Invited Article: Micron resolution spatially resolved measurement of heat capacity using dual-frequency time-domain thermoreflectance

Invited Article: Micron resolution spatially resolved measurement of heat capacity using dual-frequency time-domain thermoreflectance

A pump-probe photothermal technique – dual-frequency time-domain thermoreflectance – was developed for measuring heat capacity with a spatial resolution on the order of 10 μm. The method was validated by measuring several common materials with known heat capacity. Rapid measurement of composition-ph...

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Veröffentlicht in:Review of scientific instruments 2013-07, Vol.84 (7), p.071301-071301
Hauptverfasser: Wei, Changdong, Zheng, Xuan, Cahill, David G., Zhao, Ji-Cheng
Format: Artikel
Sprache:eng
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Austenitic stainless steels
Computer simulation
Diffusion
Heat capacity
Mathematical models
Phase transformations
Specific heat
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container_end_page 071301
container_issue 7
container_start_page 071301
container_title Review of scientific instruments
container_volume 84
creator Wei, Changdong
Zheng, Xuan
Cahill, David G.
Zhao, Ji-Cheng
description A pump-probe photothermal technique – dual-frequency time-domain thermoreflectance – was developed for measuring heat capacity with a spatial resolution on the order of 10 μm. The method was validated by measuring several common materials with known heat capacity. Rapid measurement of composition-phase-property relationships was demonstrated on Ti-TiSi2 and Ni-Zr diffusion couples; experimental values of heat capacity of the intermetallic compounds in these diffusion couples were compared with literature values and CALPHAD (CALculation of PHAse Diagram) calculations. The combination of this method and diffusion multiples provides an efficient way to generate thermodynamic data for CALPHAD modeling and database construction. The limitation of this method in measuring low thermal diffusivity materials is also discussed.
doi_str_mv 10.1063/1.4815867
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source AIP Journals Complete; AIP Digital Archive; Alma/SFX Local Collection
subjects Austenitic stainless steels
Computer simulation
Diffusion
Heat capacity
Mathematical models
Phase transformations
Specific heat
title Invited Article: Micron resolution spatially resolved measurement of heat capacity using dual-frequency time-domain thermoreflectance
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