Investigation the effect of FeNiCoCrMo HEA addition on properties of B4C ceramic prepared by spark plasma sintering |
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| Affiliation: | 1. Department of Materials Science and Engineering, University of North Texas, Denton, TX 76207, USA;2. Center for Friction Stir Processing, University of North Texas, Denton, TX 76207, USA;3. QuesTek Innovations LLC, Evanston, IL 60201, USA;4. Advanced Materials and Manufacturing Processes Institute, University of North Texas, Denton, TX 76207, USA;1. State Key Laboratory of High-Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, 201800, No. 588, HeShuo Road, Jiading District, Shanghai, China;2. University of Chinese Academy of Sciences, Beijing, 100049, China;3. Nanjing Tech University, 30 Puzhu South Road, Pukou District, Nanjing, China |
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| Abstract: | In this study, monolithic B4C and B4C-based ceramics incorporating FeNiCoCrMo dual-phase (FCC and BCC) high entropy alloys (HEAs) were produced by spark plasma sintering (SPS). The effect of additives on the densification behavior, mechanical properties, microstructures, and phase evaluation of the samples were investigated. X-ray analysis confirmed the existence of FCC structured HEA and depletion of BCC structured HEA, after high-temperature reaction between B4C-HEAs. The addition of HEAs enhanced the densification behavior by liquid phase sintering. Furthermore, hardness and fracture toughness values of the samples increased with increasing HEAs content. Fracture toughness and hardness values for all composites were higher than the monolithic B4C. A combination of the highest density (～99.22 %) and the best mechanical properties (32.3 GPa hardness and 4.53 MPa m1/2 fracture toughness) was achieved with 2.00 vol.% HEA addition. |
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| Keywords: | Boron carbide High entropy alloy Spark plasma sintering Liquid phase sintering |
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