Effect of Oxidation on the Densification of Sinterable RBSN (Reaction-Bonded Silicon Nitride).
Abstract
In the present study, reaction-bonded silicon nitride bars that had been fabricated from injection-molded silicon mixed with 6%Y2O3; and 1%Fe2O3 were sintered to high density using N2 gas pressures up to 8.0 MPa and temperatures between 1875 C and 2000 C. The starting SiO2 content of some specimens was increased by oxidation prior to sintering. Densified specimens were tested at temperatures between 700 C and 1200 C in stress rupture for up to 1000 hours under stress (300 MPa). Room temperature modulus of rupture (RT MOR) was determined for surviving stress-rupture specimens and on specimens not subjected to high temperature testing. Fracture surfaces were examined by SEM to define fracture origins.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 01, 1986
- Accession Number
- ADA166402
Entities
People
- George E. Gazza