Abstract
Results of an experimental-theoretical study of spallation in synthetic diamonds are presented. In this study, data were first obtained on dynamic tensile strength of poly- and singlecrystal diamond samples at mechanical loads of up to 0.34 TPa and strain rates of 10–100 µs−1. Shock-wave loading was performed by 70 ps laser pulses on a Kamerton-T facility using a Nd:glass laser (second harmonics λ = 527 nm, pulse energy of up to ≈3 J) at intensities of ≈8 TW/cm2. The obtained maximal value of the spall strength ≈16.4 GPa is 24% of the theoretical ultimate strength of diamond. Raman scattering experiments showed that a small amount of diamond was graphitized in the spall area on the backside of the sample.
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Original Russian Text © S.A. Abrosimov, A.P. Bazhulin, A.P. Bolshakov, V.I. Konov, I.K. Krasiuk, P.P. Pashinin, V.G. Ralchenko, A.Yu. Semenov, D.N. Sovyk, I.A. Stuchebryukhov, V.E. Fortov, K.V. Khishchenko, A.A. Khomich.
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Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 56, No. 1, pp. 171–179, January–February, 2015.
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Abrosimov, S.A., Bazhulin, A.P., Bolshakov, A.P. et al. Strength of synthetic diamonds under tensile stresses produced by picosecond laser action. J Appl Mech Tech Phy 56, 143–149 (2015). https://doi.org/10.1134/S0021894415010216
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DOI: https://doi.org/10.1134/S0021894415010216