Graphitization of Glassy Carbon after Compression at Room Temperature

被引：53

作者：

Shiell, T. B. ^{[1
]}

McCulloch, D. G. ^{[2
,3
]}

McKenzie, D. R. ^{[4
]}

Field, M. R. ^{[3
]}

Haberl, B. ^{[5
]}

Boehler, R. ^{[5
,6
]}

Cook, B. A. ^{[2
]}

de Tomas, C. ^{[7
]}

Suarez-Martinez, I ^{[7
]}

Marks, N. A. ^{[7
]}

Bradby, J. E. ^{[1
]}

机构：

[1] Australian Natl Univ, Res Sch Phys & Engn, Dept Elect Mat Engn, Canberra, ACT 2601, Australia

[2] RMIT Univ, Sch Sci, Phys, Melbourne, Vic 3001, Australia

[3] RMIT Univ, RMIT Microscopy & Microanal Facil, Melbourne, Vic 3001, Australia

[4] Univ Sydney, Sch Phys, Sydney, NSW 2006, Australia

[5] Oak Ridge Natl Lab, Neutron Scattering Div, Neutron Sci Directorate, Oak Ridge, TN 37831 USA

[6] Carnegie Inst Sci, Geophys Lab, 5251 Branch Rd Northwest, Washington, DC 20015 USA

[7] Curtin Univ, Dept Phys & Astron, Perth, WA 6845, Australia

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 120卷 / 21期

基金：

澳大利亚研究理事会;

关键词：

STRESS-INDUCED FORMATION; AMORPHOUS-CARBON; SPECTROSCOPY; DEFORMATION; GRAPHITE; FILMS;

D O I：

10.1103/PhysRevLett.120.215701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Glassy carbon is a technologically important material with isotropic properties that is nongraphitizing up to similar to 3000 degrees C and displays complete or "superelastic" recovery from large compression. The pressure limit of these properties is not yet known. Here we use experiments and modeling to show permanent densification, and preferred orientation occurs in glassy carbon loaded to 45 GPa and above, where 45 GPa represents the limit to the superelastic and nongraphitizing properties of the material. The changes are explained by a transformation from its sp(2) rich starting structure to a sp(3) rich phase that reverts to fully sp(2) bonded oriented graphite during pressure release.

引用

页数：6

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