Ultra-high temperature ceramics based on ZrB2 obtained by pressureless sintering with addition of Cr3C2, Mo2C,and WC |
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| Affiliation: | 1. Frantsevich Institute for Problems in Materials Science, 3 Krzhizhanovsky St., 03142 Kyiv, Ukraine;2. Institute of Materials Research, Slovak Academy of Sciences, Watsonova 47, 04 0 01 Kosice, Slovak Republic;1. Institute of Iron and Steel Technology, TU Bergakademie Freiberg, Germany;2. Institute of Ceramics, Refractories and Composite Materials, TU Bergakademie Freiberg, Germany;3. Institute of material Science, TU Bergakademie Freiberg, Germany;1. Department for Nanostructured Materials, Jo?ef Stefan Institute, Jamova 39,1000 Ljubljana, Slovenia;2. Jo?ef Stefan International Postgraduate School, Jamova 39, 1000 Ljubljana, Slovenia;3. Facultad de Ciencias Físicas, GFMC, Universidad Complutense de Madrid, 28040 Madrid, Spain;4. Laboratorio de Heteroestructuras con aplicación en spintrónica, Unidad asociadaUCM/CSIC, 28049 Madrid, Spain;5. Materials Science Institute of Madrid (ICMM), Consejo Superior de Investigaciones Científicas (CSIC), Sor Juana Inés de la Cruz 3, 28049 Madrid, Spain;6. Center for Electron Microscopy and Microanalysis, Jo?ef Stefan Institute, Jamova 39, 1000 Ljubljana, Slovenia;1. Guangxi Universities Key Laboratory of Non-ferrous Metal Oxide Electronic Functional Materials and Devices, Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Materials Science and Engineering, Guilin University of Technology, Guilin 541004, China;2. College of Science, Guilin University of Technology, Guilin 541004, China;3. College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang 443002, China;1. Functional Ceramics Laboratory, Department of Materials Science and Engineering, The University of Seoul, Seoul 02504, Republic of Korea;2. Electronic Convergence Materials Center, Advanced Materials Convergence R&D Division, Korea Institute of Ceramic Engineering and Technology, Jinju, Gyeongsangnam-do 52851, Republic of Korea;1. NPU-SAS Joint Research Center and NPU-QMUL Joint Research Institute, School of Materials Science and Engineering, Northwestern Polytechnical University, Xi’an 710072, China;2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China;3. Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China;1. School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, PR China;2. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, PR China;3. National Key Laboratory of Science and Technology on Advanced Composites in Special Environments, Harbin Institute of Technology, Harbin 150080, PR China;4. School of Materials Science and Engineering, Anhui Polytechnic University, Wuhu 241000, PR China |
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| Abstract: | ZrB2-MeC and ZrB2-19 vol% SiC-MexCy where Me=Cr, Mo, W were obtained by pressureless sintering. The capability to promote densification of ZrB2 and ZrB2-SiC matrices is the highest for WC and lowest for Cr3C2. The interaction between the components results in the formation of new phases, such as MeB (MoB, CrB, WB), a solid solution based on ZrC, and a solid solution based on ZrB2. The addition of Cr3C2 decreases the mechanical properties. On the other hand, the addition of Mo2C or WC to ZrB2-19 vol% SiC composite ceramics leads increased mechanical properties. Long-term oxidation of ceramics at 1500 °C for 50 h showed that, in binary ZrB2-MexCy, a protective oxide scale does not form on the surface thus leading to the destruction of the composite. On the contrary, triple composites showed high oxidation resistance, due to the formation of dense oxide scale on the surface, with ZrB2-SiC-Mo2C displaying the best performance. |
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| Keywords: | Pressureless sintering Oxidation resistance Mechanical properties |
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