Optimal design and preparation of silicon nitride ceramic radome material with gradient porous structure

2010 ◽  
Vol 39 (1/2) ◽  
pp. 72
Author(s):  
Fei Chen ◽  
ng Li ◽  
Faqiang Yan ◽  
Qiang Shen ◽  
Lianmeng Zhang
Keyword(s):  
Silicon Nitride ◽  
Optimal Design ◽  
Porous Structure ◽  
Silicon Nitride Ceramic

scholarly journals Experiment on Foreign Object Damage of Gas Turbine-Grade Silicon Nitride Ceramic

1998 ◽  
Author(s):  
Hiro Yoshida ◽  
Takashi Nakashima ◽  
Makoto Yoshida ◽  
Yasushi Hara ◽  
Toru Shimamori
Keyword(s):  
Elevated Temperature ◽  
Silicon Nitride ◽  
Elevated Temperatures ◽  
Tensile Load ◽  
Strength Degradation ◽  
Spall Fracture ◽  
Silicon Nitride Ceramic ◽  
Impact Tests ◽  
The Impact ◽  
Bending Fracture

A new high quality turbine system using monolithic silicon-nitride ceramic is under development. In this study particle impact tests of the silicon-nitride have been tried at room and elevated temperatures with and without tensile load, which simulates centrifugal force of blade rotation. In the experiment 1 mm diameter particle is impacted at velocities up to 900 m s−1. In this paper, critical velocities for bending fracture and Hertzian cracks are examined. Moreover, strength degradation at elevated temperature and spall fracture of the blade are discussed. The main results are: 1) The bending fracture mode critical impact velocity for soft particles is higher than that for hard particles. 2)The impact parameter ϕ for initiation of Hertzian cracks ranges 1.08×10−5 – 1.56×10−5 for the materials tested. 3)Strength degradation at elevated temperature was clearly observed. 4) In the impact tests on blades spall fracture, which was caused by interaction of stress waves, appeared.

Chemical interaction between Fe and silicon nitride ceramic

1997 ◽  
Vol 17 (1) ◽  
pp. 25-31 ◽  
Author(s):  
E. Heikinheimo ◽  
I. Isomäki ◽  
A.A. Kodentsov ◽  
F.J.J. van Loo
Keyword(s):  
Silicon Nitride ◽  
Chemical Interaction ◽  
Silicon Nitride Ceramic

Characterization of hole taper in laser drilling of silicon nitride ceramic under water

2018 ◽  
Vol 44 (11) ◽  
pp. 13449-13452 ◽  
Author(s):  
Qiang Chen ◽  
Hong-Jian Wang ◽  
Dong-Tao Lin ◽  
Fei Zuo ◽  
Zhuang-Xin Zhao ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Laser Drilling ◽  
Silicon Nitride Ceramic

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
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