Characterization of Mechanical Reliability of Silicon Nitride Microturbine Rotors

Hua Tay Lin; Mattison K. Ferber

doi:10.4028/www.scientific.net/KEM.287.393

Paper Titles

Highly Porous Silica Nanoaerogels for Ultrafast Nonlinear Optical Applications
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Toughening of Ceramic Composite Designed by Silica-Based Transformation Weakening Interphases
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Environmental Characterization of Monolithic Ceramics for Gas Turbine Applications
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Creep Behavior of Improved High Temperature Silicon Nitride
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Characterization of Mechanical Reliability of Silicon Nitride Microturbine Rotors
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The Effects of β-Si₃N₄ Whisker Content and Orientation on R-Curve Behaviors of Si₃N₄ Ceramics
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Static and Dynamic Indentation Damage in SiC and Si₃N₄
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Erosion Behavior of Silicon Nitride with Graded Microstructure
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Effect of Grain Boundary Phase on Contact Damage Resistance of Silicon Nitride Ceramics
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HomeKey Engineering MaterialsKey Engineering Materials Vol. 287Characterization of Mechanical Reliability of...

Characterization of Mechanical Reliability of Silicon Nitride Microturbine Rotors

Abstract:

This paper summarizes the recent results on component characterization efforts carried out to verify the mechanical reliability of SN237 and SN281 silicon nitride microturbine rotors manufactured by Kyocera. Mechanical properties of biaxial discs machined from airfoils of microturbine rotors were evaluated by a ball-on-ring test technique. Results showed that the mechanical properties of samples 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 asprocessed components and simple-shaped test coupons appear to arise mainly from differences in strength limiting flaw type and population.