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Second Phases and Impurity Segregations in MgO- and NiO-CO-Doped Alumina

Published online by Cambridge University Press:  21 February 2011

K. Park ,
C. Sung  and
T. Vasilos
K. Park
Affiliation:
Center for Advanced Materials, University of Massachusetts, Lowell, MA 01854
C. Sung
Affiliation:
Center for Advanced Materials, University of Massachusetts, Lowell, MA 01854
T. Vasilos
Affiliation:
Department of Chemical Engineering, University of Massachusetts, Lowell, MA 01854
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Abstract

The microstructural and chemical characteristics of the segregated particles, Ni-(Mg)-Al spinel phases, and K-ß’’’ alumina precipitates in fine-grained alumina co-doped with 0.15 wt % of MgO and 0.10 wt % of NiO were studied using analytical transmission electron microscopy. The segregated Ni particles and second phases were generally found at triple junctions or on grain boundaries. The K-ß’’’ alumina precipitates were found to contain occasionally a high density of stacking faults. These microstructural observations point out the location of the dopants and impurities during the sintering process.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 319: Symposia CB – Defect-Interface Interactions , 1993 , 75
Copyright
Copyright © Materials Research Society 1994

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References

[1]. Coble, R. L., J. Appl. Phys. 32, 793 (1961).Google Scholar
[2]. Haroun, N. A. and Budworth, D. W., Trans. Br. Ceram. Soc. 69,73 (1970).Google Scholar
[3]. Prendergast, I. D., Budworth, D. W., and Brett, N. H., Trans. Br. Ceram. Soc. 71, 31 (1972).Google Scholar
[4]. Johnson, W. C. and Stein, D. F., J. Am. Ceram. Soc. 58,485 (1975).CrossRefGoogle Scholar
[5]. Bennison, S. J. and Harmer, M. P., J. Am. Ceram. Soc. 66, C–90 (1983).Google Scholar
[6]. Jorgensen, P. J. and Westbrook, J. H., J. Am. Ceram. Soc. 47, 332 (1964).Google Scholar
[7]. Zhao, J. and Harmer, M. P., J. Am. Ceram. Soc. 70,860 (1987).Google Scholar
[8]. Wartenberg, H. von and Prophet, E., Anorg, Z.. Allg. Chem. 208, 369 (1932).Google Scholar
[9]. Ando, K., Momoda, M., Azumi, T., and Kitajima, S., J. Am. Ceram. Soc. 70, C–309 (1987).Google Scholar
[10]. Shannon, R. D. and Prewitt, C. T., Acta Crystallogra. B 25, 925 (1969).CrossRefGoogle Scholar
[11]. Cooley, R. F. and Reed, J. S., J. Am. Ceram. Soc. 55, 395 (1972).Google Scholar
[12]. Blanc, M., Mocellin, A., and Strudel, J. L., J. Am. Ceram. Soc. 60, 403 (1977).CrossRefGoogle Scholar