Evaluation of the thermophysical properties of functionally graded materials at high temperatures by the photothermal radiometry

Akihiko Sano, Yuji Nagasaka

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Thermal barrier coatings and functionally graded materials (FGM) have been applied to a turbine blade exposed to high temperatures. Therefore, the evaluation of thermophysical properties of these coating materials is very important for designing turbine blade. We have adopted the photothermal radiometry (PTR) for the measurement of thermophysical properties of FGM at high temperatures. In this method, a layered sample is periodically heated by a modulated light source and periodic temperature variation is caused on the sample. The phase-lag between the modulated light source and the temperature variation on the sample contains information of thermal properties of the sample. We have measured the thermal diffusivity and thermal conductivity of round-robin FGM (single layer) at room temperature and compared the present results with other data obtained by the laser flash method. The average deviation of the other data from the present results was 14% both for thermal diffusivity and the thermal conductivity. We have measured the thermal diffusivity and thermal conductivity of FGM in the temperature range up to 1 273 K.

Original languageEnglish
Pages (from-to)1849-1855
Number of pages7
JournalNippon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B
Volume70
Issue number695
Publication statusPublished - 2004 Jul

Fingerprint

Radiometry
Functionally graded materials
thermophysical properties
Thermodynamic properties
thermal diffusivity
thermal conductivity
turbine blades
evaluation
Thermal diffusivity
Thermal conductivity
light sources
coatings
conductivity
Temperature
Turbomachine blades
Light sources
Turbines
temperature
flash
Thermal barrier coatings

Keywords

  • Funtionally Graded Materials
  • Non-destructive Evaluation
  • Photothermal Radiometry
  • Thermal Barrier Coatings
  • Thermal Conductivity
  • Thermal Diffusivity

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

@article{74d89ef9ccb24a5c905c2903682e9d90,
title = "Evaluation of the thermophysical properties of functionally graded materials at high temperatures by the photothermal radiometry",
abstract = "Thermal barrier coatings and functionally graded materials (FGM) have been applied to a turbine blade exposed to high temperatures. Therefore, the evaluation of thermophysical properties of these coating materials is very important for designing turbine blade. We have adopted the photothermal radiometry (PTR) for the measurement of thermophysical properties of FGM at high temperatures. In this method, a layered sample is periodically heated by a modulated light source and periodic temperature variation is caused on the sample. The phase-lag between the modulated light source and the temperature variation on the sample contains information of thermal properties of the sample. We have measured the thermal diffusivity and thermal conductivity of round-robin FGM (single layer) at room temperature and compared the present results with other data obtained by the laser flash method. The average deviation of the other data from the present results was 14{\%} both for thermal diffusivity and the thermal conductivity. We have measured the thermal diffusivity and thermal conductivity of FGM in the temperature range up to 1 273 K.",
keywords = "Funtionally Graded Materials, Non-destructive Evaluation, Photothermal Radiometry, Thermal Barrier Coatings, Thermal Conductivity, Thermal Diffusivity",
author = "Akihiko Sano and Yuji Nagasaka",
year = "2004",
month = "7",
language = "English",
volume = "70",
pages = "1849--1855",
journal = "Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B",
issn = "0387-5016",
publisher = "Japan Society of Mechanical Engineers",
number = "695",

}

TY - JOUR

T1 - Evaluation of the thermophysical properties of functionally graded materials at high temperatures by the photothermal radiometry

AU - Sano, Akihiko

AU - Nagasaka, Yuji

PY - 2004/7

Y1 - 2004/7

N2 - Thermal barrier coatings and functionally graded materials (FGM) have been applied to a turbine blade exposed to high temperatures. Therefore, the evaluation of thermophysical properties of these coating materials is very important for designing turbine blade. We have adopted the photothermal radiometry (PTR) for the measurement of thermophysical properties of FGM at high temperatures. In this method, a layered sample is periodically heated by a modulated light source and periodic temperature variation is caused on the sample. The phase-lag between the modulated light source and the temperature variation on the sample contains information of thermal properties of the sample. We have measured the thermal diffusivity and thermal conductivity of round-robin FGM (single layer) at room temperature and compared the present results with other data obtained by the laser flash method. The average deviation of the other data from the present results was 14% both for thermal diffusivity and the thermal conductivity. We have measured the thermal diffusivity and thermal conductivity of FGM in the temperature range up to 1 273 K.

AB - Thermal barrier coatings and functionally graded materials (FGM) have been applied to a turbine blade exposed to high temperatures. Therefore, the evaluation of thermophysical properties of these coating materials is very important for designing turbine blade. We have adopted the photothermal radiometry (PTR) for the measurement of thermophysical properties of FGM at high temperatures. In this method, a layered sample is periodically heated by a modulated light source and periodic temperature variation is caused on the sample. The phase-lag between the modulated light source and the temperature variation on the sample contains information of thermal properties of the sample. We have measured the thermal diffusivity and thermal conductivity of round-robin FGM (single layer) at room temperature and compared the present results with other data obtained by the laser flash method. The average deviation of the other data from the present results was 14% both for thermal diffusivity and the thermal conductivity. We have measured the thermal diffusivity and thermal conductivity of FGM in the temperature range up to 1 273 K.

KW - Funtionally Graded Materials

KW - Non-destructive Evaluation

KW - Photothermal Radiometry

KW - Thermal Barrier Coatings

KW - Thermal Conductivity

KW - Thermal Diffusivity

UR - http://www.scopus.com/inward/record.url?scp=5044245354&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=5044245354&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:5044245354

VL - 70

SP - 1849

EP - 1855

JO - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

JF - Nihon Kikai Gakkai Ronbunshu, B Hen/Transactions of the Japan Society of Mechanical Engineers, Part B

SN - 0387-5016

IS - 695

ER -