Syuthesis of .ALPHA.-Si3N4 powders.

RHEOLOGICAL PROPERTIES OF AQUEOUS SUSPENSIONS OF Si3N4-Si-Al2O3-ZrO2 POWDERS

The forrning process is very important in the production of ceramics because the defects introduced during this manufacturing step will remain in the product even after the sintering process.In this work the rheological properties of aqueous suspensions of Si3N4-Si-A1203-Zr0 2 powders are studied in order to define the appropriate conditions for preparing good slips for the production of high t...

Sintering of Zircon Powders

Bulk Properties of Powders

THE P/M INDUSTRY has grown considerably in the past decade. As a result of this growth, more critical components in the automotive, aircraft, tooling, and industrial equipment industries are being considered for manufacture using this technology: This is placing increasingly stringent quality requirements on the final P/M part. Variations in part density, mechanical properties including strengt...

Preparation and properties of clean Si3N4 surfaces

In situ chemical methods for preparing atomically-clean surfaces of Si3N4 thin films in ultra-high vacuum (UHV) have been studied using X-ray and ultraviolet photoemission, electron energy loss and Auger electron spectroscopies. Prior to the UHV studies, the films (grown ex situ on Si(1 0 0) wafers by low-pressure chemical vapor deposition) were characterized using primarily infrared reflection...

Compacting of Metal Powders