Mechanical properties of silicon nitride-silicon nitride joints. [Glass-filled, sintered silicon nitride joints]

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6910914

Neilson, Jr, R M; Coon, D N

Oxynitride glasses in the Y--Si--Al--O--N system were used to join sintered and hot pressed silicon nitrides. Joint flexural strengths were dependent upon the joining temperature, joining glass composition, silicon nitride type, and joint morphology. Joint flexural strengths comparable to that of as-received silicon nitride were observed to test temperatures as high as 1100/degree/C, and were dependent upon joint morphology. Non-brittle behavior was observed in /open quotes/fast fracture/close quotes/ of glass-filled joints at temperatures of 1025/degree/C. However, slow crack growth was observed in the temperature range of 900 to 1025/degrees/C. Slow crack growth was found to be strongly temperature dependent /endash/ long joint lifetimes occur below 900/degree/C. Initial experiments indicated that thermal cycling did not degrade the flexural strength of glass-filled joints. 10 refs., 6 figs.

• Research Organization: EG and G Idaho, Inc., Idaho Falls (USA)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 6910914
• Report Number(s): EGG-M-31987; CONF-880504-7; ON: DE88015095
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360201* -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
CREEP
DATA
EXPERIMENTAL DATA
FABRICATION
FLEXURAL STRENGTH
GLASS
HOT PRESSING
INFORMATION
JOINING
JOINTS
MATERIALS WORKING
MECHANICAL PROPERTIES
NITRIDES
NITROGEN COMPOUNDS
NUMERICAL DATA
PNICTIDES
PRESSING
SILICON COMPOUNDS
SILICON NITRIDES
SINTERING
VERY HIGH TEMPERATURE