Hostname: page-component-7479d7b7d-m9pkr Total loading time: 0 Render date: 2024-07-13T22:59:26.637Z Has data issue: false hasContentIssue false

Improved creep resistance in anisotropic silicon nitride

Published online by Cambridge University Press:  31 January 2011

Naoki Kondo*
Affiliation:
National Industrial Research Institute of Nagoya, Shimo-shidami 2268–1, Moriyama-ku, Nagoya, 463–8687 Japan
Yoshikazu Suzuki
Affiliation:
National Industrial Research Institute of Nagoya, Shimo-shidami 2268–1, Moriyama-ku, Nagoya, 463–8687 Japan
Manuel E. Brito
Affiliation:
National Industrial Research Institute of Nagoya, Shimo-shidami 2268–1, Moriyama-ku, Nagoya, 463–8687 Japan
Tatsuki Ohji
Affiliation:
National Industrial Research Institute of Nagoya, Shimo-shidami 2268–1, Moriyama-ku, Nagoya, 463–8687 Japan
*
a)Address all correspondence to this author.naoki-kondo@aist.go.jp
Get access

Abstract

Tensile creep behavior of silicon nitride with aligned rodlike grains (anisotropic silicon nitride), fabricated by superplastic forging, was investigated at elevated temperatures. Creep rate of the anisotropic silicon nitride was about 1 order of magnitude lower than that of the isotropic one (without forging). The stress sensitivities for the isotropic and anisotropic specimens at 1200 °C were 2.1 and 2.6, respectively, and that for the anisotropic specimen at 1250 °C was 3.6. The grain alignment should cause a remarkable improvement in the creep resistance when a tensile stress is applied along the alignment direction.

Type
Rapid Communications
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

1Wiederhorn, S.M., Hockey, B.J., and French, J.D., Eur, J.. Ceram. Soc. 19, 2273 (1999).CrossRefGoogle Scholar
2Wiederhorn, S.M., Z. Metallkd. 90, 1053 (1999).Google Scholar
3Wilkinson, D.S., J. Am. Ceram. Soc. 81, 275 (1998).CrossRefGoogle Scholar
4Hirao, K., Ohashi, M., Brito, M.E., and Kanzaki, S., J. Am. Ceram. Soc. 78, 1687 (1995).CrossRefGoogle Scholar
5Kondo, N., Ohji, T., and Wakai, F., J. Am. Ceram. Soc. 81, 713 (1998).CrossRefGoogle Scholar
6Kondo, N., Suzuki, Y., and Ohji, T., J. Am. Ceram. Soc. 82, 1067 (1999).CrossRefGoogle Scholar
7Ohji, T., Hirao, K., and Kanzaki, S., J. Am. Ceram. Soc. 78, 3125 (1995).CrossRefGoogle Scholar
8Lin, H.T., Sun, E.Y., Becher, P.F., Waters, S.H., Plucknett, K.P., Hirao, K., and Brito, M.E., American Ceramic Society 1998 Annual Meeting Abstract Book (American Ceramic Society, Westerville, Ohio, 1998).Google Scholar
9Yoon, S.Y., Akatsu, T., and Yasuda, E., J. Mater. Sci. 32, 3813 (1997).CrossRefGoogle Scholar
10Kondo, N., Sato, E., and Wakai, F., J. Am. Ceram. Soc. 81, 3221 (1998).CrossRefGoogle Scholar
11Kondo, N., Inagaki, Y., Suzuki, Y., and Ohji, T., J. Am. Ceram. Soc. (in press).Google Scholar
12Ohji, T. and Yamauchi, Y., J. Am. Ceram. Soc. 75, 2304 (1992).CrossRefGoogle Scholar
13Wiederhorn, S.M., Hockey, B.J., Kranmer, D.C., and Yeckley, R., J. Mater. Sci. 28, 445 (1993).CrossRefGoogle Scholar
14Ohji, T. and Yamauchi, Y., J. Am. Ceram. Soc. 76, 3105 (1993).CrossRefGoogle Scholar
15Yoon, K.J., Wiederhorn, S.M., and Luecke, W.E., J. Am. Ceram. Soc. 83, 2017 (2000).CrossRefGoogle Scholar
16Luecke, W.E., Wiederhorn, S.M., Hockey, B.J., Krause, R.E. Jr., and Long, G.G., J. Am. Ceram. Soc. 78, 2085 (1995).CrossRefGoogle Scholar
17Zhan, G-D., Mitomo, M., Ikuhara, Y., and Sakuma, T., J. Mater. Res. 15, 1551 (2000).CrossRefGoogle Scholar
18Lin, H.T. (private communication).Google Scholar