scholarly journals Evaluations of bending strength and fracture toughness by indentation method in silicon carbide ceramics.

1990 ◽  
Vol 39 (442) ◽  
pp. 895-900
Author(s):  
Shigemi K. SASAKI ◽  
Yasuo OCHI ◽  
Akira ISHII ◽  
Makoto KAWAI ◽  
Sunao KURAKAZU
Keyword(s):  
Fracture Toughness ◽  
Silicon Carbide ◽  
Bending Strength ◽  
Indentation Method ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics

Microstructure and Mechanical Properties of Heat-Resistant Silicon Carbide Ceramics

2007 ◽  
Vol 336-338 ◽  
pp. 1409-1413 ◽  
Author(s):  
Young Wook Kim ◽  
Yong Seong Chun ◽  
Sung Hee Lee ◽  
Ji Yeon Park ◽  
Toshiyuki Nishimura ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Silicon Carbide ◽  
Intergranular Phase ◽  
Sintering Additives ◽  
Heat Resistant ◽  
Sic Ceramics ◽  
Microstructure And Mechanical Properties ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics

There has been a great progress in the development of heat-resistant silicon carbide ceramics, owing to the better understanding of composition-microstructure-properties relations. Based on the progress, it has been possible to fabricate heat-resistant SiC ceramics with improved fracture toughness. In this paper, three rare-earth oxides (Re2O3, Re=Er, Lu, and Sc) in combination with AlN were used as sintering additives for a β-SiC containing 1 vol% α-SiC seeds. The effect of intergranular phase, using Re2O3 and AlN as sintering additives, on the microstructure and mechanical properties of liquid-phasesintered, and subsequently annealed SiC ceramics were investigated. The microstructure and mechanical properties were strongly influenced by the sintering additive composition, which determines the chemistry and structure of IGP. The strength and fracture toughness of the Lu2O3-doped SiC were ∼700 MPa at 1400oC and ∼6 MPa.m1/2 at room temperature, respectively. The beneficial effect of the new additive compositions on high-temperature strength was attributed to the crystallization of the intergranular phase.

scholarly journals Environment-Friendly Preparation of Reaction-Bonded Silicon Carbide by Addition of Boron in the Silicon Melt

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1090
Author(s):  
Maoqiang Rui ◽  
Yaxiang Zhang ◽  
Jing Ye
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Bending Strength ◽  
Sintering Temperature ◽  
Argon Atmosphere ◽  
Environment Friendly ◽  
Silicon Melt ◽  
Different Temperatures ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics

Reaction-bonded silicon carbide ceramics were sintered by infiltration of Si and B–Si alloy under an argon atmosphere at different temperatures. The element boron was added to the silicon melt to form a B–Si alloy first. The mechanical properties of samples were improved by infiltration of the B–Si melt. The samples infiltrated with the Si-only melt were found to be very sensitive to experimental temperature. The bending strengths of 58.6 and 317.0 MPa were achieved at 1530 and 1570 °C, respectively. The sample made by infiltration of B–Si alloy was successfully sintered at 1530 °C. The relative density of the sample was more than 90%. The infiltration of B–Si alloy reduced the sintering temperature and the bending strength reached 326.9 MPa. The infiltration mechanism of B–Si alloy is discussed herein.

Effects of Additives Content on the Properties of Porous SiC Ceramics

2016 ◽  
Vol 868 ◽  
pp. 89-94
Author(s):  
Rong Li ◽  
Rong Zhen Liu ◽  
Gao Jian Liu ◽  
Zhi Hao Jin
Keyword(s):  
Silicon Carbide ◽  
Melting Point ◽  
Porous Silicon ◽  
Bending Strength ◽  
Porous Silicon Carbide ◽  
Sic Ceramics ◽  
Proportional Relationship ◽  
Carbide Ceramics ◽  
Porous Sic ◽  
Silicon Carbide Ceramics

The porous silicon carbide ceramics were fabricated by adding a variety of low melting point oxides in this paper. The additives were mullite, magnesium oxide, calcium oxide, and vanadium oxide. Effects of the additives content on the properties of porous silicon carbide ceramics were studied. The results showed that, when the additives content was greater than 2.8%, the apparent porosity, the bending strength, the permeability and the pore size were in an inversely proportional relationship with the additives content, while the content was less than 2.8%, proportional relationship was observed. When the additives content reached 2.8%, the porous SiC ceramics showed the best performances.

scholarly journals IMPROVING ENERGY EFFICIENCY OF SILICON CARBIDE CERAMICS PRODUCTION BY BATCH REGULATION

2015 ◽  
Vol 3 ◽  
pp. 461-467
Author(s):  
Dmitriy Zhukov ◽  
Nikolay Makarov ◽  
Maria Vartanyan ◽  
Tatiana Guseva
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Energy Efficiency ◽  
Silicon Carbide ◽  
Mechanical Behavior ◽  
Efficient Method ◽  
Energy Efficient ◽  
Dense Material ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics

The article discusses an energy-efficient method for producing SiC-based composites via doping with oxide eutectic compositions and batch granulometry regulation. The influence of batch granulometry on physico-mechanical properties of ceramics is studied, and fractions ratio is determined allowing us to obtain a dense material with improved strength and fracture toughness. Such ceramics shows excellent mechanical behavior and holds much promise as a structural and armor material.

scholarly journals Sintered Alpha Silicon Carbide Ceramics for High Temperature Structural Application: Status Review and Recent Developments

1985 ◽  
Author(s):  
R. S. Storm ◽  
W. D. G. Boecker ◽  
C. H. McMurtry ◽  
M. Srinivasan
Keyword(s):  
Fracture Toughness ◽  
Silicon Carbide ◽  
Composite Material ◽  
High Temperature ◽  
Physical Properties ◽  
Heat Engine ◽  
Structural Application ◽  
Recent Developments ◽  
Carbide Ceramics ◽  
Silicon Carbide Ceramics

The physical properties of sintered alpha silicon carbide are reviewed, including the effect of oxidation at high temperatures. Net shape fabricated components are described which have undergone extensive testing in heat engine applications. Properties of an SiC/TiB2 composite material, which has significantly improved fracture toughness, are presented.

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