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Investigation on Carbonizing Behaviors of Nanometer-sized Cr2O3 Particles Dispersed on Alumina Particles by Metalorganic Chemical Vapor Deposition in Fluidized Bed

Published online by Cambridge University Press:  01 August 2005

Hao-Tung Lin ,
Jow-Lay Huang ,
Wen-Tse Lo  and
Wen-Cheng J. Wei
Hao-Tung Lin
Affiliation:
Department of Materials Science and Engineering, National Cheng-Kung University, Tainan 701, Taiwan, Republic of China
Jow-Lay Huang*
Affiliation:
Department of Materials Science and Engineering, National Cheng-Kung University, Tainan 701, Taiwan, Republic of China
Wen-Tse Lo
Affiliation:
Department of Materials Science and Engineering, National Cheng-Kung University, Tainan 701, Taiwan, Republic of China
Wen-Cheng J. Wei
Affiliation:
Department of Materials Science and Engineering, National Taiwan University, Taipei, Taiwan 106, Republic of China
*
a) Address all correspondence to this author.e-mail: JLH888@mail.ncku.edu.tw
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Abstract

Nanoscaled Cr2O3 powder with an average particle size of 20–40 nm, coated on alumina particles, has been produced by means of chemical vapor deposition (CVD) in a fluidized chamber, using the pyrolysis of Cr(CO)6 precursor. Amorphous and crystalline Cr2O3 particles were obtained when the temperatures of the pyrolysis were 300 and 400 °C, respectively. To prepare nanoscaled Cr3C2 powder from the nanometer-sized Cr2O3, carbonizing behavior of the Cr2O3 particles was investigated. It was found that, when amorphous Cr2O3 powders were carbonized in graphite furnace at 1150 °C for 2 h in vacuum (10−3 Torr), the powder was transformed into Cr3C2, while the crystalline Cr2O3 was transformed into a mixture of Cr7C3 and Cr3C2. The examinations by x-ray diffraction, transmission electron microscopy, and energy dispersive spectroscopy confirmed the transformation of the nano-sized Cr3C2 powders. The results of thermogravimetry and differential thermal analysis indicated that the transformation temperature was ∼1089 °C for amorphous Cr2O3 and ∼1128 °C for crystalline Cr2O3.

Keywords

CarbonizationChemical vapor deposition (CVD)Nanoscale
Type
Articles
Information
Journal of Materials Research , Volume 20 , Issue 8 , August 2005 , pp. 2154 - 2160
Copyright
Copyright © Materials Research Society 2005

