Abstract
Ti-TiC composite materials were produced by spark plasma sintering (SPS) and electric discharge sintering (EDS) of spherical Ti powders with surface-embedded TiC. Hardness (HIT) and reduced elastic modulus (Er) were estimated using the nanoindentation method with an applied load of 100 mN, and compared with the micro-Vickers hardness value. The microstructure of SPS composite compacts revealed that the TiC particles were uniformly distributed only along the Ti particle boundary. On the other hand, for the EDS composite compacts, the strip-like TiC particles of 1–2.5 µm in size were homogeneously dispersed in the Ti matrix, indicating that the discontinuous and randomly orientated TiC can more efficiently impede the plastic flow of the matrix phase of Ti. The micro-Vickers and nanoindentation hardness for the SPS composite compacts slightly increased with increased TiC content from 0 to 20 wt%, the increments of which were about 67 Hv and 0.7 GPa, respectively. Meanwhile, the EDS composite compacts exhibited significantly higher micro-Vickers and nanoindentation hardness with the increment of 653 Hv and 6.5 GPa, respectively. This result was ascribed to the TiC particles uniformly dispersed across the Ti matrix. Accordingly, the ratio values, such as HIT/Er and HIT 3/Er 2, were also significantly higher for the EDS composite compacts at all the range of TiC content due to stiffening and hardening effects derived from the TiC reinforcement. Therefore, the better incorporation of the TiC in the Ti matrix significantly improved the hardness and wear properties of the Ti composite reinforced with TiC produced by EDS compared with the SPS process.
| Original language | English |
|---|---|
| Journal | Ceramics International |
| DOIs | |
| Publication status | Published - 2019 Jan 1 |
Fingerprint
Keywords
- Composite
- Electric discharge sintering
- Spark plasma sintering
- Titanium
- Titanium carbide
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Process Chemistry and Technology
- Surfaces, Coatings and Films
- Materials Chemistry
Cite this
Synthesis of TiC reinforced Ti matrix composites by spark plasma sintering and electric discharge sintering : A comparative assessment of microstructural and mechanical properties. / Lee, W. H.; Seong, J. G.; Yoon, Y. H.; Jeong, C. H.; Van Tyne, C. J.; Lee, Haigun; Chang, S. Y.
In: Ceramics International, 01.01.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Synthesis of TiC reinforced Ti matrix composites by spark plasma sintering and electric discharge sintering
T2 - A comparative assessment of microstructural and mechanical properties
AU - Lee, W. H.
AU - Seong, J. G.
AU - Yoon, Y. H.
AU - Jeong, C. H.
AU - Van Tyne, C. J.
AU - Lee, Haigun
AU - Chang, S. Y.
PY - 2019/1/1
Y1 - 2019/1/1
N2 - Ti-TiC composite materials were produced by spark plasma sintering (SPS) and electric discharge sintering (EDS) of spherical Ti powders with surface-embedded TiC. Hardness (HIT) and reduced elastic modulus (Er) were estimated using the nanoindentation method with an applied load of 100 mN, and compared with the micro-Vickers hardness value. The microstructure of SPS composite compacts revealed that the TiC particles were uniformly distributed only along the Ti particle boundary. On the other hand, for the EDS composite compacts, the strip-like TiC particles of 1–2.5 µm in size were homogeneously dispersed in the Ti matrix, indicating that the discontinuous and randomly orientated TiC can more efficiently impede the plastic flow of the matrix phase of Ti. The micro-Vickers and nanoindentation hardness for the SPS composite compacts slightly increased with increased TiC content from 0 to 20 wt%, the increments of which were about 67 Hv and 0.7 GPa, respectively. Meanwhile, the EDS composite compacts exhibited significantly higher micro-Vickers and nanoindentation hardness with the increment of 653 Hv and 6.5 GPa, respectively. This result was ascribed to the TiC particles uniformly dispersed across the Ti matrix. Accordingly, the ratio values, such as HIT/Er and HIT 3/Er 2, were also significantly higher for the EDS composite compacts at all the range of TiC content due to stiffening and hardening effects derived from the TiC reinforcement. Therefore, the better incorporation of the TiC in the Ti matrix significantly improved the hardness and wear properties of the Ti composite reinforced with TiC produced by EDS compared with the SPS process.
AB - Ti-TiC composite materials were produced by spark plasma sintering (SPS) and electric discharge sintering (EDS) of spherical Ti powders with surface-embedded TiC. Hardness (HIT) and reduced elastic modulus (Er) were estimated using the nanoindentation method with an applied load of 100 mN, and compared with the micro-Vickers hardness value. The microstructure of SPS composite compacts revealed that the TiC particles were uniformly distributed only along the Ti particle boundary. On the other hand, for the EDS composite compacts, the strip-like TiC particles of 1–2.5 µm in size were homogeneously dispersed in the Ti matrix, indicating that the discontinuous and randomly orientated TiC can more efficiently impede the plastic flow of the matrix phase of Ti. The micro-Vickers and nanoindentation hardness for the SPS composite compacts slightly increased with increased TiC content from 0 to 20 wt%, the increments of which were about 67 Hv and 0.7 GPa, respectively. Meanwhile, the EDS composite compacts exhibited significantly higher micro-Vickers and nanoindentation hardness with the increment of 653 Hv and 6.5 GPa, respectively. This result was ascribed to the TiC particles uniformly dispersed across the Ti matrix. Accordingly, the ratio values, such as HIT/Er and HIT 3/Er 2, were also significantly higher for the EDS composite compacts at all the range of TiC content due to stiffening and hardening effects derived from the TiC reinforcement. Therefore, the better incorporation of the TiC in the Ti matrix significantly improved the hardness and wear properties of the Ti composite reinforced with TiC produced by EDS compared with the SPS process.
KW - Composite
KW - Electric discharge sintering
KW - Spark plasma sintering
KW - Titanium
KW - Titanium carbide
UR - http://www.scopus.com/inward/record.url?scp=85061081870&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85061081870&partnerID=8YFLogxK
U2 - 10.1016/j.ceramint.2019.01.062
DO - 10.1016/j.ceramint.2019.01.062
M3 - Article
JO - Ceramics International
JF - Ceramics International
SN - 0272-8842
ER -