Fabrication, mechanical properties and thermal shock resistance of a dense SiC NWs/α-Si3N4 composite coating for protecting porous Si3N4 ceramics

2019 ◽  
Vol 45 (17) ◽  
pp. 23241-23247 ◽  
Author(s):  
Binglei Wang ◽  
Duandan Shangguan ◽  
Ruiqing Qiao ◽  
Fan Zhang ◽  
Yu Bai ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Shock ◽  
Composite Coating ◽  
Thermal Shock Resistance ◽  
Shock Resistance ◽  
Porous Si3n4 ◽  
Si3n4 Ceramics ◽  
Porous Si3n4 Ceramics

Thermal shock resistance of γ-Y2Si2O7/Y2O3-Al2O3-SiO2 coating for porous Si3N4 ceramics

2019 ◽  
Vol 357 ◽  
pp. 304-312 ◽  
Author(s):  
Xingyu Fan ◽  
Hongjie Wang ◽  
Min Niu ◽  
Yunfei Wang ◽  
Dahai Zhang ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Sio2 Coating ◽  
Shock Resistance ◽  
Porous Si3n4 ◽  
Si3n4 Ceramics ◽  
Porous Si3n4 Ceramics

Preparation of ZrO2 Composite Ceramics with High Thermal Shock Resistance

2012 ◽  
Vol 455-456 ◽  
pp. 650-654 ◽  
Author(s):  
He Yi Ge ◽  
Jian Ye Liu ◽  
Xian Qin Hou ◽  
Dong Zhi Wang
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Sintering Temperature ◽  
Fiber Composite ◽  
Physical And Mechanical Properties ◽  
Composite Ceramics ◽  
Shock Resistance ◽  
Absorption Measurements

The physical and mechanical properties of nanometer ZrO2-ZrO2fiber composite ceramics were studied by introduction of ZrO2fiber. ZrO2composite ceramics at different sintering temperature was investigated by porosity and water absorption measurements, flexual strength and thermal shock resistance analysis. Results showed that ZrO2composite ceramics containing 15 wt% ZrO2fiber with sintering temperature of 1650°C exhibited good mechanical properties and thermal shock resistance. The porosity and the water absorption were 8.84% and 1.62%, respectively. The flexual strength was 975 MPa and the thermal shock times reached 31 times. Scanning electron microscope (SEM) was used to analyze the microstructure of ZrO2composite ceramics.

Thermal Shock Resistance of ZrO2 Fiber/Al2O3 Ceramics

2011 ◽  
Vol 306-307 ◽  
pp. 754-757 ◽  
Author(s):  
Xian Qin Hou ◽  
Jian Ye Liu ◽  
He Yi Ge
Keyword(s):  
Mechanical Properties ◽  
Electron Microscope ◽  
Water Absorption ◽  
Thermal Shock ◽  
Thermal Shock Resistance ◽  
Sintering Temperature ◽  
Physical And Mechanical Properties ◽  
Shock Resistance ◽  
Scanning Electron ◽  
Absorption Measurements

The physical and mechanical properties of alumina (Al2O3) ceramics by introduction of zirconia (ZrO2) fiber were studied. ZrO2/Al2O3ceramics at different sintering temperature was investigated by porosity and water absorption measurements, flexual strength and thermal shock resistance analysis. Results showed that Al2O3 ceramics containing 15 wt% ZrO2fiber with sintering temperature of 1650°C exhibited good mechanical properties and thermal shock resistance. The porosity and water absorption were 7.4% and 0.69%, respectively. The flexual strength was 613 MPa and the thermal shock times reached 29 times. Scanning electron microscope (SEM) was used to analyze the microstructure of Al2O3 ceramics.

Effects of Pore Morphology on the Fabrication and Mechanical Properties of Porous Si3N4 Ceramics

2007 ◽  
Vol 280-283 ◽  
pp. 1231-1236
Author(s):  
Jian Feng Yang ◽  
Ji Qiang Gao ◽  
Guo Jun Zhang ◽  
Ichiro Hayashi ◽  
Tatsuki Ohji
Keyword(s):  
Mechanical Properties ◽  
Gas Permeability ◽  
Slip Casting ◽  
Porous Ceramics ◽  
Pore Morphology ◽  
Porous Si ◽  
Die Pressing ◽  
Porous Si3n4 ◽  
Si3n4 Ceramics ◽  
Porous Si3n4 Ceramics

Porous Si3N4 ceramics with different pore morphology have been fabricated, utilizing either organic whiskers or starch as the fugitive agents, through slip-casting and die-pressing technique, respectively. The obtained porous ceramics have rod shaped or equiaxial pore morphology, originated from there two kinds of pore forming agents. The mechanical properties were investigated. The strength decreased considerably when small amount of whiskers were added, however, further increase in the whisker content only cause a moderate decrease of the strength. Gas permeability were measured for the samples with high whisker content of 60 vol% (corresponding to porosity of about 45% in the sintered bodies), and was compared with the counterpart contained the same porosity in which pores were equiaxial. The flexural strength of the samples with these two types of fugitive particles was almost the same, but the permeability of samples with rod-shaped pores were much higher than that with equiaxial pores, which can be understood in terms of a short pass model.

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