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References

REFERENCES

1Wang, Y. and Hsu, S.M.: The effects of operating parameters and environment on the wear and wear transition of alumina. Wear 195, 90 (1996).CrossRefGoogle Scholar
2Ghate, B.B., Smith, W.C., Kim, C.H., Hasselman, D.P.H. and Kane, G.E.: Effect of chromia alloying on machining performance of alumina ceramic cutting tools. 54, 210 (1975).Google Scholar
3Lio, S., Watanabe, M., Matsubara, M. and Matsuo, Y.: Mechanical properties of alumina/silicon carbide whisker composites. J. Am. Ceram. Soc. 72, 1880 (1989).CrossRefGoogle Scholar
4Tseng, W.J. and Funkenbusch, P.D.: Microstructure and densification of pressureless-sintered Al2O3/Si3N4. J. Am. Ceram. Soc. 75, 1171 (1992).CrossRefGoogle Scholar
5Chou, Y.S. and Green, D.J.: Silicon carbide platelet/alumina composites: I. Effect of forming technique on platelet orientation. J. Am. Ceram. Soc. 75, 3346 (1992).Google Scholar
6Fu, C.T., Wu, J.M. and Li, A.K.: Microstructure and mechanical properties of Cr3C2 particulate reinforced Al2O3 matrix composites. J. Mater. Sci. 29, 2671 (1994).CrossRefGoogle Scholar
7Huang, J.L., Lin, Ho-Don, Jeng, Ching-An and Lii, D.F.: Crack growth resistance of Cr3C2/Al2O3 composites. Mater. Sci. Eng. A279, 81 (2000).Google Scholar
8Huang, J.L., Twu, K.C., Lii, D.F. and Li, A.K.: Investigation of Al2O3/Cr3C2 composites prepared by pressureless sintering (part 2). Mater. Chem. Phys. 51, 211 (1997).CrossRefGoogle Scholar
9Lii, D.F., Huang, J.L., Huang, J.H. and J, H.H. Lu: The interfacial reaction in Cr3C2/Al2O3 composites. J. Mater. Res. 14, 817 (1999).Google Scholar
10Niihara, K.: New design concept of structural ceramics-ceramic nanocomposites. J. Ceram. Soc. Jpn 99, 974 (1991).Google Scholar
11Sternitzke, M.: Review: Structural ceramic nanocomposites. J. Eur. Ceram. Soc. 17, 1061 (1997).CrossRefGoogle Scholar
12Anya, C.C.: Microstructural nature of strengthening and toughening in Al2O3–SiC(p) nanocomposites. J. Mater. Sci. 34, 5557 (1999).Google Scholar
13Hench, G.Y. Onada Jr.and L.L.: Ceramic Processing before Firing (Wiley, New York, 1978), pp. 357–376.Google Scholar
14Pugar, E.A. and Morgan, P.E.D.: Coupled grain growth effects in Al2O3/10 vol% ZrO2. J. Am. Ceram. Soc. 69, C120 (1984).Google Scholar
15Zhu, Y., Qian, Y. and Zhang, M.: γ-radiation synthesis of nanometer-size amorphous Cr2O3 powders at room temperature. Mater. Sci. Eng. B 41, 294 (1996).Google Scholar
16Chen, C.L. and Wei, W.C.: Sintering behavior and mechanical properties of nano-sized Cr3C2/Al2O3 composites prepared by MOCVI process. J. Eur. Ceram. Soc. 22, 2883 (2002).Google Scholar
17Wood, B.J., Sanjurjo, A., Tong, G.T. and Swider, S.E.: Coating particles by chemical vapor deposition in fluidized bed reactors. Surf. Coat. Technol. 49, 228 (1991).Google Scholar
18Tsugeki, K., Kato, T., Koyanagi, Y., Kusakabe, K. and Morooka, S.: Electronductivity of sintered bodies of α–Al2O3–TiN composite prepared by CVD reaction in a fluidized bed. J. Mater. Sci. 28, 3168 (1993).CrossRefGoogle Scholar
19Kunii, D. and Levenspiel, O.: Fluidization Engineering (Huntington, NY, 1977), pp. 195–223.Google Scholar
20Lander, J.J. and Germer, L.H.: Plating molybdenum, tungsten, and chromium by thermal decomposition of their carbonyls. Am. Inst. Min. Metal. Eng. Technol 14(6), 1 (1947).Google Scholar
21Wagner, C.D., Riggs, W.M., Davis, L.E. and Moulder, J.F.: Handbook of X-ray Photoelectron Spectroscopy (Perkin-Elmer, Minnesota, MN, 1979), p. 77.Google Scholar
22Bouzy, E., Bauer-Grosse, E. and Caer, G. Le: NaCl and filled Re3B-type structures for two metastable chromium carbides. Philos. Mag. B 68, 619 (1993).Google Scholar
23Schuste, F. and Maury, F.: Influence of organochromium precursor chemistry on the microstructure of MOCVD chromium carbide coatings. Surf. Coat. Technol. 43, 185 (1990).Google Scholar
24Bewilogua, K., Heinitz, H-J., Rau, B. and Schulze, S.: A chromium carbide phase with B1 structure in thin film prepared by ion plating. Thin Solid Films 167, 233 (1988).Google Scholar
25Edmund, K.S.: The Refractory Carbides, Refractory Materials, Vol. 2 (Academic Press, New York and London, 1967), pp. 102–112.Google Scholar
26Chu, W.F. and Rahmel, A.: The conversion of chromium oxide to chromium carbide. Oxid. Met 15, 331 (1981).Google Scholar
27Hernandez, M.T., González, M. and De Pablos, A.: C-diffusion during hot press in Al2O3–Cr2O3 system. Acta Mater. 51, 217 (2003).Google Scholar
28Berger, L-M., Stole, S., Gruner, W. and Wetzig, K.: Investigation of the carbothermal reduction process of chromium oxide by micro- and lab-scale methods. Int. J. Refract. Met. Hard Mat. 19, 109 (2001).CrossRefGoogle Scholar
29Antony, M.P., Vidhya, R., Mathews, C.K. and Raju, U.V. Varada: Studies on the kinetics of the carbothermic reduction of chromium oxide using the evolved gas analysis technique. Thermochim. Acta 262, 145 (1995).Google Scholar