Hostname: page-component-586b7cd67f-dsjbd Total loading time: 0 Render date: 2024-11-26T03:54:08.902Z Has data issue: false hasContentIssue false
  • English
  • Français

Improved tensile creep properties of yttrium- and lanthanum-doped alumina: a solid solution effect

Published online by Cambridge University Press:  31 January 2011

Junghyun Cho ,
Chong Min Wang ,
Helen M. Chan ,
J. M. Rickman  and
Martin P. Harmer
Junghyun Cho
Affiliation:
Materials Research Center and Department of Materials Science and Engineering, 5 E. Packer Avenue, Lehigh University, Bethlehem, Pennsylvania 18015
Chong Min Wang
Affiliation:
Materials Research Center and Department of Materials Science and Engineering, 5 E. Packer Avenue, Lehigh University, Bethlehem, Pennsylvania 18015
Helen M. Chan
Affiliation:
Materials Research Center and Department of Materials Science and Engineering, 5 E. Packer Avenue, Lehigh University, Bethlehem, Pennsylvania 18015
J. M. Rickman
Affiliation:
Materials Research Center and Department of Materials Science and Engineering, 5 E. Packer Avenue, Lehigh University, Bethlehem, Pennsylvania 18015
Martin P. Harmer
Affiliation:
Materials Research Center and Department of Materials Science and Engineering, 5 E. Packer Avenue, Lehigh University, Bethlehem, Pennsylvania 18015
Get access

Abstract

The tensile creep behavior of yttrium- and lanthanum-doped alumina (at dopant levels below the solubility limit) was examined. Both compositions (100 ppm yttrium, 100 ppm lanthanum) exhibited a uniform microstructure consisting of fine, equiaxed grains. The creep resistance of both doped aluminas was enhanced, compared with undoped alumina, by about two orders of magnitude, which was almost the same degree of improvement as for materials with higher dopant levels (in excess of the solubility limit). In addition, measured creep rupture curves exhibited predominantly steady-state creep behavior. Our results, therefore, verified that the creep improvement in these rare-earth doped aluminas was primarily a solid-solution effect.

Type
Articles
Information
Journal of Materials Research , Volume 16 , Issue 2 , February 2001 , pp. 425 - 429
Copyright
Copyright © Materials Research Society 2001

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

REFERENCES

1.Courtright, E.L., Ceram. Eng. Sci. Proc. 12, 1725 (1991).CrossRefGoogle Scholar
2.Tallan, N.M., Ceram. Eng. Sci. Proc. 12, 957 (1991).CrossRefGoogle Scholar
3.Cho, J., Harmer, M.P., Chan, H.M., Richman, J.M., and Thompson, A.M., J. Am. Ceram. Soc. 80, 1013 (1997).CrossRefGoogle Scholar
4.French, J.D., Zhao, J., Harmer, M.P., Chan, H.M., and Miller, G.A., J. Am. Ceram. Soc. 77, 2857 (1994).CrossRefGoogle Scholar
5.Li, Y-Z., Wang, C., Chan, H.M., Rickman, J.M., and Harmer, M.P., J. Am. Ceram. Soc. 82, 1497 (1999).CrossRefGoogle Scholar
6.Yoshida, H., Ikuhara, Y., and Sakuma, T., J. Mater. Res. 13, 2597 (1998).CrossRefGoogle Scholar
7.Wakai, F., Nagano, T., and Iga, T., J. Am. Ceram. Soc. 80, 2361 (1997).CrossRefGoogle Scholar
8.Li, C-W. and Kingery, W.D., in Advances in Ceramics, Structure and Properties of MgO and Al2O3 Ceramics, edited by Kingery, W.D. (American Ceramic Society, Columbus, OH, 1984), Vol. 10, pp. 368–378.Google Scholar
9.Thompson, A.M., Soni, K.K., Chan, H.M., Harmer, M.P., Williams, D.B., Chabala, J.M., and Levi-Setti, R., J. Am. Ceram. Soc. 80, 373 (1997).CrossRefGoogle Scholar
10.Bruley, J., Cho, J., Fang, J.C., Thompson, A.M., Li, Y.Z., Chan, H.M., and Harmer, M.P., J. Am. Ceram. Soc. 82, 2865 (1999).CrossRefGoogle Scholar
11.French, J.D. and Wiederhorn, S.M., J. Am. Ceram. Soc. 79, 550 (1996).CrossRefGoogle Scholar
12.Carroll, D.F., Wiederhorn, S.M., and Roberts, D.E., J. Am. Ceram. Soc. 72, 1610 (1989).CrossRefGoogle Scholar
13.Cho, J., Ph.D. Thesis, Lehigh University, Bethlehem, PA (1998).Google Scholar
14.Fang, J., Thompson, A.M., Harmer, M.P., and Chan, H.M., J.Am. Ceram. Soc. 80, 2005 (1997).CrossRefGoogle Scholar
15.Wang, C.M., Cargill, G.S. III. Harmer, M.P., Chan, H.M., and Cho, J., Acta Mater 47, 3411 (1999).CrossRefGoogle Scholar
16.Cannon, R.M. and Coble, R.L., in Deformation of Ceramic Materials, Proceedings of a Symposium on Plastic Deformation of Ceramic Materials (Pennsylvania State University, July 1974), edited by Bradt, R.C. and Tressler, R.E. (Plenum Press, New York, 1975).Google Scholar
17.Langdon, T.G., Philos. Mag. 22, 689 (1970).CrossRefGoogle Scholar
18.Ashby, M.F. and Verrall, R.A., Acta Metall. 21, 149 (1973).CrossRefGoogle Scholar
19.Sherby, O.D. and Wadsworth, J., in Deformation, Processing, and Microstructure, Proceedings of the ASM Materials Science Seminar (St. Louis, MO, Oct. 1983), edited by Krauss, G. (American Society for Metals, Metals Park, OH, 1984).Google Scholar
20.Sherby, O.D. and Wadsworth, J., Prog. Mater. Sci., 33, 169 (1989).CrossRefGoogle Scholar
21.Robertson, A.G., Wilkinson, D.S., and Caceres, Carlos H., J. Am. Ceram. Soc., 74, 915 (1991).CrossRefGoogle Scholar
22.Sutton, A.P. and Balluffi, R.W., Interfaces in Crystalline Materials, (Clarenton Press, Oxford, 1995), p 477.Google Scholar
23.Ching, W.Y. and Xu, Y.N., Phys. Rev. B, 59, 12815 (1999).CrossRefGoogle Scholar
24.Yoshida, H., Ikuhara, Y., and Sakuma, T., J. Mater. Res., 13, 2597 (1998).CrossRefGoogle Scholar