Formation of filamentous carbon through dissociation of chromium carbide under hydrothermal conditions

B. Basavalingu, P. Madhusudan, A. S. Dayananda, K. Lal, K. Byrappa, Masahiro Yoshimura

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Synthesis of filamentous carbon through the decomposition of chromium carbide was studied employing hydrothermal technique in the pressure and temperature range of 100-200 MPa and 350-800 °C respectively. It was found that chromium carbide dissociates into chromium oxide in the presence of water at temperature <400 °C. But, the formation of free elemental carbon as filamentous particles was noticed in the presence of organic compounds at temperatures above 600 °C. The organic compounds are known to dissociate to C-O-H supercritical fluids under hydrothermal condition. The supercritical fluids generated by the dissociation of organic compounds have great influence on the decomposition of chromium carbide. The scanning electron microscopic (SEM) studies of the experimental run products show that the fibrous or filamentous form of carbon was found with a few spherical shaped carbons, in the chromium carbide-organic compound runs. These carbon particles were solid curved filaments with a mean diameter of 50-100 nm. Micro Raman spectroscopic studies show that the filaments have sp 2 -hybridized carbon atoms.

Original languageEnglish
Pages (from-to)2153-2157
Number of pages5
JournalJournal of Materials Science
Volume43
Issue number7
DOIs
Publication statusPublished - 2008 Apr 1

Fingerprint

Chromium
Carbides
Carbon
Organic compounds
Supercritical fluids
Decomposition
Temperature
Scanning
Atoms
Oxides
Electrons
Water

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Basavalingu, B. ; Madhusudan, P. ; Dayananda, A. S. ; Lal, K. ; Byrappa, K. ; Yoshimura, Masahiro. / Formation of filamentous carbon through dissociation of chromium carbide under hydrothermal conditions. In: Journal of Materials Science. 2008 ; Vol. 43, No. 7. pp. 2153-2157.
@article{a6a4d6d17ac440c1a9d1d59917da6d01,
title = "Formation of filamentous carbon through dissociation of chromium carbide under hydrothermal conditions",
abstract = "Synthesis of filamentous carbon through the decomposition of chromium carbide was studied employing hydrothermal technique in the pressure and temperature range of 100-200 MPa and 350-800 °C respectively. It was found that chromium carbide dissociates into chromium oxide in the presence of water at temperature <400 °C. But, the formation of free elemental carbon as filamentous particles was noticed in the presence of organic compounds at temperatures above 600 °C. The organic compounds are known to dissociate to C-O-H supercritical fluids under hydrothermal condition. The supercritical fluids generated by the dissociation of organic compounds have great influence on the decomposition of chromium carbide. The scanning electron microscopic (SEM) studies of the experimental run products show that the fibrous or filamentous form of carbon was found with a few spherical shaped carbons, in the chromium carbide-organic compound runs. These carbon particles were solid curved filaments with a mean diameter of 50-100 nm. Micro Raman spectroscopic studies show that the filaments have sp 2 -hybridized carbon atoms.",
author = "B. Basavalingu and P. Madhusudan and Dayananda, {A. S.} and K. Lal and K. Byrappa and Masahiro Yoshimura",
year = "2008",
month = "4",
day = "1",
doi = "10.1007/s10853-007-1927-9",
language = "English",
volume = "43",
pages = "2153--2157",
journal = "Journal of Materials Science",
issn = "0022-2461",
publisher = "Springer Netherlands",
number = "7",

}

Formation of filamentous carbon through dissociation of chromium carbide under hydrothermal conditions. / Basavalingu, B.; Madhusudan, P.; Dayananda, A. S.; Lal, K.; Byrappa, K.; Yoshimura, Masahiro.

In: Journal of Materials Science, Vol. 43, No. 7, 01.04.2008, p. 2153-2157.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Formation of filamentous carbon through dissociation of chromium carbide under hydrothermal conditions

AU - Basavalingu, B.

AU - Madhusudan, P.

AU - Dayananda, A. S.

AU - Lal, K.

AU - Byrappa, K.

AU - Yoshimura, Masahiro

PY - 2008/4/1

Y1 - 2008/4/1

N2 - Synthesis of filamentous carbon through the decomposition of chromium carbide was studied employing hydrothermal technique in the pressure and temperature range of 100-200 MPa and 350-800 °C respectively. It was found that chromium carbide dissociates into chromium oxide in the presence of water at temperature <400 °C. But, the formation of free elemental carbon as filamentous particles was noticed in the presence of organic compounds at temperatures above 600 °C. The organic compounds are known to dissociate to C-O-H supercritical fluids under hydrothermal condition. The supercritical fluids generated by the dissociation of organic compounds have great influence on the decomposition of chromium carbide. The scanning electron microscopic (SEM) studies of the experimental run products show that the fibrous or filamentous form of carbon was found with a few spherical shaped carbons, in the chromium carbide-organic compound runs. These carbon particles were solid curved filaments with a mean diameter of 50-100 nm. Micro Raman spectroscopic studies show that the filaments have sp 2 -hybridized carbon atoms.

AB - Synthesis of filamentous carbon through the decomposition of chromium carbide was studied employing hydrothermal technique in the pressure and temperature range of 100-200 MPa and 350-800 °C respectively. It was found that chromium carbide dissociates into chromium oxide in the presence of water at temperature <400 °C. But, the formation of free elemental carbon as filamentous particles was noticed in the presence of organic compounds at temperatures above 600 °C. The organic compounds are known to dissociate to C-O-H supercritical fluids under hydrothermal condition. The supercritical fluids generated by the dissociation of organic compounds have great influence on the decomposition of chromium carbide. The scanning electron microscopic (SEM) studies of the experimental run products show that the fibrous or filamentous form of carbon was found with a few spherical shaped carbons, in the chromium carbide-organic compound runs. These carbon particles were solid curved filaments with a mean diameter of 50-100 nm. Micro Raman spectroscopic studies show that the filaments have sp 2 -hybridized carbon atoms.

UR - http://www.scopus.com/inward/record.url?scp=40849124316&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=40849124316&partnerID=8YFLogxK

U2 - 10.1007/s10853-007-1927-9

DO - 10.1007/s10853-007-1927-9

M3 - Article

AN - SCOPUS:40849124316

VL - 43

SP - 2153

EP - 2157

JO - Journal of Materials Science

JF - Journal of Materials Science

SN - 0022-2461

IS - 7

ER -