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Multilayered polycrystallization in single-crystal YSZ by laser-shock compression
Author
Nishimura, YasuhikoKitagawa, Yoneyoshi
Mori, Yoshitaka
Hioki, Tatsumi
Azuma, Hirozumi
Motohiro, Tomoyoshi
Komeda, Osamu
Ishii, Katsuhiro
Hanayama, Ryohei
Sekine, Takashi
Sunahara, Atsushi
Kajino, Tsutomu
Nishi, Teppei
Kondo, Takuya
Fujine, Manabu
Sato, Nakahiro
Kurita, Takashi
Kawashima, Toshiyuki
Kan, Hirofumi
Miura, Eisuke
Sentoku, Yasuhiko
Date
2015Type
ArticleAbstract
A single shot of an ultra-intense laser with 0.8 J of energy and a pulse width of 110 fs (peak intensity of 1.15 x 10(17) W cm(-2)) is divided into two beams and the two beams counter-irradiated onto a 0.5 mm-thick single crystal yttria-stabilized zirconia (YSZ), changing the YSZ into a multilayered polycrystalline state. The laser-driven shock wave of the intensity similar to 7.6x10(12) Pa penetrated the crystal as deep as 96 mu m, causing formation of a four-layered structure (the first layer from the surface to 12 mu m, the second from 12 to 28 mu m, the third from 28 to 96 mu m, and the fourth from 96 to 130 mu m, respectively). The grain size of the first layer was 1 mu m, while that of the second layer was broken into a few tens nanometers. The grain size of the third layer was a few hundred nanometers to a few ten micrometers. The area deeper than 96 mu m remained as a single crystal. The plasma heat wave might remelt the first layer, resulting in the grain size becoming larger than that of the second layer. The surface polycrystallization seems to maintain the residual stresses frozen in the film thickness direction. Our experimentally observed spatial profile of the grain size can be explained by this shock and heat waves model.
Permanent link
http://hdl.handle.net/11714/5968Additional Information
Journal Title | Journal of Physics D: Applied Physics |
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Rights | Creative Commons Attribution 3.0 Unported |
Rights Holder | Authors |