| Autor: |
Tiwari, Pawan K., Tripathi, V. K. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 11/15/2002, Vol. 92 Issue 10, p5680, 4p, 1 Diagram, 4 Graphs |
| Abstrakt: |
The efficacy of an intense laser for dissolving metallic particles in material processing plasmas has been examined. The laser penetrates in the skin layer of the particles and heats them. The temperature rise of the particle is, however, uniform due to the predominance of thermal conduction. As the particle temperature rises heating rate increases due to increase in electron-phonon collisional frequency. Once the transition to liquid phase occurs the conductivity falls drastically slowing the heating rate. However, in the vapor phase ionization begins and the plasma thus formed expands at the velocity of sound while simultaneously absorbing energy from the tail of the laser pulse. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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