The binary system of BN-Mg3N2 under high pressures and temperatures
Phase relations in the binary system BN-Mg3N2 were investigated in the pressure range, P, from 3.0 GPa to 8.0 GPa and temperature, T, up to 1900 K by means of in situ DTA and XRD of the quenched products. It was found that the succession in formation of the intermediate compounds Mg3BN3 (HP-phase) a...
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| Veröffentlicht in: | Journal of materials science 1994-12, Vol.29 (24), p.6616-6619 |
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| container_title | Journal of materials science |
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| creator | Gladkaya, I. S. Kremkova, G. N. Bendeliani, N. A. Lorenz, H. Kuehne, U. |
| description | Phase relations in the binary system BN-Mg3N2 were investigated in the pressure range, P, from 3.0 GPa to 8.0 GPa and temperature, T, up to 1900 K by means of in situ DTA and XRD of the quenched products. It was found that the succession in formation of the intermediate compounds Mg3BN3 (HP-phase) and Mg3B2N4 depends on the molar ratios of hexagonal boron nitride (hBN) and Mg3N2 and on the P-T conditions. In the P-T region of cubic boron nitride (cBN) growth, the system has three metastable eutectics such as Mg3N2-hBN, Mg3BN3-hBN and Mg3B2N4-hBN. It was found that eutectic temperatures are pressure dependent. The difference in the lower-temperature limits of cBN growth regions is explained by cBN crystallisation from different eutectic melts. 11 refs. |
| doi_str_mv | 10.1007/BF00354030 |
| format | Article |
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It was found that eutectic temperatures are pressure dependent. The difference in the lower-temperature limits of cBN growth regions is explained by cBN crystallisation from different eutectic melts. 11 refs.</abstract><doi>10.1007/BF00354030</doi><tpages>4</tpages></addata></record> |
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| title | The binary system of BN-Mg3N2 under high pressures and temperatures |
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