Details

Autor(en) / Beteiligte

• Kondo, Naoki
• Asayama, Masahiro
• Suzuki, Yoshikazu
• Ohji, Tatsuki
• WCA

Titel

High-Temperature Strength of Sinter-Forged Silicon Nitride with Lutetia Additive

Ist Teil von

• Journal of the American Ceramic Society, 2003-08, Vol.86 (8), p.1430-1432

Ort / Verlag

Westerville, Ohio: American Ceramics Society

Erscheinungsjahr

2003

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• A sinter‐forging technique was successfully applied to fabricate a silicon nitride with a lutetia (Lu2O3) additive. The sinter‐forged specimen had a strongly anisotropic microstructure where rodlike silicon nitride grains preferentially aligned perpendicular to the forging direction. The specimen exhibited superior strength of ∼700 MPa at 1500°C. This strength was highest when compared with previous silicon nitrides at temperatures >1400°C. Such superior high‐temperature strength was attributed to grain alignment as well as to the refractory grain‐boundary glassy phase and the existence of glass‐free grain boundaries.