Mechanical Properties of Si₃N₄ Ceramics Prepared by Nitrided Pressureless Sintered (NPS) Process

Abstract:

As an alternative to degassing pipe and rotor blade using in molten aluminum industry, we investigate the mechanical properties of silicon nitride ceramic components prepared by nitrided pressureless sintered (NPS) process, which process is the continuous process of nitridation reaction process combined with pressureless sintering. Mechanical properties of silicon nitride prepared by NPS process with sintering additives of 5wt% Y2O3, 5wt% Al2O3 and 20wt% Si show high strength, >500 MPa, high hardness, 12.6 GPa, and superior damage tolerances with high fracture toughness, 9.8 MPam1/2.

• Periodical: Solid State Phenomena (Volumes 124-126)
• Pages: 1461-1464
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.124-126.1461
• Online since: June 2007
• Authors: Chang Gyu Kang, Joong Gwun Park, Tae Won Kang, Chul Kim, Tae Woo Kim, In Sub Han, Kee Sung Lee
• Keywords: Mechanical Property, NPS, Strength Degradation

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