Ageing evaluation of thermal barrier coatings by thermal diffusivity

Bison, P.; Cernuschi, F.; Grinzato, E.; Маринетти, С.; Robba, D.

doi:10.1016/j.infrared.2006.06.019

Cited by 41 publications

(23 citation statements)

References 17 publications

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“…with the initial condition 0 T T = in the whole area occupied by the body (for 0 t = ) and the boundary conditions (see Fig.1 [11], [12], [13], expressed as …”

Section: Description Of the Problemmentioning

confidence: 99%

“…The most numerous group of currently investigated materials are the ones with uniform internal structure, with small spatial variation of material properties, for example metals, pure ceramics and plastics [11], [12], [13], [14]. Another separate group is represented by building porous materials with mostly non-homogenous structure, such as ceramic brick, aerated concrete (AAC) [15], cement and lime mortar, and concrete [2], [3], [10].…”

Section: Introductionmentioning

confidence: 99%

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Transient Infrared Measurement of Laser Absorption Properties of Porous Materials

Marynowicz¹

2016

Measurement Science Review

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The infrared thermography measurements of porous building materials have become more frequent in recent years. Many accompanying techniques for the thermal field generation have been developed, including one based on laser radiation. This work presents a simple optimization technique for estimation of the laser beam absorption for selected porous building materials, namely clinker brick and cement mortar. The transient temperature measurements were performed with the use of infrared camera during laser-induced heating-up of the samples' surfaces. As the results, the absorbed fractions of the incident laser beam together with its shape parameter are reported.

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“…with the initial condition 0 T T = in the whole area occupied by the body (for 0 t = ) and the boundary conditions (see Fig.1 [11], [12], [13], expressed as …”

Section: Description Of the Problemmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Transient Infrared Measurement of Laser Absorption Properties of Porous Materials

Marynowicz¹

2016

Measurement Science Review

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“…The quantities abs Q and ef R are treated in the similar way, like the ones in the formula describing a laser beam in the technological processes basing on laser treatment of materials [7]. In our case abs Q denotes the power of the absorbed (2) and (4) is justified by the fact of relatively small depth of the transitional zone, in which laser beam transfers into the heat energy.…”

Section: T T =mentioning

confidence: 99%

“…Volumetric heating is relatively easy to perform, however if we want to obtain certain temperature distribution at the sample surface, intended for the further image analysis, a much more complicated method must be applied. We can achieve this goal for example with the use of thin surface heaters [5], a thermal impulse with constant intensity [6], hot air, heating lamps [4] or laser beam [7]. From the practical point of view, the most desirable solution is the simplest one with an easiest accessibility.…”

Section: Introductionmentioning

confidence: 99%

Determination of thermal properties of porous building material by infrared thermography

Marynowicz¹

2016

Proceedings of the 2016 International Conference on Quantitative InfraRed Thermography

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The implementation of infrared thermography in measurement of the thermal conduction and the heat capacity of the typical porous building material were investigated. The prism-shaped 4x4x4cm sample was heated-up for 20 seconds by 660nm laser module and the surface temperature changes were recorded continuously by the IR camera. Thereafter, a simple inverse method was applied to determine the researched problem unknowns with the usage of proposed approach. The objective thermal properties, i.e. thermal conductivity and heat capacity, of the clinker brick were estimated. The results were compared with reference measurements performed with Netzsch LFA-427 and DSC-404 equipments.

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“…The model provides a ratio between the in-plane and the in-depth thermal diffusivity (conductivity) approximately of 2:1. To experimentally verify what the model forecasts, the thermal diffusivity of a sample of TBC deposited with the APS technique is measured using pulsed thermography [9].…”

Section: Introductionmentioning

confidence: 99%

Evaluation of thermal conduction anisotropy on Thermal Barrier Coating

Bison¹,

Cernuschi²

2008

Proceedings of the 2008 International Conference on Quantitative InfraRed Thermography

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The microstructural analysis of Thermal Barrier Coatings, deposited according to the Air Plasma Spray technology, furnishes information according which a strong orthotropic thermal conductivity is expected to be measured for such a material. Pulsed experiment with a localized heating source and thermographic temperature recording, permit to evaluate both the in-depth and in-plane components of the conductivity tensor. The utilization of a gaussian shaped heating function permits to compare both the direct solution and the one obtained by a spatial Fourier Transform.

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Ageing evaluation of thermal barrier coatings by thermal diffusivity

Cited by 41 publications

References 17 publications

Transient Infrared Measurement of Laser Absorption Properties of Porous Materials

Transient Infrared Measurement of Laser Absorption Properties of Porous Materials

Determination of thermal properties of porous building material by infrared thermography

Evaluation of thermal conduction anisotropy on Thermal Barrier Coating

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