Chapter 54. Characterization of Mechanical Performance of NT154 Silicon Nitride Mtcrotrubine Rotors

  1. Rajan Tandon,
  2. Andrew Wereszczak and
  3. Edgar Lara-Curzio
  1. H.-T. Lin,
  2. M. K. Ferber,
  3. S. B. Waters and
  4. T. P. Kirkland

Published Online: 27 MAR 2008

DOI: 10.1002/9780470291313.ch54

Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 2

Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 2

How to Cite

Lin, H.-T., Ferber, M. K., Waters, S. B. and Kirkland, T. P. (2008) Characterization of Mechanical Performance of NT154 Silicon Nitride Mtcrotrubine Rotors, in Mechanical Properties and Performance of Engineering Ceramics II: Ceramic Engineering and Science Proceedings, Volume 27, Issue 2 (eds R. Tandon, A. Wereszczak and E. Lara-Curzio), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291313.ch54

Author Information

  1. Material Science and Technology Division Oak Ridge National Laboratory Oak Ridge, TN 37831–6068

Publication History

  1. Published Online: 27 MAR 2008
  2. Published Print: 1 JAN 2006

ISBN Information

Print ISBN: 9780470080528

Online ISBN: 9780470291313

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Keywords:

  • nitride;
  • microturbine;
  • airfoils;
  • department of energy (DOE);
  • university of dayton research institute (UDRI)

Summary

This paper summarizes the results on recent component characterization efforts carried out to verify the mechanical reliability of NT 154 silicon nitride microturbine rotors manufactured by Saint–Gobain. Mechanical properties of biaxial discs machined from airfoil as well as hub region of microturbine rotors were evaluated by a ball–on–ring test technique. Results showed that the mechanical properties of specimens from airfoils with as–processed surfaces exhibited lower characteristic strength than those machined from the hub region with as–machined surfaces. The differences in mechanical performance and reliability between as–processed components and simple–shaped test coupons appear to arise mainly from differences in strength limiting flaw type and microstructure verified by detailed electron microscopy analysis.