caa a22 4500 467951802 CHVBK 20180322200726.0 cr unu---uuuuu 170328e19861101xx s 000 0 eng 10.1007/BF00553469 doi (NATIONALLICENCE)springer-10.1007/BF00553469 (NATIONALLICENCE)springer-10.1007/BF02431652 Structural changes of wurtzite-type and zincblende-type boron nitrides by shock treatments [Elektronische Daten] [Tamotsu Akashi, Han-Ryong Pak, Akira Sawaoka] Wurtzite-type boron nitride (w-BN) and zincblende-type boron nitride (z-BN) powders were shock-treated in the pressure range of 60 to 200 GPa to clarify their polymorphic transformations. The recovered BN powders revealed the effects of the shock wave and residual temperature on phase transition of BN. W-BN was partly transformed to z-BN by shock compression at a pressure of about 100 GPa. At pressures greater than 100 GPa, portions of the w-BN and z-BN powders changed into the BN having a turbostratic structure. Subsequently, this form was crystallized to graphite-like BN (g-BN) and a new form of BN due to high residual temperatures. This new BN modification, probably stabilized by the high surface energy associated with its fine crystallite size of less than 50 nm, was identified as fcc structure with a lattice parameter ofa 0 = 0.8405 nm. The transformation of z-BN to w-BN was not detected in this post-shock study, as was observed in static high pressure studies. Chapman and Hall Ltd., 1986 Akashi Tamotsu Center for Explosives Technology Research, New Mexico Institute of Mining and Technology, 87801, Socorro, New Mexico, USA aut Pak Han-Ryong Center for Explosives Technology Research, New Mexico Institute of Mining and Technology, 87801, Socorro, New Mexico, USA aut Sawaoka Akira Center for Explosives Technology Research, New Mexico Institute of Mining and Technology, 87801, Socorro, New Mexico, USA aut Journal of Materials Science Kluwer Academic Publishers 21/11(1986-11-01), 4060-4066 0022-2461 21:11<4060 1986 21 10853 https://doi.org/10.1007/BF00553469 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00553469 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Akashi Tamotsu Center for Explosives Technology Research, New Mexico Institute of Mining and Technology, 87801, Socorro, New Mexico, USA aut NATIONALLICENCE 700 1- Pak Han-Ryong Center for Explosives Technology Research, New Mexico Institute of Mining and Technology, 87801, Socorro, New Mexico, USA aut NATIONALLICENCE 700 1- Sawaoka Akira Center for Explosives Technology Research, New Mexico Institute of Mining and Technology, 87801, Socorro, New Mexico, USA aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers 21/11(1986-11-01), 4060-4066 0022-2461 21:11<4060 1986 21 10853 NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02431652 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer