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Effect of Additive Ti3SiC2 Content on the Mechanical Properties of B4C–TiB2 Composites Ceramics Sintered by Spark Plasma Sintering
- Source :
- Materials, Volume 13, Issue 20, Materials, Vol 13, Iss 4616, p 4616 (2020)
- Publication Year :
- 2020
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2020.
-
Abstract
- B4C&ndash<br />TiB2 composite ceramics with ultra-high fracture toughness were successfully prepared via spark plasma sintering (SPS) at 1900 &deg<br />C using B4C and Ti3SiC2 as raw materials. The results showed that compared with pure B4C ceramics sintered by SPS, the hardness of B4C&ndash<br />TiB2 composite ceramics was decreased, but the flexural strength and fracture toughness were significantly improved<br />the fracture toughness especially was greatly improved. When the content of Ti3SiC2 was 30 vol.%, the B4C&ndash<br />TiB2 composite ceramic had the best comprehensive mechanical properties: hardness, bending strength and fracture toughness were 27.28 GPa, 405.11 MPa and 18.94 MPa&middot<br />m1/2, respectively. The fracture mode of the B4C&ndash<br />TiB2 composite ceramics was a mixture of transgranular fracture and intergranular fracture. Two main reasons for the ultra-high fracture toughness were the existence of lamellar graphite at the grain boundary, and the formation of a three-dimensional interpenetrating network covering the whole composite.
- Subjects :
- Materials science
Composite number
Spark plasma sintering
Boron carbide
lcsh:Technology
Ti3SiC2
fracture toughness
chemistry.chemical_compound
Fracture toughness
Flexural strength
General Materials Science
boron carbide
Ceramic
Composite material
lcsh:Microscopy
lcsh:QC120-168.85
lcsh:QH201-278.5
lcsh:T
Transgranular fracture
Intergranular fracture
chemistry
lcsh:TA1-2040
visual_art
visual_art.visual_art_medium
lcsh:Descriptive and experimental mechanics
lcsh:Electrical engineering. Electronics. Nuclear engineering
lcsh:Engineering (General). Civil engineering (General)
lcsh:TK1-9971
spark plasma sintering
Subjects
Details
- Language :
- English
- ISSN :
- 19961944
- Database :
- OpenAIRE
- Journal :
- Materials
- Accession number :
- edsair.doi.dedup.....7fdb45481498e96ba0652cf00f4a8f40
- Full Text :
- https://doi.org/10.3390/ma13204616