, surface roughness and wear resistance were evaluated. The diffuse reflectance was measured by ultra-violet/visible/near-infrared (UV/Vis/NIR) scanning spectrophotometer. The kinetics of photocatalytic degradation of gaseous acetone was measured under a UV lamp with 365 nm wavelength. After all the applied spray processes, the transformation of anatase phase from the initial powders to rutile phase in the coatings occurred. In spite of this transformation, all the coatings exhibited certain photocatalytic activity, which correlated well with their band gap energy calculated from reflectivity. All the coatings offer relatively good mechanical properties and can serve as robust photocatalysts.

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Section: Resultsmentioning

confidence: 99%

“…At both GSP and WSP spraying, titania is usually reduced and the coating has a lower content of oxygen compared to the starting powders [14]. In the case of our GSP spraying, a very low power level was selected as a means contributing to the oxygen loss.…”

Section: Powders and Sprayingmentioning

confidence: 99%

Structural and photocatalytic characteristics of TiO2 coatings produced by various thermal spray techniques

Ctibor¹,

Štengl²,

Pala³

2013

J Adv Ceram

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“…Firstly, the reducing atmosphere of the Ar-H 2 plasma jets is known to cause a partial reduction of oxide ceramics: the formation of Ti suboxides during the deposition of TiO 2 coatings or the partial reduction of Cr 2 O 3 (with the possible appearance of metallic Cr in the coatings) are well-documented examples. [20][21][22] Secondly, the very rapid quenching of lamellae upon impact with the substrate favours the retention of metastable phases in thermally sprayed coatings. [23][24][25][26] Based on known thermodynamic data BaFe 12 O 19 is the most stable compound at 727-1727 • C. 14,27 Above 1727 • C the Fe 3 O 4 and FeO are in equilibrium with compounds having Fe/Ba = 2, 1, 2/3 or 2/5.…”

Section: Methodsmentioning

confidence: 99%

Preparation of barium hexaferrite coatings using atmospheric plasma spraying

Lisjak

Bobzin

Richardt

et al. 2009

Journal of the European Ceramic Society

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“…Currently, DLC coating is being successfully applied to piston rings. Skopp et al [18] applied thermally sprayed titanium suboxide coatings to the piston ring and liner. The performance of this coating was tested under mixed lubrication and dry-running conditions.…”

Section: Surface Modificationmentioning

confidence: 99%

Design approach for optimization of a piston ring profile considering mixed lubrication

Zhang

Xie

2016

Friction

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Abstract:To reduce the friction of a piston ring while maintaining a large oil film load-carrying capacity, an approach comprising of the inverse method and the sequential quadratic programming algorithm was proposed. The approach considers the variation of mixed lubrication and variable lubricant viscosity with temperature along the engine stroke, is developed to optimize the profile of a piston ring. A piston ring profile is represented by a polynomial function. A case study of the second piston ring shows that the proposed method can be applied for the optimization of a piston ring profile. In addition, this paper illustrates the effects of the degree of a polynomial function. The results show that the minimization of friction and maximization of oil film load-carrying capacity can be balanced simultaneously when the degree of the polynomial is 2 and 5.

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Thermally sprayed titanium suboxide coatings for piston ring/cylinder liners under mixed lubrication and dry-running conditions

Cited by 74 publications

References 8 publications

Structural and photocatalytic characteristics of TiO2 coatings produced by various thermal spray techniques

Structural and photocatalytic characteristics of TiO2 coatings produced by various thermal spray techniques

Preparation of barium hexaferrite coatings using atmospheric plasma spraying

Design approach for optimization of a piston ring profile considering mixed lubrication

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