ULTRAHARD AND SUPERHARD CARBON PHASES PRODUCED FROM C-60 BY HEATING AT HIGH-PRESSURE - STRUCTURAL AND RAMAN STUDIES

被引:154
作者
BLANK, VD [1 ]
BUGA, SG [1 ]
SEREBRYANAYA, NR [1 ]
DENISOV, VN [1 ]
DUBITSKY, GA [1 ]
IVLEV, AN [1 ]
MAVRIN, BN [1 ]
POPOV, MY [1 ]
机构
[1] SCI & TECH CTR SUPERHARD MAT,TROITSK 142092,RUSSIA
关键词
D O I
10.1016/0375-9601(95)00564-J
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
Investigations of X-ray diffraction patterns, Raman spectra, hardness and other physical properties were carried out for fullerite after a heat treatment up to 1830 K at 9.5 and 13 GPa nonhydrostatic pressure of bulk samples. Both superhard and ultrahard forms of carbon have been obtained from C-60 at 620-1830 K. The hardness of the materials exceeded that of diamond. The X-ray and Raman measurements have shown that both crystal structures and fullerene molecules were retained in superhard and ultrahard states, but a gradual increase of disorder occurred and a random network of linked molecules at high temperatures was formed.
引用
收藏
页码:208 / 216
页数:9
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