SiC/Si3N4 nano/micro-composite : processing, RT and HT mechanical properties

Two SiC/Si3N4 nano/micro composites were prepared from a starting mixture of crystalline alpha-Si3N4, amorphous SiNC, Y2O3 and/or Al2O3. The composite material for room temperature (RT) application has high strength of 1200 MPa, Weibull modulus of 19 and moderate fracture toughness of 7 MPa.m1/2. Th...

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Published inJournal of the European Ceramic Society Vol. 20; no. 4; pp. 453 - 462
Main Authors SAJGALIK, P, HNATKO, M, LOFAJ, F, HVIZDOS, P, DUSZA, J, WARBICHLER, P, HOFER, F, RIEDEL, R, LECOMTE, E, HOFFMANN, M. J
Format Journal Article
LanguageEnglish
Published Oxford Elsevier 01.04.2000
Subjects
Applied sciences
Building materials. Ceramics. Glasses
Ceramic industries
Chemical industry and chemicals
Exact sciences and technology
Structural ceramics
Technical ceramics
Mechanical properties
Dispersion reinforced material
Creep strength
High temperature
Experimental study
Composite material
Non oxide ceramics
Structural ceramic
Bending strength
Silicon Carbides
Silicon Nitrides
Nanocomposite
Manufacturing
Microstructure
Room temperature
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Summary:Two SiC/Si3N4 nano/micro composites were prepared from a starting mixture of crystalline alpha-Si3N4, amorphous SiNC, Y2O3 and/or Al2O3. The composite material for room temperature (RT) application has high strength of 1200 MPa, Weibull modulus of 19 and moderate fracture toughness of 7 MPa.m1/2. The composite for high temperature (HT) application, without Al2O3, has RT strength of 710 MPa and is able to keep 60% of its RT strength up to 1300 C. The creep resistance is approximately 1 order higher compared to the relative monolith up to 1400C. 19 refs.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:0955-2219
DOI:10.1016/s0955-2219(99)00176-4