Precipitation mechanisms of micro-crystal graphite powder during type IIa large diamonds crystallization process
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- 作者：Shangsheng Lia ; lishsh@hpu.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Chunsheng Gonga ; Taichao Sua ; Menhua Hua ; He Zhanga ; Hongan Mab ; Xiaopeng Jiab
- 关键词：Diamond crystal ; HPHT ; Micro-crystal graphite
- 刊名：International Journal of Refractory Metals and Hard Materials
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：62
- 期：part_PA
- 页码：37-41
- 全文大小：1162 K
文摘
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For the first time, we put forward the micro crystal graphite powder in the synthesis of type IIa large diamond crystals.
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The additive Ti (Cu) and related reaction-products in metal-carbon system could change solvent property of the catalyst.
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The “relatively high temperature and relatively low pressure” condition lead to the precipitation of micro crystal graphite.