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摘要: 在Mg-B-N体系中通过控制立方氮化硼晶体的成核率及生长速度,在4.5~6.0 GPa、1 500~1 900 ℃的高压高温条件下,在几分钟时间内,成功地获得了粒径达毫米量级的立方氮化硼单晶体,其最大单晶粒径达1.6 mm。研究了该体系中立方氮化硼单晶的生长特性,讨论了该种单晶体在Mg-B-N体系中的生长机制。Abstract: Single crystals of cubic boron nitride with a diameter of about millimeter order were obtained by controlling the nucleation rate of cBN crystal under 4.5~6.0 GPa and 1 500~1 900 ℃ for several minutes. The maximal size of the cBN single crystals is 1.6 millimeter. The growth characteristic and mechanism of cBN crystal were also discussed.
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Key words:
- Cubic boron nitride /
- nucleation rate /
- growth mechanism
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