Electron-energy loss spectroscopy and Raman studies of nanosized chromium carbide synthesized during carbothermal reduction process from precursor Cr(CO)6

Hao Tung Lin; Pramoda K. Nayak; Sheng Chang Wang; Shin Yun Chang; Jow Lay Huang

doi:10.1016/j.jeurceramsoc.2010.12.005

Electron-energy loss spectroscopy and Raman studies of nanosized chromium carbide synthesized during carbothermal reduction process from precursor Cr(CO)6

Hao Tung Lin
, Pramoda K. Nayak
, Sheng Chang Wang
, Shin Yun Chang
, Jow Lay Huang

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

Nanosized chromium carbide has been prepared by metal-organic chemical vapour deposition (MOCVD) method in a fluidized bed and carburized in the mixture of CH₄/H₂ atmosphere in temperature range 700-850°C. The carburization process involves carbon deposition on the outer surface of the Cr₂O₃ powder, followed by carbon diffusion into the powder, leading to formation of metastable Cr₃C_2-x phase and stable Cr₃C₂. The phase transformation from Cr₂O₃ to Cr₃C₂ via an intermediate state Cr₃C_2-x has been identified using electron-energy loss spectroscopy (EELS) and micro-Raman spectroscopy. We could hypothesize that the formation of carbon nanofilms surrounding the carbide crystallites provides the stress and assist the phase transformation from metastable Cr₃C_2-x to stable Cr₃C₂.

Original language	English
Pages (from-to)	2481-2487
Number of pages	7
Journal	Journal of the European Ceramic Society
Volume	31
Issue number	14
DOIs	https://doi.org/10.1016/j.jeurceramsoc.2010.12.005
Publication status	Published - 2011 Nov

All Science Journal Classification (ASJC) codes

Ceramics and Composites
Materials Chemistry

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10.1016/j.jeurceramsoc.2010.12.005

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@article{f1252be466b14c02bd1113b1419094d5,

title = "Electron-energy loss spectroscopy and Raman studies of nanosized chromium carbide synthesized during carbothermal reduction process from precursor Cr(CO)6",

abstract = "Nanosized chromium carbide has been prepared by metal-organic chemical vapour deposition (MOCVD) method in a fluidized bed and carburized in the mixture of CH4/H2 atmosphere in temperature range 700-850°C. The carburization process involves carbon deposition on the outer surface of the Cr2O3 powder, followed by carbon diffusion into the powder, leading to formation of metastable Cr3C2-x phase and stable Cr3C2. The phase transformation from Cr2O3 to Cr3C2 via an intermediate state Cr3C2-x has been identified using electron-energy loss spectroscopy (EELS) and micro-Raman spectroscopy. We could hypothesize that the formation of carbon nanofilms surrounding the carbide crystallites provides the stress and assist the phase transformation from metastable Cr3C2-x to stable Cr3C2.",

author = "Lin, \{Hao Tung\} and Nayak, \{Pramoda K.\} and Wang, \{Sheng Chang\} and Chang, \{Shin Yun\} and Huang, \{Jow Lay\}",

note = "Funding Information: Authors are thankful to National Science Council of Taiwan for its financial support under the contract No: 99-2923-E-006-002-MY3.",

year = "2011",

month = nov,

doi = "10.1016/j.jeurceramsoc.2010.12.005",

language = "English",

volume = "31",

pages = "2481--2487",

journal = "Journal of the European Ceramic Society",

issn = "0955-2219",

publisher = "Elsevier BV",

number = "14",

}

TY - JOUR

T1 - Electron-energy loss spectroscopy and Raman studies of nanosized chromium carbide synthesized during carbothermal reduction process from precursor Cr(CO)6

AU - Lin, Hao Tung

AU - Nayak, Pramoda K.

AU - Wang, Sheng Chang

AU - Chang, Shin Yun

AU - Huang, Jow Lay

N1 - Funding Information: Authors are thankful to National Science Council of Taiwan for its financial support under the contract No: 99-2923-E-006-002-MY3.

PY - 2011/11

Y1 - 2011/11

N2 - Nanosized chromium carbide has been prepared by metal-organic chemical vapour deposition (MOCVD) method in a fluidized bed and carburized in the mixture of CH4/H2 atmosphere in temperature range 700-850°C. The carburization process involves carbon deposition on the outer surface of the Cr2O3 powder, followed by carbon diffusion into the powder, leading to formation of metastable Cr3C2-x phase and stable Cr3C2. The phase transformation from Cr2O3 to Cr3C2 via an intermediate state Cr3C2-x has been identified using electron-energy loss spectroscopy (EELS) and micro-Raman spectroscopy. We could hypothesize that the formation of carbon nanofilms surrounding the carbide crystallites provides the stress and assist the phase transformation from metastable Cr3C2-x to stable Cr3C2.

AB - Nanosized chromium carbide has been prepared by metal-organic chemical vapour deposition (MOCVD) method in a fluidized bed and carburized in the mixture of CH4/H2 atmosphere in temperature range 700-850°C. The carburization process involves carbon deposition on the outer surface of the Cr2O3 powder, followed by carbon diffusion into the powder, leading to formation of metastable Cr3C2-x phase and stable Cr3C2. The phase transformation from Cr2O3 to Cr3C2 via an intermediate state Cr3C2-x has been identified using electron-energy loss spectroscopy (EELS) and micro-Raman spectroscopy. We could hypothesize that the formation of carbon nanofilms surrounding the carbide crystallites provides the stress and assist the phase transformation from metastable Cr3C2-x to stable Cr3C2.

UR - https://www.scopus.com/pages/publications/80051471464

UR - https://www.scopus.com/pages/publications/80051471464#tab=citedBy

U2 - 10.1016/j.jeurceramsoc.2010.12.005

DO - 10.1016/j.jeurceramsoc.2010.12.005

M3 - Article

AN - SCOPUS:80051471464

SN - 0955-2219

VL - 31

SP - 2481

EP - 2487

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 14

ER -

Electron-energy loss spectroscopy and Raman studies of nanosized chromium carbide synthesized during carbothermal reduction process from precursor Cr(CO)6

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