Abstract In this paper, boron-based diamonds were synthesized at high temperature and pressure by using boron-based, hexagonal boron nitride and borax three kinds of boron-based materials. The characterization of diamond structure and properties was used to investigate the composite addition of various boron sources. The effect of boron diamond. It has been found that the synthesis of diamond by iron-based catalysts with multiple boron sources can effectively stabilize the supply of boron source and increase the boron content of diamond. With the increase of boron content, the crystal habit of diamond is gradually dominated by (111) crystal plane, and the main mechanical properties and thermal stability are obviously improved. The experimental results fully demonstrate that the multiple boron source composite addition is more conducive to improving the grade of boron-containing diamond. (Diamond and Abrasives Engineering, 2009, Issue 2)

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