scholarly journals Synthesis of Silicon Nitride Ceramic Material using Direct Nitridation Process

2018 ◽  
Vol 5 (8) ◽  
pp. 101-105 ◽  
Author(s):  
Cuong Van Tran ◽  
Duong Duc La
Keyword(s):  
Silicon Nitride ◽  
Ceramic Material ◽  
Silicon Nitride Ceramic ◽  
Nitridation Process ◽  
Direct Nitridation

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

Study on Nitridation of Silicon Added With Amorphous Silicon Nitride

2011 ◽  
Author(s):  
Yanhui Li ◽  
Li Wang ◽  
Shaowu Yin ◽  
Fuming Yang ◽  
Chuanping Liu ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Amorphous Silicon ◽  
Early Stage ◽  
Conversion Ratio ◽  
Amorphous Silicon Nitride ◽  
Nitridation Process ◽  
Silicon Nitride Powder ◽  
Different Temperatures ◽  
Direct Nitridation ◽  
The Relationship

The direct nitridation process of silicon added with amorphous silicon nitride powder at atmospheric pressure was investigated and the product was analyzed by XRD and SEM. Based on the relationship between the conversion ratio of silicon and the reaction time at different temperatures, a physical and mathematical model was derived to describe the nitridation process of silicon particles. The results showed that the conversion ratio of silicon increased rapidly at the early stage of reaction. And the reaction would be accelerated by reducing the size of silicon particle and increasing the pressure of N2. At the range of experimental temperature, the conversion ratio of silicon increases with improving temperature.

Experimental Study on Continuous Preparation of Ultrafine Silicon Nitride Powders in Transport Bed

2011 ◽  
Vol 130-134 ◽  
pp. 14-18
Author(s):  
Shao Wu Yin ◽  
Li Wang ◽  
Li Ge Tong ◽  
Fu Ming Yang ◽  
Yan Hui Li
Keyword(s):  
Experimental Study ◽  
Particle Size ◽  
Phase Composition ◽  
Silicon Nitride ◽  
Amorphous Silicon ◽  
Amorphous Silicon Nitride ◽  
Nitridation Process ◽  
Composition And Structure ◽  
Continuous Preparation ◽  
Direct Nitridation

Ultrafine e grain amorphous silicon nitride (Si3N4) powders were produced via direct nitridation process of silicon powders in transport bed. The properties of the nitridation products, such as morphology, phase composition, chemical composition and structure, were examined using standard characterization techniques (SEM, XRD, FTIR, etc). The experimental results showed, in the case of silicon powders with particle size of 2.7μm, the conversion rate of silicon was 53.4% at reaction temperature of 1380°C and reaction time of 2.7minutes, and the products mainly comprised amorphous silicon nitride powders.

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
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