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The characteristic of the process is that the second pressure pause point is close to the graphite-diamond phase equilibrium line but has entered the diamond phase, the pause time is 15-30s, and the holding pressure is slightly higher than the second pause pressure, so that the diamond is formed in the superior crystal region. Nuclear, growing in the rich crystal region. Experiments have shown that this process can obtain high quality and high yield diamonds.
Diamond and Abrasives Engineering, 2000, Issue 6
This paper analyzes the shortcomings of a suspension of the staged pressurization process, and proposes a diamond synthesis process with a second pause and a stepwise pressurization.