scholarly journals Growth Behavior of Manganese-Metallized Layer on Silicon-Nitride Ceramics

1991 ◽  
Vol 99 (1148) ◽  
pp. 324-328
Author(s):  
Toshiyuki TAKASHIMA ◽  
Tsuyoshi YAMAMOTO ◽  
Toshio NARITA
Keyword(s):  
Silicon Nitride ◽  
Growth Behavior ◽  
Nitride Ceramics ◽  
Metallized Layer

Grain Growth Behavior of Fine-Grained Silicon Nitride Ceramics

1996 ◽  
Vol 204-206 ◽  
pp. 515-520 ◽  
Author(s):  
H. Hirotsuru ◽  
Mamoru Mitomo ◽  
Toshiyuki Nishimura
Keyword(s):  
Silicon Nitride ◽  
Grain Growth ◽  
Growth Behavior ◽  
Fine Grained ◽  
Nitride Ceramics ◽  
Grain Growth Behavior

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.

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