Hostname: page-component-cd9895bd7-dzt6s Total loading time: 0 Render date: 2024-12-28T16:10:22.116Z Has data issue: false hasContentIssue false
  • English
  • Français

Diffusion bonding of nickel and zirconia: Mechanical properties and interfacial microstructures

Published online by Cambridge University Press:  31 January 2011

C-D. Qin  and
B. Derby
C-D. Qin*
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
B. Derby
Affiliation:
Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, United Kingdom
*
a)Current address: Department of Engineering, National University of Singapore, Singapore.
Get access

Abstract

Diffusion bonds of Ni/ZrO2 and Ni/NiO/ZrO2 fabricated in vacuum have been investigated using flexural 4-point bending tests and optical and electron microscopy. It is found that subsequent annealing in air after bonding improves bond strength, and annealing in vacuum reduces strength. This is attributed to the formation of a thin oxide layer during annealing in air which enhances adhesion to the ceramic, whereas annealing in vacuum creates debonding voids at the specimen edges. The transformation of NiO in vacuum to Ni explains why the strength of bonds using preoxidized Ni foil does not show any increase, as it is essentially still the diffusion bonding of Ni to ZrO2 in the configuration of Ni/NiO/Ni/ZrO2. The presence of extensive void necklaces on grain boundaries in the metal where they intersect the bonding interface shows the importance of the metal grain boundaries acting as vacancy sinks during diffusion bonding.

Type
Articles
Information
Journal of Materials Research , Volume 7 , Issue 6 , June 1992 , pp. 1480 - 1488
Copyright
Copyright © Materials Research Society 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1.Nicholas, M. G. and Lee, R. J., Mater. Sci. Technol. 5, 348 (1989).Google Scholar
2.Yamane, T., Minamino, Y., Hirao, K., and Ohnishi, H., J. Mater. Sci. 21, 4227 (1986).Google Scholar
3.Duh, J. G. and Chien, W. S., J. Mater. Sci. 25, 1529 (1990).Google Scholar
4.Qin, C. D. and Derby, B., in Diffusion Bonding 2, edited by Stephenson, D. J., Proc. of the 2nd Int. Conf. on Diffusion Bonding (Elsevier, 1991), p. 224.Google Scholar
5. CQin, D., James, N. L., and Derby, B., Acta Metall. Mater. 40, 925 (1992).CrossRefGoogle Scholar
6.Stoneham, A. M. and Tasker, P. W., in Ceramic Microstructures '86: Role of Interfaces, edited by Pask, J. A. and Evans, A. G., Mater. Sci. Res. 21, 155, Plenum (1987).CrossRefGoogle Scholar
7.Bergman, B., Lange, N., and Agren, J., Acta Metall. 36, 883 (1988).Google Scholar
8.Ruth, R. and Garrett, H. J., J. Am. Ceram. Soc. 50, 257 (1967).Google Scholar
9.Ackermann, R. J., Garg, S. P., and Rauh, E. G., J. Am. Ceram. Soc. 61, 275 (1978).Google Scholar
10.Cao, H. C., Thouless, M. D., and Evans, A. G., Acta Metall. 36, 2037 (1988).CrossRefGoogle Scholar
11.Hill, A. and Wallach, E. R., Acta Metall. 37, 2425 (1989).Google Scholar
12.Derby, B. and Wallach, E. R., Metal Sci. 16, 49 (1982).CrossRefGoogle Scholar
13.Derby, B. and Wallach, E. R., Metal Sci. 18, 427 (1984).CrossRefGoogle Scholar
14.Derby, B., in Ceramic Microstructures '86: Role of Interfaces, edited by Pask, J. A. and Evans, A. G., Mater. Sci. Res. 21, 319, Plenum (1987).Google Scholar
15.Derby, B., in Metal/Ceramic Interfaces, edited by Ruhle, M., Evans, A. G., Ashby, M. F., and Hirth, J. P., Acta Scripta Metall. Proc. Series 4, 161, Pergamon (1990).Google Scholar
16.Pilling, J., Liversey, D. W., Hawkgard, J. B., and Ridley, N., Metal Sci. 18, 117 (1986).CrossRefGoogle Scholar