Abstract
ZTA powder with a composition of 85 wt% alumina/15 wt% zirconia was prepared by a gel precipitation method. Sinter forging was performed with this powder to enhance the mechanical properties of ZTA materials. The influence of processing flaws on mechanical properties of sinter forged materials and pressureless sintered materials was investigated. Sinter forging at 40 MPa effectively decreases process flaw sizes resulting in a homogeneous microstructure and improves the grain boundary structure because of large shear applied in this process. Sinter forging resulted in an increase in strength and toughness by a factor of 1.5–2 when compared with pressureless sintered compacts. The fracture energy is enhanced by a factor of two. The predominate mechanism for improvement of mechanical properties of these sinter-forged ZTA materials is grain boundary strengthening.
Similar content being viewed by others
References
N. Claussen, J. Am. Ceram. Soc. 61 (1978) 85.
F. F. Lange, J. Mater. Sci. 17 (1982) 247.
S. R. Witek and E. P. Butler, J. Am. Ceram. Soc. 69 (1986) 523.
M. Rühle, N. Claussen and A. H. Heuer, 69 (1986) 195.
F. F. Lange, 66 (1983) 396.
A. G. Evans, 65 (1982) 127.
J. Wang, M. Rainforth and R. Stevens, Trans. Br. Ceram. Soc. 88 (1989) 1.
A. Krell and P. Blank, J. Eur. Ceram. Soc. 9 (1992) 309.
A. Krell, P. Blank and T. Weiss, J. Mater. Sci. 16 (1981) 3304.
A. J. A. Winnubst, W. F. M. Groot Zevert, G. S. A. M. Theunissen and A. J. Burggraaf, Mater. Sci. Eng. A109 (1989) 215.
K. R. Venkatachari and R. Raj, J. Am. Ceram. Soc. 70 (1987) 514.
F. F. Lange and M. Metcalf, 66 (1983) 398.
A. G. Evans, 65 (1982) 497.
K. R. Venkatachar and R. Raj, 69 (1986) 499.
M. M. R. Boutz, A. J. A. Winnubst and A. J. Burggraaf, 69, accepted (1994) 499.
Y. J. He, A. J. A. Winnubst, H. Verwiej and A. J. Burggraaf, J. Mater. Sci. accepted (1994).
P. Den Exter, A. J. A. Winnubst, T. H. P. Leuwerink and A. J. Burggraaf, J. Am. Ceram. Soc. accepted (1994).
P. Den Exter, PhD thesis, University of Twente, The Netherlands (1991).
R. Raj, J. Am. Ceram. Soc. 65 (1982) C46.
H. Toraya, M. Yoshimura and S. Somiya, 67 (1984) C119.
J. C. Wurst and J. A. Nelson, 55 (1972) 109.
A. G. Evans, in “Advances in Ceramics”, Vol. 12, “Science and Technology of Zirconia II”, edited by N. Claussen, M. Rühle and A. H. Heuer (American Ceramic Society, Columbus, OH, 1984) pp. 193–212.
J. G. P. Binner, R. S. Tovens and S. R. Tan, pp. 428–34.
Saburo Hori, J. Am. Ceram. Soc. 69 (1986) 169.
R. W. Davidge, ‘Mechanical Behaviour of Ceramics” (Cambridge University Press, Cambridge, UK, 1979).
P. F. Becher, J. Am. Ceram. Soc. 64 (1981) 37.
L. A. Simpson, 56 (1973) 7.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
He, Y.J., Winnubst, A.J.A., Verweij, H. et al. Improvement of mechanical properties of zirconia-toughened alumina by sinter forging. JOURNAL OF MATERIALS SCIENCE 29, 5868–5874 (1994). https://doi.org/10.1007/BF00366869
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/BF00366869