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Highly textured and strongly anisotropic TiB2 ceramics prepared using magnetic field alignment (9T)
Affiliation:1. Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 36, Bratislava, Slovakia;2. Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, 610031, China;3. Institute of Materials Research, Slovak Academy of Sciences, Watsonová 47, 040 01, Košice, Slovakia;4. Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 616 62, Brno, Czech Republic;5. School of Engineering & Materials Science, Queen Mary University of London, Mile End Road, London, E1 4NS, United Kingdom;1. Guangxi Universities Key Laboratory of Non-Ferrous Metal Oxide Electronic Functional Materials and Devices, Guilin University of Technology, Guilin, 541004, China;2. Materials Research Institute, Pennsylvania State University, University Park, State College, PA, 168001, USA;3. Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, New South Wales, NSW 2500, Australia;4. Electronic Materials Research Laboratory, Key Laboratory of the Ministry of Education and International Center for Dielectric Research, Xi’an Jiaotong University, Xi’an, 710049, China;5. Thin Film and Optical Manufacturing Technology Laboratory, Key Laboratory of Ministry of Education, Xi’an Technological University, Xi’an 710032, China;1. Department of Materials Engineering, School of Engineering, Tarbiat Modares University, Tehran, 14115-143, Iran;2. Empa, Swiss Federal Laboratories for Materials Science & Technology, Laboratory for High Performance Ceramics, 8600, Dübendorf, Switzerland;3. Empa, Swiss Federal Laboratories for Materials Science & Technology, Transport at Nanoscale Interfaces Laboratory, 8600, Dübendorf, Switzerland;4. Empa, Swiss Federal Laboratories for Materials Science & Technology, Laboratory of Materials for Energy Conversion, 8600, Dübendorf, Switzerland;1. Dielectrics, Ferroelectrics & Multiferroics Group, Faculty of Physics, “Al. I. Cuza” University, Bv. Carol 11, Iasi, 700506, Romania;2. GRADIENT SRL., Str. Codrescu, Nr.17, 700495, Iaşi, Romania;3. Research Department of the Faculty of Physics, “Al. I. Cuza” University, Bv. Carol 11, Iasi, 700506, Romania;4. Faculty of Chemistry, “Al. I. Cuza” University, Bv. Carol 11, Iasi, 700506, Romania;5. Inst.of Macromolecular Chemistry “Petru Poni”, Aleea Grigore Ghica Voda 41A, 700487, Iasi, Romania;1. Guangxi Key Laboratory of Optical and Electronic Materials and Devices, College of Material Science and Engineering, Guilin University of Technology, Guilin, 541004, China;2. College of Information Science and Engineering, Guilin University of Technology, Guilin, 541004, China;1. Quantum Structures and Device Lab, Materials Research Centre, Indian Institute of Science, Bangalore 560012, India;2. Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India;3. Laboratory for Multiscale eXperiments, Thin Films and Interfaces group, Paul Scherrer Institute, Villigen 5232, Switzerland;1. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, International School of Material Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
Abstract:Highly textured TiB2 ceramics were prepared by slip casting an aqueous suspension in a magnetic field of 9 T, followed by sintering using Field Assisted Sintering Technology (FAST). Particle size refinement by ball milling improved both the degree of texturing and densification of the material (RD > 98 %). The sintered material exhibited a Lotgering orientation factor of 0.90, with the c-axis of TiB2 oriented parallel to the magnetic field and FAST pressing direction. The texturing effect induced by the uniaxial pressing was negligible. The textured TiB2 material exhibited a significant anisotropy in mechanical properties; the values of hardness and indentation elastic modulus measured along directions transverse to the c-axis of TiB2 were 37 % and 13 % higher than the ones measured along the c-axis direction. Moreover, the specific wear rate of a surface of textured TiB2 parallel to the field was one order of magnitude lower than a surface perpendicular to the field.
Keywords:titanium diboride  Strong Magnetic Field Alignment (SMFA)  Field Assisted Sintering Technology (FAST)  texture  anisotropy
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