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Abstract:

We present a technique that retrieves the thermal diffusivity of metallic samples in a two-dimensional map with micrometer resolution. The technique uses a photothermal method based on the deflection of a probe beam after heating the surface with a modulated pump. After adequate calibration, the time delay between the pump modulation and the deflection modulation provides direct information on the local thermal diffusivity. The calibration is carried out by measuring the frequency dependence of the deflection signal at several sample locations. The capabilities of the technique are illustrated with the measurement of a cross section of a surface treated steel sample. © 2010 American Institute of Physics.

Registro:

Documento: Artículo
Título:Two-dimensional imaging of thermal diffusivity in metals by scanning photodeflection detection
Autor:Archiopoli, U.C.; Mingolo, N.; Martínez, O.E.
Filiación:Dto. Física, Facultad de Ingeniería, Universidad de Buenos Aires, 1428 Buenos Aires, Argentina
Dto. Física, Facultad de Ciencias Exactas, Universidad de Buenos Aires, 1063 Buenos Aires, Argentina
CONICET, Rivadavia 1917, 1203 Buenos Aires, Argentina
Palabras clave:Cross section; Deflection signals; Frequency dependence; Metallic samples; Photodeflection detection; Photothermal methods; Probe beam; Pump modulation; Sample location; Steel samples; Two-dimensional imaging; Two-dimensional map; Calibration; Pumps; Thermal diffusion; Thermal diffusivity; Two dimensional
Año:2010
Volumen:107
Número:2
DOI: http://dx.doi.org/10.1063/1.3289218
Título revista:Journal of Applied Physics
Título revista abreviado:J Appl Phys
ISSN:00218979
CODEN:JAPIA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218979_v107_n2_p_Archiopoli

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Citas:

---------- APA ----------
Archiopoli, U.C., Mingolo, N. & Martínez, O.E. (2010) . Two-dimensional imaging of thermal diffusivity in metals by scanning photodeflection detection. Journal of Applied Physics, 107(2).
http://dx.doi.org/10.1063/1.3289218
---------- CHICAGO ----------
Archiopoli, U.C., Mingolo, N., Martínez, O.E. "Two-dimensional imaging of thermal diffusivity in metals by scanning photodeflection detection" . Journal of Applied Physics 107, no. 2 (2010).
http://dx.doi.org/10.1063/1.3289218
---------- MLA ----------
Archiopoli, U.C., Mingolo, N., Martínez, O.E. "Two-dimensional imaging of thermal diffusivity in metals by scanning photodeflection detection" . Journal of Applied Physics, vol. 107, no. 2, 2010.
http://dx.doi.org/10.1063/1.3289218
---------- VANCOUVER ----------
Archiopoli, U.C., Mingolo, N., Martínez, O.E. Two-dimensional imaging of thermal diffusivity in metals by scanning photodeflection detection. J Appl Phys. 2010;107(2).
http://dx.doi.org/10.1063/1.3289218