Experimental investigation into polycrystalline and single-crystal diamonds under negative pressures formed by picosecond laser pulses
| Autor: | Pavel P Pashinin, A. Yu. Semenov, Vitali I. Konov, Konstantin V. Khishchenko, S A Abrosimov, V. G. Ralchenko, I. A. Stuchebryukhov, Andrey Bolshakov, D. N. Sovyk, I. K. Krasyuk, A.A. Khomich, Vladimir E. Fortov, A. P. Bazhulin |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Synthetic diamond business.industry Computational Mechanics General Physics and Astronomy Diamond engineering.material Laser Spall law.invention symbols.namesake Optics Mechanics of Materials law symbols engineering Spallation Crystallite Atomic physics business Single crystal Raman scattering |
| Zdroj: | Doklady Physics. 59:309-312 |
| ISSN: | 1562-6903 1028-3358 |
| DOI: | 10.1134/s1028335814070015 |
| Popis: | Results of the experimental investigation of the spallation phenomenon in polycrystalline and single-crystal synthetic diamond are presented. The shock-wave action on the target was formed by a laser pulse with a duration of 70 ps using a Kamerton-T installation. To attain the ablation pressure of 0.66 TPa on the face surface of the target, the laser radiation of the Nd:glass laser (second harmonics λ = 527 nm, the pulse energy is 2.5 J) was used at intensity up to 2 × 1013 W/cm2. The attained maximal spall strength of diamond σ* ∼ 16.5 GPa is 24% of the theoretical ultimate strength. The Raman scattering indicates that a small amount of crystalline diamond is graphitized in the spall region on the back target side. |
| Databáze: | OpenAIRE |
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