Electromagnetic Wave-transparent Porous Silicon Nitride Ceramic Prepared by Gel-casting Combined with In-situ Nitridation Reaction

2021 ◽  
Author(s):  
Conglin Zhang ◽  
Fang Ye ◽  
Laifei Cheng ◽  
Mingxing Li ◽  
Jie Zhou ◽  
...  
Keyword(s):  
Electromagnetic Wave ◽  
Silicon Nitride ◽  
Porous Silicon ◽  
Silicon Nitride Ceramic ◽  
Gel Casting ◽  
Nitridation Reaction

Fabrication and properties of in situ silicon nitride nanowires reinforced porous silicon nitride (SNNWs/SN) composites

2018 ◽  
Vol 38 (6) ◽  
pp. 2671-2675 ◽  
Author(s):  
Duan Li ◽  
Bin Li ◽  
Xuejin Yang ◽  
Shitao Gao ◽  
Yuanyi Zheng
Keyword(s):  
Silicon Nitride ◽  
Porous Silicon

The sound absorption properties of highly porous silicon nitride ceramic foams

2020 ◽  
Vol 820 ◽  
pp. 153067 ◽  
Author(s):  
Zhongpei Du ◽  
Dongxu Yao ◽  
Yongfeng Xia ◽  
Kaihui Zuo ◽  
Jinwei Yin ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Porous Silicon ◽  
Sound Absorption ◽  
Absorption Properties ◽  
Silicon Nitride Ceramic ◽  
Ceramic Foams ◽  
Highly Porous

A facile strategy for fabricating self-sealing dense coating grown in-situ on porous silicon nitride ceramics

2021 ◽  
Vol 41 (3) ◽  
pp. 2162-2167
Author(s):  
Wenjiu Duan ◽  
Dechang Jia ◽  
Delong Cai ◽  
Bo Niu ◽  
Zhihua Yang ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Porous Silicon ◽  
Nitride Ceramics

Fabrication and properties of porous silicon nitride wave-transparent ceramics via gel-casting and pressureless sintering

2016 ◽  
Vol 663 ◽  
pp. 174-180 ◽  
Author(s):  
Xuejin Yang ◽  
Bin Li ◽  
Changrui Zhang ◽  
Siqing Wang ◽  
Kun Liu ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Porous Silicon ◽  
Pressureless Sintering ◽  
Transparent Ceramics ◽  
Gel Casting

Synthesis of Porous Silicon Nitride-Boron Nitride Composites by Gel-Casting and PIP

2014 ◽  
Vol 23 (8) ◽  
pp. 2829-2833 ◽  
Author(s):  
Kun Liu ◽  
Changrui Zhang ◽  
Bin Li ◽  
Siqing Wang ◽  
Feng Cao
Keyword(s):  
Silicon Nitride ◽  
Porous Silicon ◽  
Boron Nitride ◽  
Gel Casting

Hertzian contact damage in a highly porous silicon nitride ceramic

2003 ◽  
Vol 23 (8) ◽  
pp. 1193-1197 ◽  
Author(s):  
Jihong She ◽  
Jian-Feng Yang ◽  
Yoshihisa Beppu ◽  
Tatsuki Ohji
Keyword(s):  
Silicon Nitride ◽  
Porous Silicon ◽  
Hertzian Contact ◽  
Contact Damage ◽  
Silicon Nitride Ceramic ◽  
Highly Porous

Synthesis of Porous Silicon Nitride Ceramic with a Compositional Gradient

2009 ◽  
Vol 631-632 ◽  
pp. 477-482
Author(s):  
M. Knoll ◽  
Monika Willert-Porada
Keyword(s):  
Surface Layer ◽  
Silicon Nitride ◽  
Porous Silicon ◽  
Compositional Gradient ◽  
Sintered Ceramic ◽  
Silicon Nitride Ceramic ◽  
Carbon And Nitrogen ◽  
Barrier Coating ◽  
N2 Atmosphere ◽  
Heating Up

This paper summarises results of a study on graded surface layer composition in porous silicon nitride ceramics with a nominal Yb-silicate, Yb2SiO5-additive content of 3.2 mol%, corresponding to 10wt%. A compositional gradient of the additive is formed within the sintered part, depending upon the sintering conditions. The thickness and the phase content of the compositional gradient is significantly affected by the nitrogen activity of the sintering atmosphere. When argon gas is used during heating up and replaced by nitrogen upon soaking, the surface of the sintered ceramic is free of Yb2SiO5, whereas in N2-atmosphere a silicate-rich coating is found as surface layer of the porous silicon nitride ceramic. In presence of carbon and nitrogen, the surface is covered by SiC. In particular the Yb-silicate enriched surface layer can be used as base for an Environmental Barrier Coating, EBC, to protect the interior of the ceramic from hot gas corrosion.

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