Flexural strength and toughness of liquid phase sintered silicon carbide
| Autor: | Gian Loris Minoccari, Luigi Pilotti, Giuseppe Magnani |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Toughness
Materials science Process Chemistry and Technology Liquid phase Sintering Surfaces Coatings and Films Electronic Optical and Magnetic Materials Grain growth chemistry.chemical_compound Fracture toughness Flexural strength chemistry Indentation Materials Chemistry Ceramics and Composites Silicon carbide Composite material |
| Zdroj: | Ceramics International. 26:495-500 |
| ISSN: | 0272-8842 |
| Popis: | Liquid phase sintering process of silicon carbide allows the obtaining of a dense sample at lower temperature than the solid state process with reduced grain growth and improved mechanical properties. In this paper mechanical properties at RT (room temperature) and at high temperature of liquid phase sintered silicon carbide (LPSSC) was determined. Flexural strength measurements were conducted by means of four-point bend tests in the range RT–1400°C. Hardness and fracture toughness were determined by Vickers indentation method at different load. Flexural strength changed from 532 MPa at RT to 240 MPa at 1400°C. SEM analysis showed that this behaviour is due to superficial oxidation of SiC and formation of yttrium silicate which create bubbles and cavities. |
| Databáze: | OpenAIRE |
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