Improving the toughness of refractory compounds. Final report
Description
Composition and processing studies were conducted on silicon nitride and silicon carbide materials. Charpy mode impact testing to 2415 F established the effectiveness of higher purity silicon nitride powder sources in reducing the scatter of measurements and in improving short time bend strengths as well as bend stress rupture properties. Stabilized zirconia additions in particular were observed to dramatically enhance low and high temperature bend strengths and stress rupture properties for all grades of silicon nitride powder. Silicon carbide samples showed relatively poor impact resistance, although the maxima in stress rupture behavior was exhibited by this material. (Author)
Availability note (English)
MF available from INIS under the Report Number.
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Additional details
Publishing Information
- Imprint Pagination
- 62 p.
- Report number
- N--76-20230
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 8298644
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- MECHANICAL PROPERTIES; SILICON CARBIDES; SILICON NITRIDES; ZIRCONIUM OXIDES
- Descriptors DEC
- CARBIDES; CARBON COMPOUNDS; CHALCOGENIDES; NITRIDES; NITROGEN COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; SILICON COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; ZIRCONIUM COMPOUNDS
Optional Information
- Notes
- Available from NTIS. $4.50.
- Secondary number(s)
- NASA-CR--134813.