The influence of powder characteristics on mechanical properties of Al2O3–TiC–Co ceramic materials prepared by Co‐coated Al2O3/TiC powders |
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| Affiliation: | 1. Department of Mechanical Engineering, Taizhou University, Taizhou 318000, China;2. College of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China;3. Department of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China;1. Department of Clinical Emergencies, University of São Paulo School of Medicine, São Paulo 01409-001, Brazil;2. Digestive Surgery Division, Department of Gastroenterology, University of São Paulo School of Medicine, São Paulo 05403-900, Brazil;3. Department of Pathology, Hospital Sírio-Libanês, São Paulo 01308-050, Brazil;4. Department of Radiology, Hospital Sírio-Libanês, São Paulo 01308-050, Brazil;1. Lodz University of Technology, Department of Automation, Biomechanics and Mechatronics, 1/15 Stefanowski Street, 90-924 Lodz, Poland;2. Warsaw University of Technology, Department of Vehicles, 84 Narbutta Street, 02-524 Warsaw, Poland;3. Saratov State Technical University, Faculty of Architecture and Civil Engineering, Politehnicheskaya 77, 410054 Saratov, Russian Federation;4. Nizhny Novgorod State University, NIIM, 23 Gagarin Avenue, 603600 Nizhny Novgorod, Russian Federation;5. Saratov State Technical University, Department of Mathematics and Modeling, Politehnicheskaya 77, 410054 Saratov, Russian Federation;1. Department of Medical Services and Techniques, Bayburt Vocational High School of Health Services, Bayburt University, 69000, Bayburt, Turkey;2. Department of Mathematics and Science Education, Faculty of Education, Bayburt University, 69000, Bayburt, Turkey;3. Department of Physics, Faculty of Arts and Sciences, Recep Tayyip Erdogan University, 53100, Rize, Turkey;4. Department of Energy Systems Engineering, Faculty of Engineering and Architecture, Sinop University, 57000, Sinop, Turkey;5. Department of Physics, Faculty of Science, Karadeniz Technical University, 61080, Trabzon, Turkey;1. IME, TU Bergakademie Freiberg, Gustav-Zeuner-Str. 5, 09599 Freiberg, Germany;2. Zenker-Consult Mittweida, 09648 Mittweida, Germany |
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| Abstract: | Ultrafine Al2O3–TiC–Co (ATC) ceramic is prepared in order to improve the bending strength and fracture toughness of ceramic materials. The ultrafine Co‐coated Al2O3 and TiC powders have been synthesized by electroless plating at room temperature, and the composite powders were sintered by hot‐pressing to compact ATC samples. The average bending strength, average hardness and average fracture toughness values of ATC ceramic with different particle sizes and Co contents were investigated. The toughening mechanism of the ultrafine ATC ceramic was studied by transmission electron microscopy (TEM) and ceramic performance testing methods. The results show that the relative density, bending strength and fracture toughness values increase remarkably with the increase of Co content. The ultrafine grain of original powders is beneficial to improve the relative density, strength and toughness values of ATC ceramic. The Co phase hinders the growth of ATC ceramic grains during sintering. The Co phase forms a three‐dimensional mesh skeleton structure during sintering, improving the fracture toughness and strength of the composite ceramic. |
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