Transient Temperature During the Vaporization of Liquid on a Pulsed Laser-Heated Solid Surface
| Autor: | Costas P. Grigoropoulos, H. K. Park, C. C. Poon, Andrew C. Tam, Xiang Zhang |
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| Rok vydání: | 1996 |
| Předmět: |
Materials science
Excimer laser business.industry Mechanical Engineering medicine.medical_treatment Nanosecond Condensed Matter Physics Laser Temperature measurement Molecular physics law.invention Optics Mechanics of Materials law Boiling Metastability Vaporization medicine General Materials Science Thin film business |
| Zdroj: | Journal of Heat Transfer. 118:702-708 |
| ISSN: | 1528-8943 0022-1481 |
| Popis: | The thermodynamics of the rapid vaporization of a liquid on a solid surface heated by an excimer laser pulse is studied experimentally. The transient temperature field is measured by monitoring the photothermal reflectance of an embedded thin film in nanosecond time resolution. The transient reflectivity is calibrated by considering a temperature gradient across the sample based on the static measurements of the thin film optical properties at elevated temperatures. The dynamics of bubble nucleation, growth, and collapse is detected by probing the optical specular reflectance. The metastability behavior of the liquid and the criterion for the onset of liquid–vapor phase transition in nanosecond time scale are obtained quantitatively for the first time. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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