Densification behavior and mechanical properties of hot-pressed TiC–WC ceramics
| Autor: | Binta Hadi Jume, Chengyong Xu, Loke Kok Foong |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
010302 applied physics
Materials science Precipitation (chemistry) Process Chemistry and Technology Sintering 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Grain size Surfaces Coatings and Films Electronic Optical and Magnetic Materials Flexural strength visual_art 0103 physical sciences Vickers hardness test Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Ceramic Composite material 0210 nano-technology Porosity Solid solution |
| Zdroj: | Ceramics International. 46:28316-28323 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2020.07.335 |
| Popis: | The purpose of this paper was to investigate the influence of WC as a sintering aid on the sinterability and mechanical characteristics of TiC. For this purpose, two specimens, namely TiC-5 vol% WC and monolithic TiC, were manufactured using the hot-pressing route at 2000 °C for 2 h under 50 MPa. The addition of WC uplifted the sintering behavior of TiC. The XRD and microscopical evaluations revealed the precipitation of graphitized carbon in the TiC matrix. The results also manifested the complete dissolution of WC in the matrix, forming the (Ti,W)C solid solution. The addition of WC improved the Vickers hardness and flexural strength of TiC by ~12% and ~20%, respectively. Grain size, remaining porosity, and composition of the matrix were identified as the essential factors in boosting the mechanical properties of the TiC-WC specimen compared to the monolithic TiC. |
| Databáze: | OpenAIRE |
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