The characteristics of diamonds crystallized using Fe-C-H at high pressure and temperature

被引：8

作者：

Sun, Shishuai ^{[1
]}

Liu, Manna ^{[2
,3
]}

Cui, Wen ^{[4
]}

Jia, Xiaopeng ^{[5
]}

Ma, Hong-an ^{[5
]}

Yang, Liying ^{[2
,3
]}

机构：

[1] Tianjin Univ Technol, Coll Sci, Tianjin 300384, Peoples R China

[2] Tianjin Univ Technol, Key Lab Display Mat & Photoelect Devices, Tianjin 300384, Peoples R China

[3] Tianjin Univ Technol, Sch Mat Sci & Engn, Tianjin 300384, Peoples R China

[4] Tianjin Normal Univ, Coll Phys & Mat Sci, Tianjin 300384, Peoples R China

[5] Jilin Univ, State Key Lab Superhard Mat, Changchun 130012, Peoples R China

来源：

INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS | 2016年 / 61卷

基金：

中国国家自然科学基金;

关键词：

HPHT; Diamond; Hydrogen doped; Catalyst; CARBON SYSTEM; POWDER CATALYST; GROWTH; NITROGEN; IMPURITY; HPHT; HYDROGEN; ALLOY; NAN3;

D O I：

10.1016/j.ijrmhm.2016.08.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Diamond crystallization in an Fe-C system with C10H10Fe additive(collectively called the Fe-C-H system) has been studied at 5.0-6.0 GPa and temperatures ranging from 1400 to 1700 degrees C. Both spontaneous diamond nucleation and growth were studied. The results showed that the stable form of diamond growth is octahedral in Fe-C-H systems, which is similar to pure Fe-C systems. However, the diamond morphologies changed from high quality octahedral to aggregated octahedral as the amount of C10H10Fe increased, accompanied by a deterioration of the surfaces. The FTIR results indicated that hydrogen-doped diamonds with less than 1 ppm nitrogen are easily synthesized in this system. The crystallization of diamonds in the Fe-C-H system was not only affected by the pressure and temperature conditions, but also by the amount of C10H10Fe additive. This was attributed to changes in the pure Fe catalyst caused by the elemental hydrogen produced by the decomposition of C10H10Fe. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：79 / 83

页数：5

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