Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

A covalent micro/nano-composite resistant to high-temperature oxidation

Abstract

ADVANCED ceramic materials that can withstand high temperatures (over 1,500 °C) without degradation or oxidation are needed for applications such as structural parts for motor engines, gas turbines, catalytic heat exchangers and combustion systems1,2. Hard, oxidation-resistant ceramic composites and coatings are also in demand for use on aircraft and spacecraft. Silicon nitride (Si3N4) and silicon nitride/carbide (Si3N4 /SiC) composites are good candidates for such high-temperature applications2,3. Commercial Si3N4 parts can be used in oxidizing environments up to 1,200–1,300 °C (ref. 4), but are oxidized at still higher temperatures. Here we describe the synthesis of a covalent ceramic composite which is resistant to oxidation at temperatures up to 1,600 °C. The composite is formed from an amorphous silicon carbonitride, which crystallizes at high temperature into a composite of α-Si3N4 microcrystals and α-SiC nanocrystals. The oxidation resistance stems from the formation of a passivating surface layer of SiO2 a few micrometres thick.

This is a preview of subscription content

Access options

Buy article

Get time limited or full article access on ReadCube.

$32.00

All prices are NET prices.

References

  1. Raj, R. J. Am. Ceram. Soc. 76, 2147–2174 (1993).

    CAS  Article  Google Scholar 

  2. Komeya, K. & Matsui, M. in Materials Science and Technology Vol. 11 (ed. Swain, M. V.) 517–565 (VCH, Weinheim, 1994).

    Google Scholar 

  3. Niihara, K. J. Ceram. Soc. Jap. 99, 974–982 (1991).

    CAS  Article  Google Scholar 

  4. Hampshire, S. in Materials Science and Technology Vol. 11 (ed. Swain, M. V.) 119–171 (VCH, Weinheim, 1994).

    Google Scholar 

  5. Riedel, R., Passing, G., Schönfelder, H. & Brook, R. J. Nature 355, 714–716 (1992).

    ADS  CAS  Article  Google Scholar 

  6. Friess, M., Bill, J., Aldinger, F., Szabo, D. V. & Riedel, R. in Silicon Nitride 93 (eds Hoffmann, M. J., Becher, P. F. & Petzow, G.) 95–99 (Trans Tech, Aedermannsdorf, 1994).

    Google Scholar 

  7. Nickel, K. G., Hoffmann, M. J., Greil, P. & Petzow, G. Adv. Ceram. Mater. 3, 557–562 (1988).

    CAS  Article  Google Scholar 

  8. Schaeffer, H. A. thesis, Univ. Erlangen-Nürnberg (1980).

  9. Porz, F. & Thümmler, F. J. Mater. Sci. 19, 1283–1295 (1984).

    ADS  CAS  Article  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and Permissions

About this article

Cite this article

Riedel, R., Kleebe, HJ., Schönfelder, H. et al. A covalent micro/nano-composite resistant to high-temperature oxidation. Nature 374, 526–528 (1995). https://doi.org/10.1038/374526a0

Download citation

  • Received:

  • Accepted:

  • Issue Date:

  • DOI: https://doi.org/10.1038/374526a0

Further reading

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

Search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing