A novel test approach for plasma-sprayed coatings tested simultaneously under CMAS and thermal gradient cycling conditions

Steinke, T.; Sebold, Doris; Mack, Daniel Emil; Vaßen, Robert; Stöver, D.

doi:10.1016/j.surfcoat.2010.09.008

Cited by 77 publications

(35 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Jet engine thermal shock (JETS) tests 50 , 56 are often used to assess the performance of TBCs under thermal gradients and have been extended to CMAS testing (see the Va β en et al article in this issue). Burner rigs have also been modifi ed to enable the injection of CMAS precursor solutions through the fl ame 45 and are used successfully for testing plasma spray ZrYAlTiO x coatings. 58 In both cases, the temperatures in the front and back of the specimen are measured during the cycle and used to calculate the evolution of the strain energy.…”

Section: Assessing the Mitigation Strategymentioning

confidence: 99%

Environmental degradation of thermal-barrier coatings by molten deposits

et al. 2012

View full text Add to dashboard Cite

Molten deposits based on calcium-magnesium alumino-silicates (CMAS), originating from siliceous debris ingested with the intake air, represent a fundamental threat to progress in gas turbine technology by limiting the operating surface temperature of coated components. The thermomechanical and thermochemical aspects of the CMAS interactions with thermalbarrier coatings, as well as the current status of mitigating strategies, are discussed in this article. Key challenges and research needs for developing adequate solutions are highlighted.

show abstract

Section: Assessing the Mitigation Strategymentioning

confidence: 99%

Environmental degradation of thermal-barrier coatings by molten deposits

et al. 2012

View full text Add to dashboard Cite

show abstract

“…This analysis simulating the reality can be more reasonable because a significant increase of thermal resistance by applying TBCs was also observed by other researchers. 1,7,15) They also reported that the temperature of the metal can be reduced by a few hundred degrees, 1) by applying a TBC of 0.30.5 mm thickness to the hot side of the metal parts.…”

Section: Resultsmentioning

confidence: 98%

Assessment of the Thermal Conductivity of Yttria-Stabilized Zirconia Coating

2014

Mater. Trans.

View full text Add to dashboard Cite

The approach is based on an experimental set-up in which coated surface of the specimen was exposed to high temperature environment and inner metal surface was cooled by flowing air, simulating the actual gas turbine applications. The 8% yttria-stabilized zirconia coating was made by plasma spray method on a cylindrical specimen. This arrangement could be set-up in a laboratory. By measuring the overall thermal resistances of specimens, it has been shown that the thermal conductivity of the coating segment can be determined by the differences in thermal resistances of two specimens with and without coating. The objective of the present work is to extract the thermal conductivity of the thermal barrier coating under the condition that is nearly the same as the actual application. The effective thermal conductivities of coatings found to be 0.11 to 0.16 W/mK, while those measured by laser flash method in literature varied from 1 to 1.4 W/mK.

show abstract

“…The experiments to which the theoretical investigations refer comprised thermal cycling tests of disk-shaped thermal barrier coating samples using a burner rig facility [16]. The samples had a radius of 15 mm and consisted of a 3 mm thick substrate and a BC layer produced by the vacuum plasma spraying of Amdry 386 thermal spray powder (Sulzer Metco, Wohlen, Switzerland) with a particle size of d 50 = 24 μm (d 10 = 15 μm, d 90 = 36 μm).…”

Section: Methodsmentioning

confidence: 99%