6533b857fe1ef96bd12b3a2d
RESEARCH PRODUCT
Laser heating and ablation at high repetition rate in thermal confinement regime
A. SemerokRoland OltraS. FomichevJ.-m. WeulersseF. Brygosubject
Materials sciencePACS: 81.65 Cf; 42.62 Cf; 61.82 Msmedicine.medical_treatmentGeneral Physics and Astronomy02 engineering and technology01 natural sciencesFluenceModellinglaw.invention010309 opticsThermal conductivityOpticslaw0103 physical sciencesmedicinePyrometerLaser ablationLaser heatingbusiness.industryPulse durationHigh repetition rateSurfaces and InterfacesGeneral Chemistry021001 nanoscience & nanotechnologyCondensed Matter PhysicsAblationLaserLaser ablationSurfaces Coatings and FilmsHeat capacity rateThermal confinement regime0210 nano-technologybusinessdescription
International audience; Laser heating and ablation of materials with low absorption and thermal conductivity (paint and cement) were under experimental and theoretical investigations. The experiments were made with a high repetition rate Q-switched Nd:YAG laser (10 kHz, 90 ns pulse duration and l = 532 nm). High repetition rate laser heating resulted in pulse per pulse heat accumulation. A theoretical model of laser heating was developed and demonstrated a good agreement between the experimental temperatures measured with the infrared pyrometer and the calculated ones. With the fixed wavelength and laser pulse duration, the ablation threshold fluence of paint was found to depend on the repetition rate and the number of applied pulses. With a high repetition rate, the threshold fluence decreased significantly when the number of applied pulses was increasing. The experimentally obtained thresholds were well described by the developed theoretical model. Some specific features of paint heating and ablation with high repetition rate lasers are discussed.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2006-09-01 | Applied Surface Science |