Effect of boron carbide additive and sintering temperature - Dwelling time on silicon carbide properties
| Autor: | Richard A. Haber, Vincent A. DeLucca, Zeynep Aygüzer Yaşar |
|---|---|
| Přispěvatelé: | [Belirlenecek] |
| Rok vydání: | 2021 |
| Předmět: |
Boron carbide content
Materials science Sintering Spark plasma sintering chemistry.chemical_element Silicon carbide 02 engineering and technology Boron carbide 01 natural sciences chemistry.chemical_compound 0103 physical sciences Materials Chemistry Ceramic Composite material Microstructure 010302 applied physics Bulk modulus Argon Process Chemistry and Technology Elastic properties 021001 nanoscience & nanotechnology Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry visual_art Ceramics and Composites visual_art.visual_art_medium 0210 nano-technology |
| Zdroj: | Ceramics International. 47:7177-7182 |
| ISSN: | 0272-8842 0006-1522 |
| DOI: | 10.1016/j.ceramint.2020.11.071 |
| Popis: | Sintering temperature and composition are two important factors that affect the properties of ceramic materials. In this study, the effects of sintering temperature, dwelling time, intermediate dwell, and B4C content on the density, microstructure, and elastic properties of dense SiC ceramics were investigated. 1.5 wt% C and 0.25 wt% or 0.5 wt% B4C were added to SiC which was spark plasma sintered (SPS) at 1900 degrees C, 1950 degrees C, or 2000 degrees C under a pressure of 50 MPa in flowing argon with an intermediate dwell at 1400 degrees C (for 1 or 30 min). The results of the sintering study showed that the best microstructure was obtained in the sample sintered at 1900 degrees C for 10 min with an intermediate dwell at 1400 degrees C for 30 min. Under these conditions, the sintered sample has reached full density (>99%) with elastic, shear and bulk modulus values of 436 GPa, 184 GPa and 233 GPa, respectively. In addition, it was observed that 0.5 wt% B4C content gave preferred results over 0.25 wt% B4C content. These conditions allow the production of fully dense silicon carbide ceramics with fine-grained microstructure. National Science Foundation I/UCRC AwardNational Science Foundation (NSF) [1540027]; Materials for Extreme Dynamic Environments program - US Army Research Laboratory [W911NF-12-2-0022]; Ministry of National Education of the Republic of TurkeyMinistry of National Education - Turkey Research was sponsored by the National Science Foundation I/UCRC Award No.1540027. The views and conclusions contained in this document are those of the authors and should not be interpreted as representing the official policies, either expressed or implied, of the National Science Foundation or the U.S. Government. The U.S. Government is authorized to reproduce and distribute reprints for Government purposes notwithstanding any copyright notation herein. Additional funding was provided by the Materials for Extreme Dynamic Environments program sponsored by the US Army Research Laboratory Cooperative Agreement (W911NF-12-2-0022). Zeynep Ayguzer Yasar acknowledges the graduate scholarship from the Ministry of National Education of the Republic of Turkey. WOS:000615226700003 |
| Databáze: | OpenAIRE |
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