Kinetics of phase transformation from hBN to cBN in the presence of Mg3BN3 catalyst |
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| Authors: | O Fukunaga S Nakano J Maki H Vollstaedt H Lorenz |
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| Institution: | 1. Dept. Inorganic Materials , Tokyo Institute of Technology , Meguro-ku, Tokyo, 152, JAPAN;2. Inst. High Pressure Geophysics, Acad. Sci. GDR , Potsdam, GDR |
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| Abstract: | Abstract Transformation kinetics from hBN to cBN has been studied at 6 GPa with changing reaction temperature and content of catalyst mixed with hBN powder. At lower catalyst content (3–10 wt %), rate of transformation was extraordinary rapid between 1300 and 1350 C. At higher catalyst content (30–50 wt %), rate of transformation was decreased. Normal nucleation kinetics was observed at about 1500 C. The rapid transformation temperature region correlates characteristic behavior of the sintering process. |
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| Keywords: | phase transformation hBN to cBN kinetics |
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