Neutron irradiation effects on thermal shock resistance and fracture toughness of graphites as plasma-facing first wall components for fusion reactor devices

Carbon ◽  
1989 ◽  
Vol 27 (4) ◽  
pp. 507-516 ◽  
Author(s):  
S. Sato ◽  
A. Kurumada ◽  
K. Kawamata ◽  
T. Takizawa ◽  
K. Teruyama
Keyword(s):  
Fracture Toughness ◽  
Thermal Shock ◽  
Neutron Irradiation ◽  
Thermal Shock Resistance ◽  
Fusion Reactor ◽  
First Wall ◽  
Irradiation Effects ◽  
Shock Resistance ◽  
Wall Components

Irradiation effects on thermal shock resistance and fracture toughness of HTGR-graphite

1980 ◽  
Vol 61 (3) ◽  
pp. 383-397 ◽  
Author(s):  
S. Sato ◽  
Y. Imamura ◽  
K. Kawamata ◽  
H. Awaji ◽  
T. Oku
Keyword(s):  
Fracture Toughness ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Irradiation Effects ◽  
Shock Resistance

Effect of AlF3 Content on Microstructure and Properties of Mullite/Al2O3 Composite Ceramics

2018 ◽  
Vol 922 ◽  
pp. 62-67
Author(s):  
Ke Zheng Sang ◽  
Fan Wang ◽  
De Jun Zeng ◽  
Hong Wei Li
Keyword(s):  
Fracture Toughness ◽  
Flexural Strength ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Diameter Ratio ◽  
Pressureless Sintering ◽  
Composite Ceramics ◽  
Microstructure And Properties ◽  
Shock Resistance ◽  
Mullite Whiskers

To reinforce the mullite/Al2O3 composite ceramics through formation of mullite whiskers, the composite ceramics were prepared by pressureless sintering using different AlF3 content. The microstructure, porosity, fracture toughness and thermal shock resistance of the composite ceramics were investigated. The results show that the addition of AlF3 can promote the mullite whisker formations, and the whiskers with the size of 3～10μm in diameter and a length-diameter ratio of 10～15 are obtained by sintering at 1600°C with the AlF3 content of 5wt%. Fracture toughness and thermal shock resistance of the composite ceramics are improved by the formation of mullite whisker. The fracture toughness of 4.79MPa•m1/2 can be obtained, and the 95.18% flexural strength remained after thermal shock.

Thermal shock resistance and fracture toughness during the graphitization process

Carbon ◽  
1981 ◽  
Vol 19 (2) ◽  
pp. 111-118 ◽  
Author(s):  
S. Sato ◽  
K. Kawamata ◽  
H. Awaji ◽  
M. Osawa ◽  
M. Manaka
Keyword(s):  
Fracture Toughness ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Shock Resistance

Investigation of Mechanical Property and Thermal Shock Behavior of Machinable B4C/BN Ceramics Composites

2008 ◽  
Vol 569 ◽  
pp. 53-56
Author(s):  
Tao Jiang ◽  
Hai Yun Jin ◽  
Zhi Hao Jin ◽  
Jian Feng Yang ◽  
Guan Jun Qiao
Keyword(s):  
Mechanical Property ◽  
Fracture Toughness ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Sintering Process ◽  
Shock Temperature ◽  
Shock Resistance ◽  
Thermal Shock Behavior ◽  
Hot Pressing Sintering ◽  
Better Than

The machinable B4C/BN ceramics composites were fabricated by hot-pressing sintering process at 1850oC for 1h under the pressure of 30MPa. The mechanical property, thermal shock behavior and machinability of the B4C/BN ceramics composites were investigated in this article. The experimental results showed that the fracture strength and fracture toughness of the B4C/BN nanocomposites were significantly improved in comparison with the B4C/BN microcomposites. The Vickers hardness of the B4C/BN nanocomposites and B4C/BN microcomposites decreased gradually with the increasing content of h-BN, while the machinability of the B4C/BN nanocomposites and B4C/BN microcomposites were significantly improved. The B4C/BN ceramics composites with the h-BN content more than 20wt% exhibited excellent machinability. The thermal shock resistances of the B4C/BN ceramics composites were better than that of the B4C monolith, and the thermal shock resistance of the B4C/BN nanocomposites was much better than that of the B4C/BN microcomposites. The thermal shock temperature difference (-Tc) of B4C monolith was about 300oC, while the -Tc of the B4C/BN microcomposites was about 500oC, the -Tc of the B4C/BN nanocomposites was about 600oC.

scholarly journals Degradations of Thermal Shock Resistance and Fracture Toughness of Neutron Irradiated Reactor Graphite

1987 ◽  
Vol 24 (7) ◽  
pp. 547-556 ◽  
Author(s):  
Sennosuke SATO ◽  
Kiyohiro KAWAMATA ◽  
Akira KURUMADA ◽  
Hirokazu UGACHI ◽  
Hideo AWAJI ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Reactor Graphite ◽  
Shock Resistance

Investigation of Thermal Shock Behaviors for Machinable SiC/h-BN Ceramic Composites

2007 ◽  
Vol 544-545 ◽  
pp. 391-394 ◽  
Author(s):  
Hai Yun Jin ◽  
Guan Jun Qiao ◽  
Ji Qiang Gao
Keyword(s):  
Fracture Toughness ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Bending Strength ◽  
Ceramic Composites ◽  
The Matrix ◽  
Shock Resistance

The SiC/h-BN ceramic composites with different h-BN size were fabricated by Plasma Active Sintering (PAS) method. For the SiC/ nano-sized h-BN ceramic composites, when the h-BN content was increased, because the nano-sized h-BN crystals were homogeneously dispersed around the SiC grains of the matrix, the bending strength and fracture toughness of the composites decreased slowly, but the hardness decreased sharply, therefore the machinability and thermal shock resistance were improved noticeable.

Sign in / Sign up

Export Citation Format

Share Document