Strength Of Crack-healed Si_3N_4/SiC Composite Ceramics at Crack-healing Temperature

2000 ◽  
Vol 2000 (0) ◽  
pp. 499-500
Author(s):  
Sousuke SAKAMOTO ◽  
Sannshiro TAKESHITA ◽  
Kotoji ANDO ◽  
Min Cheol CHU ◽  
Shigemi SATO
Keyword(s):  
Crack Healing ◽  
Composite Ceramics ◽  
Healing Temperature

High Temperature Static Fatigue Properties and Crack Healing Temperature of Crack Healed Mullite/SiC Composite Ceramics

2000 ◽  
Vol 2000 (0) ◽  
pp. 497-498
Author(s):  
Kiichi TSUJI ◽  
Kotokaze HURUSAWA ◽  
Tuyosi HANAGATA ◽  
Kotoji ANDO ◽  
Shigemi SATO
Keyword(s):  
High Temperature ◽  
Fatigue Properties ◽  
Static Fatigue ◽  
Crack Healing ◽  
Composite Ceramics ◽  
Healing Temperature

CRACK-HEALING BEHAVIOR AND BENDING STRENGTH OF Al2O3/SiC COMPOSITE CERAMICS ACCORDING TO THE AMOUNT OF ADDITIVE Y2O3

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2910-2915 ◽  
Author(s):  
KI WOO NAM
Keyword(s):  
High Temperature ◽  
Vickers Hardness ◽  
Bending Strength ◽  
Composite Ceramic ◽  
Crack Healing ◽  
Composite Ceramics ◽  
Strength Recovery ◽  
In Situ Observations ◽  
Healing Temperature

Three Al 2 O 3/ SiC composite ceramics were prepared, which included 1, 3 or 5 wt. % Y 2 O 3, and their high-temperature bending strengths and in-situ crack-healing behaviors examined. A surface elliptical-crack of about 100 µm in diameter was introduces on the specimens using a Vickers hardness indenter. From in-situ observations, the Al 2 O 3/ SiC composite ceramic with 3 wt.% Y 2 O 3 showed superior crack-healing ability than the 1 and 5 wt.% Y 2 O 3 ceramics. The as-cracked specimen with 3 wt.% Y 2 O 3 showed strength recovery on healing for 1 hr at 1473 K in air, which may have been due to the lower crack-healing temperature on the addition of 3 wt.% Y 2 O 3. The heat-resistance limit temperatures of the crack-healed Al 2 O 3/ SiC composite ceramics were 1073, 1373 and 873 K for 1, 3 and 5 wt.% Y 2 O 3, respectively.

scholarly journals Crack Healing Behavior with Healing Temperature in Si3N4/SiC Composite Ceramics

2005 ◽  
Vol 15 (12) ◽  
pp. 780-785
Author(s):  
Oh-Sung Song ◽  
Kotoji Ando ◽  
Koji Takahashi ◽  
Wataru Nakao ◽  
Ji-Ho Ryu
Keyword(s):  
Crack Healing ◽  
Composite Ceramics ◽  
Healing Temperature

Strength and Surface Morphology of Si3N4 Composite Ceramics Coated with SiO2 Gel

2007 ◽  
Vol 124-126 ◽  
pp. 719-722 ◽  
Author(s):  
M.K. Kim ◽  
H.S. Kim ◽  
S.B. Kang ◽  
S.H. Ahn ◽  
Ki Woo Nam
Keyword(s):  
Test Specimen ◽  
Bending Strength ◽  
Crack Healing ◽  
Hot Press ◽  
Composite Ceramics ◽  
Coating Time ◽  
Healing Temperature ◽  
Cracked Specimens ◽  
Elliptical Cracks ◽  
Tensile Surface

The Si3N4/SiC and Si3N4/SiC/TiO2 composite ceramics were sintered at 1850 °C, for 2 h, in air by Hot-Press. A semi-elliptical surface crack was made at the center of the tensile surface of the test specimen using a Vickers indenter at a load of 24.5 N. By this method, the crack length on surface was made the semi-elliptical cracks of about 100 ㎛. Crack-healing behavior depends on healing temperature. The optimum healing condition of Si3N4/SiC and Si3N4/SiC/TiO2 composite ceramics are well known for 1,300 °C, 1h in air environment. So Smooth and as-cracked specimens were heated in this condition. To investigate temperature-dependence of the SiO2 gel coated specimen, four kinds of temperatures (800, 900, 1000, 1,300 °C) were tested. And to investigate SiO2 gel coating time-dependent, one and three times were coated. SiO2 gel coated specimens indicated increase of bending strength as the temperature goes up. Moreover the bending strength of SiO2 gel coating specimens was similar to the bending strength of healed smooth specimen at 900 °C.

K-0904 Strength of Si_3N_4/SiC Composite Ceramics at Crack Healing Temperature (1000℃)

2001 ◽  
Vol I.01.1 (0) ◽  
pp. 489-490
Author(s):  
Kotoji ANDO ◽  
Min-Cheol CHU ◽  
Keiji HOUJOU ◽  
Koji TAKAHASI ◽  
Shigemi SATO ◽  
...  
Keyword(s):  
Crack Healing ◽  
Composite Ceramics ◽  
Healing Temperature

Crack-Healing Behavior under Stress and Fatigue Strength at Elevated Temperature of Crack-Healed Si3N4/SiC Composite Ceramics

2001 ◽  
Vol 206-213 ◽  
pp. 819-822 ◽  
Author(s):  
Kotoji Ando ◽  
K. Houjyou ◽  
Min Cheol Chu ◽  
Kunimasa Takahashi ◽  
F. Yao ◽  
...  
Keyword(s):  
Elevated Temperature ◽  
Fatigue Strength ◽  
Crack Healing ◽  
Composite Ceramics

Strength recovery of machined Al2O3/SiC composite ceramics by crack healing

2007 ◽  
Vol 30 (12) ◽  
pp. 1140-1148 ◽  
Author(s):  
M. ONO ◽  
W. NAKAO ◽  
K. TAKAHASHI ◽  
K. ANDO
Keyword(s):  
Crack Healing ◽  
Composite Ceramics ◽  
Strength Recovery

Crack healing behaviour and high-temperature strength of mullite/SiC composite ceramics

2002 ◽  
Vol 22 (8) ◽  
pp. 1313-1319 ◽  
Author(s):  
Kotoji Ando ◽  
Min-Cheol Chu ◽  
Kiichi Tsuji ◽  
Toshikazu Hirasawa ◽  
Yasuyoshi Kobayashi ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Strength ◽  
Crack Healing ◽  
Composite Ceramics
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