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

Characterization of porous silicon nitride ceramics using bentonite as binder and sintering additive

2009 ◽  
Vol 60 (5) ◽  
pp. 456-460 ◽  
Author(s):  
Guang-Peng Jiang ◽  
Jian-Feng Yang ◽  
Ji-Qiang Gao ◽  
Koichi Niihara
Keyword(s):  
Silicon Nitride ◽  
Porous Silicon ◽  
Sintering Additive ◽  
Nitride Ceramics

Effects of Sintering Additives on the Microstructure and Mechanical Properties of Silicon Nitride Ceramics by GPS

2010 ◽  
Vol 105-106 ◽  
pp. 27-30 ◽  
Author(s):  
Wei Ru Zhang ◽  
Feng Sun ◽  
Ting Yan Tian ◽  
Xiang Hong Teng ◽  
Min Chao Ru ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Phase Transformation ◽  
Silicon Nitride ◽  
Porous Silicon ◽  
Flexural Strength ◽  
Relative Density ◽  
Sintering Additives ◽  
Microstructure And Mechanical Properties ◽  
Nitride Ceramics

Silicon nitride ceramics were prepared by gas pressure sintering (GPS) with different sintering additives, including La2O3, Sm2O3 and Al2O3. Effect of sintering additives on the phase-transformation, microstructure and mechanical properties of porous silicon nitride ceramics was investigated. The results show that the reaction of sintering additives each other and with SiO2 had key effects on the phase-transformation, grain growing and grain boundaries. With 9MPa N2 atmosphere pressure, holding 1h at 1850°C, adding 10wt% one of the La2O3, Sm2O3, Al2O3, porous silicon nitride was prepared and the relative density was 78%, 72%, 85% respectively. The flexural strength was less than 500MPa, and the fracture toughness was less than 4.8MPam1/2. Dropping compounds sintering additives, such as La2O3+Al2O3, Sm2O3+Al2O3 effectively improves the sintering and mechanical properties. The relative density was 99.2% and 98.7% with 10wt% compounds sintering additives. The grain ratio of length to diameter was up to 1:8. The flexural strength was more than 900MPa, and the fracture toughness was more than 8.9MPam1/2.

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

Transient thermal shock behavior simulation of porous silicon nitride ceramics

2016 ◽  
Vol 42 (2) ◽  
pp. 3130-3137 ◽  
Author(s):  
Meng Chen ◽  
Hongjie Wang ◽  
Haiyun Jin ◽  
Xide Pan ◽  
Zhihao Jin
Keyword(s):  
Silicon Nitride ◽  
Porous Silicon ◽  
Thermal Shock ◽  
Behavior Simulation ◽  
Nitride Ceramics ◽  
Thermal Shock Behavior ◽  
Transient Thermal

Preparation and properties of porous silicon nitride ceramics with polymethyl methacrylate as pore-forming agent

2020 ◽  
Vol 46 (10) ◽  
pp. 17122-17129
Author(s):  
Hailing Yang ◽  
Yong Li ◽  
Qinggang Li ◽  
Zhi Wang ◽  
Hao Wu ◽  
...  
Keyword(s):  
Silicon Nitride ◽  
Porous Silicon ◽  
Polymethyl Methacrylate ◽  
Nitride Ceramics
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