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Effect of microstructure and grain boundary chemistry on slow crack growth in silicon carbide at ambient conditions
- Source :
- Journal of the European Ceramic Society, Journal of the European Ceramic Society, Elsevier, 2015, 35 (8), pp.2253--2260
- Publication Year :
- 2015
- Publisher :
- Elsevier BV, 2015.
-
Abstract
- Silicon carbide (SiC) is being used increasingly as a room temperature structural material in environments where moisture cannot always be excluded. Unfortunately, there have been almost no reports on slow crack growth (SCG) in SiC at room temperature. To address this gap, SCG in SiC was studied using constant stress rate and double torsion tests in water. SiC based materials were produced with a wide range of grain boundary chemistries and microstructures, which may affect their slow crack growth behaviour. To clarify the role of chemistry and microstructure respectively, solid state (SS) sintering with carbon and boron along with liquid phase (LP) sintering using oxides additives were used to produce materials with fine and coarse grains. The LP-SiC was three times more sensitive to SCG than SS-SiC materials. Moreover, the larger grained material with a higher toughness was less sensitive to SCG than the materials with fine grains.
- Subjects :
- SiC
Technology
Toughness
Materials science
Slow crack growth
PHASE
Materials Science
Sintering
chemistry.chemical_element
PROPAGATION
FRACTURE-TOUGHNESS
chemistry.chemical_compound
Fracture toughness
STRENGTH
Materials Chemistry
Silicon carbide
Ceramic
0912 Materials Engineering
Boron
Materials
ComputingMilieux_MISCELLANEOUS
Grain morphology
Science & Technology
Metallurgy
MECHANICAL-PROPERTIES
Microstructure
[PHYS.COND.CM-MS] Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
chemistry
CERAMICS
visual_art
GLASSES
[PHYS.COND.CM-MS]Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]
Ceramics and Composites
visual_art.visual_art_medium
DYNAMIC FATIGUE
Grain boundary
Materials Science, Ceramics
BEHAVIOR
Subjects
Details
- ISSN :
- 09552219
- Volume :
- 35
- Database :
- OpenAIRE
- Journal :
- Journal of the European Ceramic Society
- Accession number :
- edsair.doi.dedup.....281816b1542dbfebcad9394a84c689bd