Investigation of hot-pressed Al2O3-Cr 2O3/Cr3C2 nanocomposite

Hao Tung Lin, Jow-Lay Huang, Sheng Chang Wang

Research output: Contribution to journalArticle

Abstract

Nanoscaled Cr2O3 powders coated on alumina particles have been produced by means of metal organic chemical vapor deposition (MOCVD) in a fluidized bed, using the pyrolysis of Cr(CO)6 precursor. In order to prepare the nanoscaled Cr3C2 powder from the Cr2O3, carbonizing behavior of the Cr2O3 particles was investigated. The carbon is from the decomposition of Cr(CO)6. It was found that Cr2O3 transformed into Cr3C2 at 1150 oC in graphite furnace in a vacuum level of 10-4 torr, while it could not carbonize at 1150oC in a vacuum level of 100 torr. In the present study, two reactions for Cr2O3 are carried out. One is that Cr2O3 reacts with A12O3 to form a solid solution; the other is that Cr2O3 reacts with carbon to transform into chromium carbide. Consequently, a nanocomposite comprising the matrix of solid solution of A12O3 - Cr2O3 and second phase Cr3C2 was prepared after hot-pressed.

Original languageEnglish
Pages (from-to)93-97
Number of pages5
JournalKey Engineering Materials
Volume351
DOIs
Publication statusPublished - 2007 Aug 27

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Carbon Monoxide
Powders
Solid solutions
Nanocomposites
Carbon
Vacuum
Organic Chemicals
Graphite
Aluminum Oxide
Organic chemicals
Chromium
Fluidized beds
Carbides
Chemical vapor deposition
Furnaces
Pyrolysis
Alumina
Metals
Decomposition

All Science Journal Classification (ASJC) codes

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

Cite this

Lin, Hao Tung ; Huang, Jow-Lay ; Wang, Sheng Chang. / Investigation of hot-pressed Al2O3-Cr 2O3/Cr3C2 nanocomposite. In: Key Engineering Materials. 2007 ; Vol. 351. pp. 93-97.
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Investigation of hot-pressed Al2O3-Cr 2O3/Cr3C2 nanocomposite. / Lin, Hao Tung; Huang, Jow-Lay; Wang, Sheng Chang.

In: Key Engineering Materials, Vol. 351, 27.08.2007, p. 93-97.

Research output: Contribution to journalArticle

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AB - Nanoscaled Cr2O3 powders coated on alumina particles have been produced by means of metal organic chemical vapor deposition (MOCVD) in a fluidized bed, using the pyrolysis of Cr(CO)6 precursor. In order to prepare the nanoscaled Cr3C2 powder from the Cr2O3, carbonizing behavior of the Cr2O3 particles was investigated. The carbon is from the decomposition of Cr(CO)6. It was found that Cr2O3 transformed into Cr3C2 at 1150 oC in graphite furnace in a vacuum level of 10-4 torr, while it could not carbonize at 1150oC in a vacuum level of 100 torr. In the present study, two reactions for Cr2O3 are carried out. One is that Cr2O3 reacts with A12O3 to form a solid solution; the other is that Cr2O3 reacts with carbon to transform into chromium carbide. Consequently, a nanocomposite comprising the matrix of solid solution of A12O3 - Cr2O3 and second phase Cr3C2 was prepared after hot-pressed.

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