Mechanical Properties of Silicon Nitride Ceramic Material Systems Determined by Acoustic Microscopy

1994 ◽  
pp. 729-732
Author(s):  
C.M. Flannery ◽  
T. Flaherty ◽  
D. Zhangt ◽  
R.T. Cundill ◽  
G.M. Crean
Keyword(s):  
Mechanical Properties ◽  
Silicon Nitride ◽  
Ceramic Material ◽  
Acoustic Microscopy ◽  
Silicon Nitride Ceramic ◽  
Material Systems

Characterization of a silicon nitride ceramic material for ceramic springs

2020 ◽  
Vol 40 (10) ◽  
pp. 3541-3554 ◽  
Author(s):  
Iyas Khader ◽  
Christof Koplin ◽  
Christian Schröder ◽  
Jens Stockmann ◽  
Wieland Beckert ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Ceramic Material ◽  
Silicon Nitride Ceramic

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

2007 ◽  
Vol 124-126 ◽  
pp. 1461-1464
Author(s):  
Chang Gyu Kang ◽  
Joong Gwun Park ◽  
Tae Won Kang ◽  
Chul Kim ◽  
Tae Woo Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silicon Nitride ◽  
Molten Aluminum ◽  
Continuous Process ◽  
High Hardness ◽  
High Strength ◽  
High Fracture Toughness ◽  
High Fracture ◽  
Silicon Nitride Ceramic ◽  
Ceramic Components

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.

Silicon Nitride Ceramic Matrix for CMCs from Silane Derived Si Powders and Preceramic Polymers

1994 ◽  
Vol 365 ◽  
Author(s):  
Wendell E. Rhine ◽  
Annamarie Lightfoot ◽  
Dietmar Seyferth ◽  
John S. Haggerty
Keyword(s):  
Mechanical Properties ◽  
Silicon Nitride ◽  
Ceramic Matrix ◽  
Ceramic Composites ◽  
Ceramic Fibers ◽  
Silicon Nitride Ceramic ◽  
Laser Pyrolysis ◽  
Preceramic Polymers ◽  
Sic Fibers ◽  
Potential Matrix

ABSTRACTSi powders synthesized by the laser pyrolysis of silane can be nitrided at 1200–1250°C, producing an improved reaction bonded silicon nitride. This RBSN is a potential matrix for composites since it can be formed at temperatures which do not degrade the strengths of commercially available amorphous ceramic fibers. However, the density of the RBSN matrix has been limited to about 75% using the silane-derived Si powder. Combining Si powders and preceramic polymers offers an approach for increasing the density and mechanical properties of the reaction-formed Si3N4 matrix. The incorporation of polysilazanes inhibited the nitridation at 1250°C, but samples could be effectively nitrided at 1400°C. These higher nitriding temperatures are compatible with SCS-6 and other lowoxygen, crystalline SiC fibers which can be used as reinforcements for ceramic composites.

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