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Spark plasma sinterability and thermal diffusivity of TiN ceramics with graphene additive.
- Source :
-
Ceramics International . Apr2021:Part A, Vol. 47 Issue 7, p10057-10062. 6p. - Publication Year :
- 2021
-
Abstract
- The effects of adding graphene nano-platelets (6 wt%) on the microstructure and thermal diffusivity and conductivity of TiN-based ceramics were investigated. Two samples, a monolithic TiN, and a graphene-added TiN ceramics were fabricated using spark plasma sintering technique at 1900 °C for 7 min under 40 MPa. The microstructure of the polished and fractured surfaces of both samples was analyzed by scanning electron microscopy. Adding graphene resulted in a 2% reduction in the relative density, but led to obtaining a fine-grained microstructure. The consumption of graphene nano-additive during the sintering, through the reduction of surface oxide layers of TiN matrix (TiO 2), and consequently, the formation of titanium carbonitride (TiN 0 · 8 C 0.2) were disclosed by X-ray diffraction analysis. The measurement of the thermal diffusivity was done using the laser flash technique. The TiN–6 wt% graphene sample obtained lower thermal conductivity compared to the monolithic TiN, which can be attributed to the smaller grain size of the graphene-added sample. [ABSTRACT FROM AUTHOR]
- Subjects :
- *THERMAL diffusivity
*THERMAL plasmas
*CERAMICS
*GRAPHENE
*TIN
*THERMAL conductivity
Subjects
Details
- Language :
- English
- ISSN :
- 02728842
- Volume :
- 47
- Issue :
- 7
- Database :
- Academic Search Index
- Journal :
- Ceramics International
- Publication Type :
- Academic Journal
- Accession number :
- 148988234
- Full Text :
- https://doi.org/10.1016/j.ceramint.2020.12.152