The Effect of Water on the Synthesis of Cubic Boron Nitride Crystal in the System of Mg-hBN
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摘要: 研究了4.5~5.5 GPa、1 400~1 800 ℃ 条件下，两种形态水自由水与束缚水对在Mg-hBN体系中合成cBN晶体的影响。结果表明：水的形态与添加水的量对合成cBN晶体的颜色、成核率及生长条件有重要影响。自由水可抑制cBN晶体的成核数量，而束缚水可以改变cBN晶体的颜色并降低合成温度。Abstract: Synthesis of cubic boron nitride (cBN) crystal in the system of Mg-hBN with water, in the form of free or bonded, was investigated under the pressure and temperature of 4.5~5.5 GPa and 1 400~1 800 ℃. Results indicate that the form and the amount of water have important effect on the colour, the nucleation rate and the growth of cubic boron nitride crystals. Free water can depress the number of nucleus, and bonded water will change the colour and decrease the temperature for the synthesis of cBN crystals.
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