Testing stability of surfaces and coatings by resonant photoacoustic phase transition detection
A technique has been developed for the determination of the phase transition temperature of very small samples or thin films and coatings. The technique relies on the determination of changes in the heat capacity of the surface by resonant piezoelectric detection of the photoacoustic signal. The sam...
Guardado en:
| Publicado: |
2002
|
|---|---|
| Materias: | |
| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02670844_v18_n1_p64_Cesa http://hdl.handle.net/20.500.12110/paper_02670844_v18_n1_p64_Cesa |
| Aporte de: |
| id |
paper:paper_02670844_v18_n1_p64_Cesa |
|---|---|
| record_format |
dspace |
| spelling |
paper:paper_02670844_v18_n1_p64_Cesa2023-06-08T15:23:38Z Testing stability of surfaces and coatings by resonant photoacoustic phase transition detection Coatings Expansion Heating Natural frequencies Phase transitions Photoacoustic effect Piezoelectricity Semiconductor lasers Specific heat Temperature Thin films Piezoelectric detector Resonant photoacoustic phase transition detection Testing stability Surface structure A technique has been developed for the determination of the phase transition temperature of very small samples or thin films and coatings. The technique relies on the determination of changes in the heat capacity of the surface by resonant piezoelectric detection of the photoacoustic signal. The sample, is illuminated by means of a low power diode laser modulated at the resonant frequency of a piezoelectric detector. The detector senses the acoustic signal generated by the expansion of the surface that has been slightly heated (about 1K) by the laser. The signal is monitored as the sample is heated at an established rate, and the phase transition temperature is determined by the change in the amplitude and phase of the signal. As the penetration of the light in metals is very small (well below 1 μm), the technique is particularly suitable for the study of surface coatings and thin films. 2002 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02670844_v18_n1_p64_Cesa http://hdl.handle.net/20.500.12110/paper_02670844_v18_n1_p64_Cesa |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Coatings Expansion Heating Natural frequencies Phase transitions Photoacoustic effect Piezoelectricity Semiconductor lasers Specific heat Temperature Thin films Piezoelectric detector Resonant photoacoustic phase transition detection Testing stability Surface structure |
| spellingShingle |
Coatings Expansion Heating Natural frequencies Phase transitions Photoacoustic effect Piezoelectricity Semiconductor lasers Specific heat Temperature Thin films Piezoelectric detector Resonant photoacoustic phase transition detection Testing stability Surface structure Testing stability of surfaces and coatings by resonant photoacoustic phase transition detection |
| topic_facet |
Coatings Expansion Heating Natural frequencies Phase transitions Photoacoustic effect Piezoelectricity Semiconductor lasers Specific heat Temperature Thin films Piezoelectric detector Resonant photoacoustic phase transition detection Testing stability Surface structure |
| description |
A technique has been developed for the determination of the phase transition temperature of very small samples or thin films and coatings. The technique relies on the determination of changes in the heat capacity of the surface by resonant piezoelectric detection of the photoacoustic signal. The sample, is illuminated by means of a low power diode laser modulated at the resonant frequency of a piezoelectric detector. The detector senses the acoustic signal generated by the expansion of the surface that has been slightly heated (about 1K) by the laser. The signal is monitored as the sample is heated at an established rate, and the phase transition temperature is determined by the change in the amplitude and phase of the signal. As the penetration of the light in metals is very small (well below 1 μm), the technique is particularly suitable for the study of surface coatings and thin films. |
| title |
Testing stability of surfaces and coatings by resonant photoacoustic phase transition detection |
| title_short |
Testing stability of surfaces and coatings by resonant photoacoustic phase transition detection |
| title_full |
Testing stability of surfaces and coatings by resonant photoacoustic phase transition detection |
| title_fullStr |
Testing stability of surfaces and coatings by resonant photoacoustic phase transition detection |
| title_full_unstemmed |
Testing stability of surfaces and coatings by resonant photoacoustic phase transition detection |
| title_sort |
testing stability of surfaces and coatings by resonant photoacoustic phase transition detection |
| publishDate |
2002 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_02670844_v18_n1_p64_Cesa http://hdl.handle.net/20.500.12110/paper_02670844_v18_n1_p64_Cesa |
| _version_ |
1768542884860002304 |