Experimental study of the effect of laser beams on transparent dielectrics
| Autor: | Yu. I. Yudin, Yu. V. Tsvetkova, S. A. Samsonov, N. P. Novikov, A. A. Kholodilov, S. S. Saluén'ya |
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| Rok vydání: | 1972 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics business.industry General Mathematics General Engineering Dielectric Polymer Radiation Condensed Matter Physics Laser Industrial and Manufacturing Engineering law.invention Biomaterials Stress (mechanics) Wavelength Optics chemistry Mechanics of Materials law Ceramics and Composites Irradiation Composite material business Intensity (heat transfer) |
| Zdroj: | Polymer Mechanics. 5:734-742 |
| ISSN: | 1573-8922 0032-390X |
| DOI: | 10.1007/bf00855545 |
| Popis: | The destruction of transparent polymer blocks by laser action is investigated. It is established that microscopic breakdown regions, whose size remains constant in time, are formed in the zone of action of the laser pulse. The intensity of the radiation from these microregions varies with time and corresponds to a temperature of ∼(2–4) · 103°K. The microregions are located near, but not at the centers of the cracks. The previously irradiated region of the polymer is shown to be in a state of stress. The possibility of thermal explosion with subsequent crack formation is evaluated. The continued development of the cracks as a result of repeated irradiation is studied. The temperature of the gas in the large cracks has been measured and found to exceed room temperature by 15°. The molecular weight has been measured before and after irradiation and found to decrease. The effect of laser beams of various wavelengths is considered. The rate of growth of the disk-shaped cracks has been measured. |
| Databáze: | OpenAIRE |
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