Investigation of chromium carbide/alumina nano-composite prepared via MOCVD in fluidized bed and densification process

Hao Tung Lin; Wei Sheng Huang; Sheng Chang Wang; Horng Hwa Lu; Wen Cheng J. Wei; Jow Lay Huang

doi:10.1016/j.mseb.2005.09.006

Investigation of chromium carbide/alumina nano-composite prepared via MOCVD in fluidized bed and densification process

Hao Tung Lin, Wei Sheng Huang, Sheng Chang Wang, Horng Hwa Lu, Wen Cheng J. Wei, Jow Lay Huang

Department of Materials Science and Engineering

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

5 Citations (Scopus)

Abstract

Nano-sized Cr-species particles with a size about 20-40 nm, uniformly coated on alumina particles, has been prepared by metal organic chemical vapor deposition (MOCVD) in the fluidized chamber, using the pyrolysis of Cr(CO) ₆ precursor. The Carbothermal reactions of Cr-species in an Ar atmosphere in a graphite furnace at 1250 °C for 2 h and the microstructure of high pressure sintering specimen are reported. The crystalline phase of the powder deposited in fluidized bed was characterized by an X-ray diffractometer, and transmission electron microscopy. The analysis indicates that the deposited powders were metastable CrC_1-x and Cr₂O₃. These Cr-species were transferred into stable chromium carbide (Cr ₃C₂ and Cr₇C₃) after the thermal treatment as well as high pressure sintering. Microstructure of sintering specimen shows that the cluster of coating nano-particles were formed in the fluidized bed which coarsen during densification and generally located on the grain boundary to inhibit the alumina grain growth. Further, the independent coating nano-particle was also incorporated into the alumina grains.

Original language	English
Pages (from-to)	22-28
Number of pages	7
Journal	Materials Science and Engineering: B
Volume	127
Issue number	1
DOIs	https://doi.org/10.1016/j.mseb.2005.09.006
Publication status	Published - 2006 Feb 15

All Science Journal Classification (ASJC) codes

General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1016/j.mseb.2005.09.006

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@article{f02fdd87a34446cd8adc648ff5898f5b,

title = "Investigation of chromium carbide/alumina nano-composite prepared via MOCVD in fluidized bed and densification process",

abstract = "Nano-sized Cr-species particles with a size about 20-40 nm, uniformly coated on alumina particles, has been prepared by metal organic chemical vapor deposition (MOCVD) in the fluidized chamber, using the pyrolysis of Cr(CO) 6 precursor. The Carbothermal reactions of Cr-species in an Ar atmosphere in a graphite furnace at 1250 °C for 2 h and the microstructure of high pressure sintering specimen are reported. The crystalline phase of the powder deposited in fluidized bed was characterized by an X-ray diffractometer, and transmission electron microscopy. The analysis indicates that the deposited powders were metastable CrC1-x and Cr2O3. These Cr-species were transferred into stable chromium carbide (Cr 3C2 and Cr7C3) after the thermal treatment as well as high pressure sintering. Microstructure of sintering specimen shows that the cluster of coating nano-particles were formed in the fluidized bed which coarsen during densification and generally located on the grain boundary to inhibit the alumina grain growth. Further, the independent coating nano-particle was also incorporated into the alumina grains.",

author = "Lin, {Hao Tung} and Huang, {Wei Sheng} and Wang, {Sheng Chang} and Lu, {Horng Hwa} and Wei, {Wen Cheng J.} and Huang, {Jow Lay}",

note = "Funding Information: The authors would like to thank the National Science Council of the Republic of China for its financial support under the Contract No. NSC-92-2216-E-006-011.",

year = "2006",

month = feb,

day = "15",

doi = "10.1016/j.mseb.2005.09.006",

language = "English",

volume = "127",

pages = "22--28",

journal = "Materials Science and Engineering: B",

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TY - JOUR

T1 - Investigation of chromium carbide/alumina nano-composite prepared via MOCVD in fluidized bed and densification process

AU - Lin, Hao Tung

AU - Huang, Wei Sheng

AU - Wang, Sheng Chang

AU - Lu, Horng Hwa

AU - Wei, Wen Cheng J.

AU - Huang, Jow Lay

N1 - Funding Information: The authors would like to thank the National Science Council of the Republic of China for its financial support under the Contract No. NSC-92-2216-E-006-011.

PY - 2006/2/15

Y1 - 2006/2/15

N2 - Nano-sized Cr-species particles with a size about 20-40 nm, uniformly coated on alumina particles, has been prepared by metal organic chemical vapor deposition (MOCVD) in the fluidized chamber, using the pyrolysis of Cr(CO) 6 precursor. The Carbothermal reactions of Cr-species in an Ar atmosphere in a graphite furnace at 1250 °C for 2 h and the microstructure of high pressure sintering specimen are reported. The crystalline phase of the powder deposited in fluidized bed was characterized by an X-ray diffractometer, and transmission electron microscopy. The analysis indicates that the deposited powders were metastable CrC1-x and Cr2O3. These Cr-species were transferred into stable chromium carbide (Cr 3C2 and Cr7C3) after the thermal treatment as well as high pressure sintering. Microstructure of sintering specimen shows that the cluster of coating nano-particles were formed in the fluidized bed which coarsen during densification and generally located on the grain boundary to inhibit the alumina grain growth. Further, the independent coating nano-particle was also incorporated into the alumina grains.

AB - Nano-sized Cr-species particles with a size about 20-40 nm, uniformly coated on alumina particles, has been prepared by metal organic chemical vapor deposition (MOCVD) in the fluidized chamber, using the pyrolysis of Cr(CO) 6 precursor. The Carbothermal reactions of Cr-species in an Ar atmosphere in a graphite furnace at 1250 °C for 2 h and the microstructure of high pressure sintering specimen are reported. The crystalline phase of the powder deposited in fluidized bed was characterized by an X-ray diffractometer, and transmission electron microscopy. The analysis indicates that the deposited powders were metastable CrC1-x and Cr2O3. These Cr-species were transferred into stable chromium carbide (Cr 3C2 and Cr7C3) after the thermal treatment as well as high pressure sintering. Microstructure of sintering specimen shows that the cluster of coating nano-particles were formed in the fluidized bed which coarsen during densification and generally located on the grain boundary to inhibit the alumina grain growth. Further, the independent coating nano-particle was also incorporated into the alumina grains.

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Investigation of chromium carbide/alumina nano-composite prepared via MOCVD in fluidized bed and densification process

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