Characterization of Thermal Spray Coatings

Schorr, Brian; Stein, Kevin J; Marder, A. R.

doi:10.1016/s1044-5803(98)00048-5

Cited by 31 publications

(20 citation statements)

References 1 publication

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“…4b and c. In boat coatings, elongated splats of molten powder form a curved lamellar structure, with oxide layers in between, which is typical for spray coatings [24][25][26][27]. No cracking was found in the coatings and no peeling was observed at the interface between the coating and the substrate.…”

Section: Microstructuresmentioning

confidence: 99%

Possibility of the Abrasive Wear Resistance Determination with Scratch Tester

et al. 2009

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Abrasion wear resistance is very important in many applications and it is not a surprise that there are many laboratory test methods for its determination. In this article, a possibility of the abrasive wear resistance determination with scratch tester, as a relatively easy and quick test method, was analysed and compared with the standard test method for pin abrasion testing (ASTM G 132). Materials used in the tests were: two ferrous-based coatings (deposited on an Al-Si alloy substrate with atmospheric plasma spraying), two aluminium-based composite materials with 10 wt% of Al 2 O 3 reinforcements (produced with compocasting technique) and grey cast iron, known as a material with good abrasive wear resistance. Coefficient of friction and wear of the samples were investigated with both abrasion wear test methods and analysed in correlation with their mechanical properties.

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Section: Microstructuresmentioning

confidence: 99%

Possibility of the Abrasive Wear Resistance Determination with Scratch Tester

et al. 2009

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“…A specific laser tool adapted (in terms of wavelength, pulse duration, spot size, and pulse frequency) to the material to be treated, combined with a scanner for three-dimensional shape modification, could promote mechanical and physicochemical bond strength for thick coatings elaborated by thermal spraying. Laser processing parameters have been shown to influence not only the surface topography but also the microstructure of the material due to the heat flux absorbed during such treatment (Ref 14,15). The interaction between the laser and material is typically described by considering three main factors: the laser light, the material, and the environment.…”

Section: Introductionmentioning

confidence: 99%

Laser Patterning Pretreatment before Thermal Spraying: A Technique to Adapt and Control the Surface Topography to Thermomechanical Loading and Materials

et al. 2015

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Coating characteristics are highly dependent on substrate preparation and spray parameters. Hence, the surface must be adapted mechanically and physicochemically to favor coating--substrate adhesion. Conventional surface preparation methods such as grit blasting are limited by surface embrittlement and produce large plastic deformations throughout the surface, resulting in compressive stress and potential cracks. Among all such methods, laser patterning is suitable to prepare the surface of sensitive materials. No embedded grit particles can be observed, and high-quality coatings are obtained. Finally, laser surface patterning adapts the impacted surface, creating large anchoring area. Optimized surface topographies can then be elaborated according to the material as well as the application. The objective of this study is to compare the adhesive bond strength between two surface preparation methods, namely grit blasting and laser surface patterning, for two material couples used in aerospace applications: 2017 aluminum alloy and AISI 304L stainless steel coated with NiAl and YSZ, respectively. Laser patterning significantly increases adherence values for similar contact area due to mixed-mode (cohesive and adhesive) failure. The coating is locked in the pattern.

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“…Por otro lado, se encontró que el módulo de elasticidad presenta un comportamiento monomodal con un valor de 64,03 ± 8,69 GPa (Figura 6c), el que es inferior al valor de módulo de elasticidad reportado en la literatura [17,30,31] para recubrimientos de YSZ elaborados por SPS. Este comportamiento puede deberse a que la ZF no está completamente fundida como se esperaba y esta disminución en su grado de fusión pudo atribuirse al corto tiempo de residencia de las partículas nanométricas en el plasma generando un recubrimiento con gran cantidad de zonas con partículas nanométricas semifundidas.…”

Section: Caracterización Mecánica Del Recubrimiento Por Nanoindentaciónunclassified

Microestructura y propiedades mecánicas por microindentación y nanoindentación de un recubrimiento de circona estabilizada con itria (4,5% en mol) elaborado por plasma atmosférico a partir de suspensiones

González

Hurtado

López³

2017

Ingeniare. Rev. chil. ing.

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Microestructura y propiedades mecánicas por microindentación y nanoindentación de un recubrimiento de circona estabilizada con itria (4,5% en mol) elaborado por plasma atmosférico a partir de suspensiones RESUMENEn este trabajo se analizó la relación entre la microestructura de un recubrimiento de 4,5% en mol de circona estabilizada con itria (4.5YSZ) con sus propiedades mecánicas medidas por nanoindentación y microindentación. Los recubrimientos fueron elaborados por la técnica de proyección térmica por plasma atmosférico a partir de una suspensión de etanol y dos tipos de polvos (3 y 8% en mol de YSZ) con partículas de tamaño nanométrico. El análisis de la microestructura de la sección trasversal del recubrimiento de 4.5YSZ reveló una estructura bimodal, la que estaba compuesta de una zona con partículas semifundidas (ZS) y otra zona compuesta de lamelas con un alto grado de fusión (ZF). Los ensayos de nanoindentación mostraron una distribución Weibull bimodal para la dureza y monomodal para el módulo de elasticidad, lo que está relacionada con su estructura. Los ensayos microindentación (microdureza Vickers y módulo de elasticidad: E) presentaron una distribución Weibull monomodal. Estos resultados de microindentación estuvieron influenciados por el área de contacto de las zonas indentadas, ya que estas tomaban las dos zonas microestructurales (ZF y ZS) del recubrimiento de 4.5YSZ revelando una medición global de sus propiedades mecánicas.Palabras clave: Proyección térmica por plasma, suspensiones de nanopartículas, recubrimiento de circona, nanoindentación, microindentación. ABSTRACTIn this paper the microstructure of 4.5 mol%

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Characterization of Thermal Spray Coatings

Cited by 31 publications

References 1 publication

Possibility of the Abrasive Wear Resistance Determination with Scratch Tester

Possibility of the Abrasive Wear Resistance Determination with Scratch Tester

Laser Patterning Pretreatment before Thermal Spraying: A Technique to Adapt and Control the Surface Topography to Thermomechanical Loading and Materials

Microestructura y propiedades mecánicas por microindentación y nanoindentación de un recubrimiento de circona estabilizada con itria (4,5% en mol) elaborado por plasma atmosférico a partir de suspensiones

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