Improvement in microstructure and mechanical properties of Ti(C, N) cermet prepared by two-step spark plasma sintering
| Autor: | Juntang Yuan, Jiadong Ye, Kui Liu, Weiwei Xu, Shiyu Yan, Zengbin Yin |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Toughness Materials science Process Chemistry and Technology Spark plasma sintering Sintering 02 engineering and technology Cermet 021001 nanoscience & nanotechnology Microstructure 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Fracture toughness Flexural strength 0103 physical sciences Vickers hardness test Materials Chemistry Ceramics and Composites Composite material 0210 nano-technology |
| Zdroj: | Ceramics International. 45:752-758 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2018.09.241 |
| Popis: | A fine grained Ti(C, N) cermet tool material was prepared by two-step spark plasma sintering. Microstructure evolution and densification mechanisms of Ti(C, N) during spark plasma sintering were studied. Effect of two-step sintering process and Ni content on microstructure and mechanical properties were also investigated. The critical activated densification temperature of Ti(C, N) is about 1300 ℃, and the rapidest densification rate takes place at 1300 ℃~1400 ℃. Grains are in the size of 1 µm when the Ti(C, N) cermet was prepared by two-step spark plasma sintering. The optimal flexural strength, fracture toughness and Vickers hardness are 1094 ± 42 MPa, 7.2 ± 0.5 MPa m1/2 and 18.3 ± 0.4 GPa, respectively. The Ti(C, N) cermets containing more content of Ni have higher toughness, which is due to the remarkable toughening effect of crack bridging by large grains. |
| Databáze: | OpenAIRE |
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