Joining of silicon nitride ceramics by hot pressing

1987 ◽  
Vol 22 (4) ◽  
pp. 1259-1264 ◽  
Author(s):  
Mamoru Nakamura ◽  
Katsushi Kubo ◽  
Shuzo Kanzaki ◽  
Hideyo Tabata
Keyword(s):  
Silicon Nitride ◽  
Hot Pressing ◽  
Nitride Ceramics

scholarly journals Comparison between Pulse Electric Current Sintering and Hot Pressing of Silicon Nitride Ceramics.

1999 ◽  
Vol 107 (1250) ◽  
pp. 887-890 ◽  
Author(s):  
Shigetaka WADA ◽  
Motohiro SUGANUMA ◽  
Yasunori KITAGAWA ◽  
Norimitsu MURAYAMA
Keyword(s):  
Silicon Nitride ◽  
Electric Current ◽  
Hot Pressing ◽  
Pulse Electric Current ◽  
Nitride Ceramics ◽  
Pulse Electric

Effect of Oxynitride Grain Boundary Phase on Toughening of Silicon Nitride Ceramics

2006 ◽  
Vol 317-318 ◽  
pp. 649-652 ◽  
Author(s):  
Takafumi Kusunose ◽  
Tohru Sekino ◽  
P.E.D. Mogan ◽  
Koichi Niihara
Keyword(s):  
Fracture Toughness ◽  
Silicon Nitride ◽  
Grain Boundary ◽  
Crack Propagation ◽  
Hot Pressing ◽  
Boundary Phase ◽  
Toughening Mechanism ◽  
Nitride Ceramics

The Si3N4/YSiO2N composite in which crystalline YSiO2N was formed as grain boundary phase was fabricated by hot-pressing the mixture of SiO2, Si3N4 and Y2O3. The fracture toughness of this composite was significantly improved, compared to the Si3N4 composites containing Y5Si3O12N or Y2Si3O3N4 as a grain boundary phases. To clarify the toughening mechanism, the microstructure and the crack propagation profiles were observed.

Microstructure, toughness and flexural strength of self-reinforced silicon nitride ceramics doped with yttrium oxide and ytterbium oxide

2001 ◽  
Vol 201 (2) ◽  
pp. 238-249 ◽  
Author(s):  
Y. S. Zheng ◽  
K. M. Knowles ◽  
J. M. Vieira ◽  
A. B. Lopes ◽  
F. J. Oliveira
Keyword(s):  
Silicon Nitride ◽  
Flexural Strength ◽  
Yttrium Oxide ◽  
Ytterbium Oxide ◽  
Nitride Ceramics

Effect of α/β phase ratio on microstructure and mechanical properties of silicon nitride ceramics

2001 ◽  
Vol 16 (8) ◽  
pp. 2264-2270 ◽  
Author(s):  
Hirokazu Kawaoka ◽  
Tomohiko Adachi ◽  
Tohru Sekino ◽  
Yong-Ho Choa ◽  
Lian Gao ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Silicon Nitride ◽  
Phase Ratio ◽  
Phase Content ◽  
Sintering Process ◽  
Β Phase ◽  
Nitride Ceramics ◽  
Pulse Electric ◽  
Sintering Condition ◽  
Sintered Materials

Highly densed silicon nitride ceramics with various α/β phase ratios were produced by pulse electric current sintering process. The β-phase content of Si3N4 in sintered materials varied from 20 to 100 wt% depending on the sintering condition. The microstructure was observed by scanning electron microscopy and investigated by image analysis. Young's modulus, hardness, fracture toughness, and strength were strongly dependent on the α/β phase ratio. The fracture toughness increased from 4.6 MPa m1/2 for 20-wt% b-phase content to 8.2 MPa m1/2 for 95-wt% β-phase content, and the fracture strength showed a maximum value of about 1.6 GPa at 60-to-80-wt% β-phase content.

Metallizing of silicon nitride ceramics

1986 ◽  
Vol 2 (3) ◽  
pp. 241
Author(s):  
Akio Sayano ◽  
Shun-ichiro Tanaka ◽  
Kazuo Ikeda
Keyword(s):  
Silicon Nitride ◽  
Nitride Ceramics
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