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Can I read In situ Si3N4–SiC–BN composites: preparation, microstructures and properties on EtoBox?
In situ Si3N4–SiC–BN composites: preparation, microstructures and properties by G.J. Zhang; J.F. Yang; T. Ohji is a Engineering article available to read on EtoBox.
What is In situ Si3N4–SiC–BN composites: preparation, microstructures and properties about?
Boron nitride composites in Si-B-C-N system have been widely studied and applied in industry in these decades. In the present investigation, in situ reaction process was used to fabricate a new kind of silicon nitride-silicon carbide-boron nitride (Si 3 N 4 -SiC-BN) composites according to a previously proposed reaction of Si 3 N 4 , B 4 C, and C with extra addition of Si 3 N 4 in the starting powder mixture. The composites were produced by hot pressing at 1800 °C in a nitrogen atmosphere. The obtained composites demonstrated relatively high density and high bending strength over those of conventionally-processed ones, although with increasing BN content the densification behavior became poorer especially for composites with BN contents higher than 25 vol.%. The growth of rodlike b-Si 3 N 4 grains was suppressed in the composites. Different from the previously reported SiC-BN in situ composites in which the strength almost kept unchanged when the BN content was lower than 35 vol.%, the strength of the present Si 3 N 4 -SiC-BN composites decreased monotonously with increase in BN content due to the decreased relative density and limited grain growth of rodlike b-Si 3 N 4 grains.
Who reads In situ Si3N4–SiC–BN composites: preparation, microstructures and properties?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- G.J. Zhang; J.F. Yang; T. Ohji
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0921-5093)
- Published
- 2002
- Language
- EN
- Field
- Engineering (Physical Sciences)