Abstract
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.
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Original Russian Text © S.A. Abrosimov, A.P. Bazhulin, A.P. Bolshakov, V.I. Konov, I.K. Krasyuk, P.P. Pashinin, V.G. Ralchenko, A.Yu. Semenov, D.N. Sovyk, I.A. Stuchebryukhov, V.E. Fortov, K.V. Khishchenko, A.A. Khomich, 2014, published in Doklady Akademii Nauk, 2014, Vol. 457, No. 1, pp. 41–44.
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Abrosimov, S.A., Bazhulin, A.P., Bolshakov, A.P. et al. Experimental investigation into polycrystalline and single-crystal diamonds under negative pressures formed by picosecond laser pulses. Dokl. Phys. 59, 309–312 (2014). https://doi.org/10.1134/S1028335814070015
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DOI: https://doi.org/10.1134/S1028335814070015