Fracture Toughness of Plasma Spreaged YSZ coatings

Sonoya, Keiji; Li, Chang-Jiu; Wang, Wei Ze

doi:10.2207/qjjws.24.65

Cited by 7 publications

(6 citation statements)

References 5 publications

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“…The sprayed coating has a laminated structure of particles where the interparticle binding area increases with increasing coating thickness, leading to an increase in the strength of the coating in the thickness direction. (Sonoya,K. et al,2006) Therefore, the adhesion strength of the specimen having a 100-μm-thick top coating was lower than that of a specimen having a 300-μm-thick top coating, as exemplified by the delamination at the center of the bond coating at the interface between the base metal and the bond coating in the specimen having a 100-μm-thick top coating observed after the tensile pin test (Fig.…”

Section: Effect Of Thickness Of Sprayed Coating On Adhesion Strengthmentioning

confidence: 93%

Assessment of the properties of sprayed coatings for the thermal barrier applied to the piston of internal-combustion engine

Sonoya

Sekine

Nakamura

2015

Mechanical Engineering Journal

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Section: Effect Of Thickness Of Sprayed Coating On Adhesion Strengthmentioning

confidence: 93%

Assessment of the properties of sprayed coatings for the thermal barrier applied to the piston of internal-combustion engine

Sonoya

Sekine

Nakamura

2015

Mechanical Engineering Journal

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“…The crack-shape after the interference is uncertain though the interference pattern can be judged from Eqs. (3) to (5). Because the crack propagation changes by the material, the crack-shape after the interference is easily estimated to have various shapes based on the material.…”

Section: Proposal Of Crack-shape Correction Methods When Interference mentioning

confidence: 99%

“…It is well known (5) that the fracture toughness value of a ceramic spray coating depends on the binding rate between the melted particles. It is speculated that the binding rate between particles can be evaluated by the existence rate of the pore; that is, an unconnecting part.…”

Section: Proposed Interference-judgment Condition Of Crack and Crack-mentioning

confidence: 99%

“…It is necessary to obtain the stable crack propagation lengths, ∆c 0 and ∆c 1 , in order to use the interference-judgment condition of Eqs. 3to (5). This section will then show the method to obtain the ∆c 0 value and the ∆c 1 value by using an R-curve.…”

Section: Stable Crack Propagation Length and Interference-judgment Comentioning

confidence: 99%

“…However, there are few studies concerned with the fracture of a single layer spray coating. Moreover, although there is a study (5) that discussed the fracture toughness value of a spray coating, its result was based on an evaluation from the one adhered to a base material.…”

Section: Introductionmentioning

confidence: 99%

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Strength Evaluation of Alumina Spray Coating (2nd Report, Proposal for Judgment of Crack Interference and Correction Methods of Crack- Shape)

Aramaki

Hamada

Miyaji

et al. 2011

JMMP

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The alumina spray coating is a material containing many pores (cracks) and there is a crack-interference in the alumina spray coating, therefore, the crack-interference leads to a decrease in the fracture strength. There are some studies that have used the elastic analysis for two or more cracks. Moreover, there are some standards for the combining of the cracks. However, in ceramics including alumina, a study of quantifying the internal spread of the crack when interfering and presuming a static fracture strength with judgment of the crack-interference after the stable crack propagation is not known. In this study, after the alumina spray coating single layer was taken out, a Vickers' indentation crack was introduced, a 4-point bending test was performed and a R-curve was acquired. As a result, the fracture strength characteristic of the alumina spray coating single layer was clarified. Three judgments of the crack-interference with the R-curve were then proposed. Moreover, a correction method of the crack-shape when the cracks interfere was proposed. The validities of the proposals were verified with bending tests after two Vickers' indentation cracks were introduced.

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Corrosion resistance and thermal-mechanical properties of ceramic pellets to molten calcium-magnesium-alumina-silicate (CMAS)

Fang

Wang

Huang

et al. 2019

Ceramics International

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Fracture Toughness of Plasma Spreaged YSZ coatings

Cited by 7 publications

References 5 publications

Assessment of the properties of sprayed coatings for the thermal barrier applied to the piston of internal-combustion engine

Assessment of the properties of sprayed coatings for the thermal barrier applied to the piston of internal-combustion engine

Strength Evaluation of Alumina Spray Coating (2nd Report, Proposal for Judgment of Crack Interference and Correction Methods of Crack- Shape)

Corrosion resistance and thermal-mechanical properties of ceramic pellets to molten calcium-magnesium-alumina-silicate (CMAS)

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