1444 Influence of the flaw-size distribution's parameter on the fracture strength in ceramics

2008 ◽  
Vol 2008.1 (0) ◽  
pp. 295-296
Author(s):  
Chisato WAKABAYASHI ◽  
Yohtaro MATSUO ◽  
Kouichi YASUDA ◽  
Tadashi SHIOTA
Keyword(s):  
Fracture Strength ◽  
Flaw Size

Strengthening of ZrO2 Ceramics due to Nano-Crystallization

2006 ◽  
Vol 45 ◽  
pp. 1674-1679 ◽  
Author(s):  
Koji Morita ◽  
Keijiro Hiraga ◽  
Byung Nam Kim ◽  
Hidehiro Yoshida
Keyword(s):  
Grain Size ◽  
Fracture Strength ◽  
Ceramic Materials ◽  
Flaw Size ◽  
Maximum Strength ◽  
Oxide Ceramic ◽  
Transformation Stress

The fracture strength σf of ZrO2-based ceramics tends to increase with decreasing grain size d. As compared with the data for submicrometer-grain-sized material with d ≈ 350 nm, nano-crystallization of ZrO2 ceramics less than d ≈ 90 nm can improve σf by a factor of 2.0-2.5. The maximum strength reaches σf ≈ 2500 MPa, which is classed as the highest σf of oxide ceramic materials. The high σf can be associated with an increase in the critical t →m transformation stress and a decrease in the flaw size due to nano-crystallization.

Tensile test of sintered Si3N4 and the influence of process defects such as pores on fracture strength.

1989 ◽  
Vol 38 (424) ◽  
pp. 32-38 ◽  
Author(s):  
Hidehiro KISHIMOTO ◽  
Akira UENO ◽  
Hiroshi KAWAMOTO ◽  
Sachio URA
Keyword(s):  
Tensile Test ◽  
Fracture Strength

Improved magnetic properties and fracture strength of NdFeB by dehydrogenation

2006 ◽  
Vol 306 (2) ◽  
pp. 176-180 ◽  
Author(s):  
M. Yan ◽  
L.Q. Yu ◽  
J.M. Wu ◽  
X.G. Cui
Keyword(s):  
Magnetic Properties ◽  
Fracture Strength
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