Determination of the Local Thermal Conductivity of Functionally Graded Materials by a Laser Flash Method

Jan Jakub Zajas, Per Heiselberg

Research output: Contribution to journalJournal articleResearchpeer-review

13 Citations (Scopus)

Abstract

Determination of thermal conductivity of construction materials is essential to estimate their insulation capabilities. In most cases, homogenous materials are used and well developed methods exist for measurements of their thermal conductivity. The task becomes more challenging when dealing with non-homogenous materials, where the properties are changing over the volume. In the present study a test procedure is presented to address this problem. The measurement is based on a transient laser flash technique, which is used to determine the local transport properties of heterogeneous samples by scanning them point by point and determining the thermal conductivity as a function of the spatial dimensions. The method proves to be repeatable and of reasonable accuracy and can be used to determine the local thermal properties on a scale of millimeters. In this study, the method was successfully applied to create a map of thermal conductivity of a functionally graded material sample.
Original languageEnglish
JournalInternational Journal of Heat and Mass Transfer
Volume60
Issue numberMaj
Pages (from-to)542–548
Number of pages7
ISSN0017-9310
DOIs
Publication statusPublished - 2013

Fingerprint

Functionally graded materials
flash
Thermal conductivity
thermal conductivity
Lasers
lasers
insulation
Transport properties
Insulation
Thermodynamic properties
thermodynamic properties
transport properties
Scanning
scanning
estimates

Keywords

  • Laser flash method
  • Local thermal conductivity
  • Thermal diffusivity
  • Functionally graded materials

Cite this

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title = "Determination of the Local Thermal Conductivity of Functionally Graded Materials by a Laser Flash Method",
abstract = "Determination of thermal conductivity of construction materials is essential to estimate their insulation capabilities. In most cases, homogenous materials are used and well developed methods exist for measurements of their thermal conductivity. The task becomes more challenging when dealing with non-homogenous materials, where the properties are changing over the volume. In the present study a test procedure is presented to address this problem. The measurement is based on a transient laser flash technique, which is used to determine the local transport properties of heterogeneous samples by scanning them point by point and determining the thermal conductivity as a function of the spatial dimensions. The method proves to be repeatable and of reasonable accuracy and can be used to determine the local thermal properties on a scale of millimeters. In this study, the method was successfully applied to create a map of thermal conductivity of a functionally graded material sample.",
keywords = "Laser flash method, Local thermal conductivity, Thermal diffusivity, Functionally graded materials, Laser flash method, Local thermal conductivity, Thermal diffusivity, Functionally graded materials",
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Determination of the Local Thermal Conductivity of Functionally Graded Materials by a Laser Flash Method. / Zajas, Jan Jakub; Heiselberg, Per.

In: International Journal of Heat and Mass Transfer, Vol. 60, No. Maj, 2013, p. 542–548.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Determination of the Local Thermal Conductivity of Functionally Graded Materials by a Laser Flash Method

AU - Zajas, Jan Jakub

AU - Heiselberg, Per

PY - 2013

Y1 - 2013

N2 - Determination of thermal conductivity of construction materials is essential to estimate their insulation capabilities. In most cases, homogenous materials are used and well developed methods exist for measurements of their thermal conductivity. The task becomes more challenging when dealing with non-homogenous materials, where the properties are changing over the volume. In the present study a test procedure is presented to address this problem. The measurement is based on a transient laser flash technique, which is used to determine the local transport properties of heterogeneous samples by scanning them point by point and determining the thermal conductivity as a function of the spatial dimensions. The method proves to be repeatable and of reasonable accuracy and can be used to determine the local thermal properties on a scale of millimeters. In this study, the method was successfully applied to create a map of thermal conductivity of a functionally graded material sample.

AB - Determination of thermal conductivity of construction materials is essential to estimate their insulation capabilities. In most cases, homogenous materials are used and well developed methods exist for measurements of their thermal conductivity. The task becomes more challenging when dealing with non-homogenous materials, where the properties are changing over the volume. In the present study a test procedure is presented to address this problem. The measurement is based on a transient laser flash technique, which is used to determine the local transport properties of heterogeneous samples by scanning them point by point and determining the thermal conductivity as a function of the spatial dimensions. The method proves to be repeatable and of reasonable accuracy and can be used to determine the local thermal properties on a scale of millimeters. In this study, the method was successfully applied to create a map of thermal conductivity of a functionally graded material sample.

KW - Laser flash method

KW - Local thermal conductivity

KW - Thermal diffusivity

KW - Functionally graded materials

KW - Laser flash method

KW - Local thermal conductivity

KW - Thermal diffusivity

KW - Functionally graded materials

U2 - 10.1016/j.ijheatmasstransfer.2013.01.030

DO - 10.1016/j.ijheatmasstransfer.2013.01.030

M3 - Journal article

VL - 60

SP - 542

EP - 548

JO - International Journal of Heat and Mass Transfer

JF - International Journal of Heat and Mass Transfer

SN - 0017-9310

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