Grain-boundary sliding and accommodation mechanism during creep of yttria-partially-stabilized zirconia

2002 ◽  
Vol 82 (10) ◽  
pp. 529-533 ◽  
Author(s):  
R. Duclos ◽  
J. Crampon ◽  
C. Carry
Keyword(s):  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Stabilized Zirconia ◽  
Partially Stabilized Zirconia ◽  
Yttria Partially Stabilized Zirconia ◽  
Boundary Sliding ◽  
Accommodation Mechanism

Direct Evidence of Dopant-Enhanced Grain-Boundary Sliding in Yttria-Stabilized Zirconia Bicrystals

2005 ◽  
Vol 88 (4) ◽  
pp. 938-942 ◽  
Author(s):  
Atsutomo Nakamura ◽  
Naoya Shibata ◽  
Nobusato Morishige ◽  
Katsuyuki Matsunaga ◽  
Yuichi Ikuhara ◽  
...  
Keyword(s):  
Grain Boundary ◽  
Direct Evidence ◽  
Grain Boundary Sliding ◽  
Yttria Stabilized Zirconia ◽  
Stabilized Zirconia ◽  
Boundary Sliding

Examination of Fracture Interfaces in Silicon Nitride

1975 ◽  
Vol 33 ◽  
pp. 60-61
Author(s):  
Nancy J. Tighe
Keyword(s):  
Silicon Nitride ◽  
Grain Boundary ◽  
Crack Growth ◽  
Subcritical Crack Growth ◽  
Slow Crack Growth ◽  
Ceramic Materials ◽  
Grain Boundary Sliding ◽  
Boundary Phase ◽  
Turbine Engines ◽  
Boundary Sliding

Silicon nitride is one of the ceramic materials being considered for the components in gas turbine engines which will be exposed to temperatures of 1000 to 1400°C. Test specimens from hot-pressed billets exhibit flexural strengths of approximately 50 MN/m2 at 1000°C. However, the strength degrades rapidly to less than 20 MN/m2 at 1400°C. The strength degradition is attributed to subcritical crack growth phenomena evidenced by a stress rate dependence of the flexural strength and the stress intensity factor. This phenomena is termed slow crack growth and is associated with the onset of plastic deformation at the crack tip. Lange attributed the subcritical crack growth tb a glassy silicate grain boundary phase which decreased in viscosity with increased temperature and permitted a form of grain boundary sliding to occur.

INTERNAL FRICTION PEAKS CONNECTED WITH GRAIN BOUNDARY SLIDING IN Al

1983 ◽  
Vol 44 (C9) ◽  
pp. C9-759-C9-764
Author(s):  
E. Bonetti ◽  
A. Cavallini ◽  
E. Evangelista ◽  
P. Gondi
Keyword(s):  
Internal Friction ◽  
Grain Boundary ◽  
Grain Boundary Sliding ◽  
Boundary Sliding
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