Densification,microstructures, and mechanical properties of (Zr,Ti)(C,N) ceramics fabricated by spark plasma sintering |
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| Affiliation: | 1. School of Materials Science and Chemical Engineering, Harbin University of Science and Technology, Harbin 150040, China;2. Heilongjiang Provincial Key Laboratory of Light Metal Materials Modification and Green Forming Technology, Harbin University of Science and Technology, Harbin 150040, China;3. School of Materials Science and Engineering, Anhui University of Technology, Ma’anshan 243002, China;4. Key Laboratory of Advanced Structural-Functional Integration Materials & Green Manufacturing Technology, Harbin Institute of Technology, Harbin 150001, China;1. State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083, China;2. Shenzhen Research Institute, Central South University, Shenzhen 518057, China;1. CNR-ISTEC, Inst. of Science and Technology for Ceramics, Via Granarolo 64, 48018 Faenza, Italy;2. INFN – Laboratori Nazionali di Legnaro, Viale dell’Università 2, 35020 Legnaro, Italy;3. Department of Industrial Engineering, University of Padova, Via Venezia 1, 35131 Padova, Italy;1. Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 04001 Kosice, Slovakia;2. CAN Superconductors, Ringhofferova 66, 251 68 Kamenice, Czech Republic;3. Faculty of Chemical Technology, University of Chemistry and Technology, Technicka 5, 166 28 Prague 6, Czech Republic;1. Department of Physics, Faculty of Sciences and Letters, Çukurova University, 01330 Adana, Turkey;2. INMA (CSIC-Universidad de Zaragoza), Maria de Luna, 50018 Zaragoza, Spain;1. Team Cardamom - INRIA, Univ. Bordeaux, CNRS, Bordeaux INP, IMB, UMR 5251, 200 Avenue de la Vieille Tour, Talence Cedex 33405, France;2. CNRS, Laboratoire des Composites ThermoStructuraux (LCTS), UMR 5801 CNRS, Univ. Bordeaux, CEA, Safran, 3, Allée de La Boétie, Pessac 33600, France;3. Laboratoire des Composites ThermoStructuraux (LCTS), UMR 5801 CNRS, Univ. Bordeaux, CEA, Safran, 3, Allée de La Boétie, Pessac 33600, France;1. Department of Aerospace Engineering, the Pennsylvania State University, University Park, PA16802, USA;2. NASA Glenn Research Center, Cleveland, OH 44135, USA;3. Applied Research Laboratory, the Pennsylvania State University, University Park, PA 16802, USA |
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| Abstract: | Dense (Zr, Ti) (C, N) ceramics were fabricated by spark plasma sintering (SPS) at 1900–2000 °C using ZrC, TiCN and ZrH2 powders as raw materials. A single Zr-rich (Zr, Ti)(C, N) solid solution was formed in Zr0.95Ti0.05C0.975N0.025 and Zr0.80Ti0.20C0.90N0.10 ceramics (nominal composition). A Ti-rich solid solution appears in Zr0.50Ti0.50C0.75N0.25 ceramics. The coaddition of TiCN and ZrH2 promoted the densification of (Zr, Ti) (C, N) ceramics by forming solid solutions and carbon vacancies, which could reduce critical resolved shear stress (CRSS) and promote carbon and metal atom diffusion. ZrC-45 mol% TiCN-10 mol% ZrH2 (raw powder composition) possesses good comprehensive mechanical properties (Vickers hardness of 24.5 ± 0.9 GPa, flexural strength of 503 ± 51 MPa, and fracture toughness of 4.3 ± 0.2 MPa·m1/2), which reach or exceed most ZrC-based (Zr, Ti) C and (Zr, Ti) (C, N) ceramics in previous reports. |
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| Keywords: | Zirconium carbide Titanium carbonitride Solid solution Mechanical properties Spark plasma sintering |
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