Evaluation of Silicon Nitride for Brayton Turbine Wheel Application (Paperback) (ISBN-13: 9781289227029)

Silicon nitride (Si3N4) is being evaluated as a risk-reduction alternative for a Jupiter Icy Moons Orbiter Brayton turbine wheel in the event that the Prometheus program design requirements exceed the creep strength of the baseline metallic superalloys. Five Si3N4 ceramics, each processed by a different method, were screened based on the Weibull distribution of bend strength at 1700 F (927 C). Three of the Si3N4 ceramics, Honeywell AS800, Kyocera SN282, and Saint-Gobain NT154, had bend strengths in excess of 87 ksi (600 MPa) at 1700 F (927 C). These were chosen for further assessment and consideration for future subcomponent and component fabrication and testing.

Author: Nasa Technical Reports Server (Ntrs),Marc R. Freedman
ISBN-10: 1289227020
ISBN-13: 9781289227029
Publisher: Bibliogov
Language: English
Published: 07/22/2013
Pages: 22
Format: Paperback
Weight: 0.13lbs
Size: 9.69h x 7.44w x 0.05d