Phase Transformations of n-Layer Graphenes into Diamond at High Pressures and Temperatures

被引：12

作者：

Shul'zhenko, A. A. ^{[1
]}

Jaworska, L. ^{[2
]}

Sokolov, A. N. ^{[1
]}

Gargin, V. G. ^{[1
]}

Belyavina, N. N. ^{[3
]}

机构：

[1] Natl Acad Sci Ukraine, Bakul Inst Superhard Mat, Vul Avtozavodska 2, UA-04074 Kiev, Ukraine

[2] Inst Adv Mfg Technol, 37a Wroclawska St, PL-30011 Krakow, Poland

[3] Taras Shevchenko Kiev Natl Univ, Vul Volodymyrska 60, UA-01601 Kiev, Ukraine

来源：

JOURNAL OF SUPERHARD MATERIALS | 2017年 / 39卷 / 02期

关键词：

graphene; graphite; diamond; synthesis; phase transformation; CARBON;

D O I：

10.3103/S1063457617020010

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of high pressure (7.7 GPa) and temperature (1700A degrees C) on the phase transformations of both graphene plates with a high degree of crystallinity having less than four layers and thickness not exceeding 5 nm and powders of multilayer graphenes (of 10-20 monolayers) and 8-12 nm in thickness was experimentally studied in the presence of carbon solvents (Ni-Mn alloy, iron). Factors both contributing and inhibiting the diamond synthesis from graphene in the presence of the solvents for carbon are defined. It is shown that the transformation of multilayer graphenes into diamond at high pressure and temperature by a two-stage scheme of the diamond synthesis (i.e., after three-dimensional structural ordering of graphene at the first stage) is preferable.

引用

页码：75 / 82

页数：8

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