Comparison of properties of sintered and sintered reaction-bonded silicon nitride fabricated by microwave and conventional heating
Description: A comparison of microwave and conventional processing of silicon nitride-based ceramics was performed to identify any differences between the two, such as improved fabrication parameters or increased mechanical properties. Two areas of thermal processing were examined: (1) sintered silicon nitride (SSN) and (2) sintered reaction-bonded silicon nitride (SRBSN). The SSN powder compacts showed improved densification and enhanced grain growth. SRBSN materials were fabricated in the microwave with a one-step process using cost-effective raw materials. The SRBSN materials had properties appropriate for structural applications. Observed increases in fracture toughness for the microwave processed SRBSN materials were attributable to enhanced elongated grain growth.
Date: October 1, 1994
Creator: Tiegs, T. N.; Kiggans, J. O. Jr.; Lin, H. T. & Willkens, C. A.
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