W-ZrC composites prepared by reactive melt infiltration of Zr2Cu alloy into partially carburized W preforms |
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| Affiliation: | 1. Department of Chemical Engineering Technology, University of Johannesburg, Johannesburg, South Africa;2. Department of Materials Science and Engineering, Obafemi Awolowo University, Ile–Ife, Nigeria;3. Department of Metallurgical and Materials Engineering, Federal University of Technology, Akure, Nigeria;4. Department of Chemical, Metallurgical and Materials Engineering, Tshwane University of Technology, Pretoria West, South Africa;1. Ukrainian State University of Railway Transport, pl. Feyerbaha 7, Kharkov 61010, Ukraine;2. National Technical University "Kharkov Polytechnic Institute", 21 Frunze Str., Kharkov 61002, Ukraine;3. Kazimierz Pulaski University of Technology and Humanities in Radom, 54 Krasickiego Str., 26-600 Radom, Poland;1. Art & Architecture Faculty, Yadegar-e Imam Khomeini (RAH) Shahre-Rey Branch, Islamic Azad University, Tehran, Iran;2. Faculty of Materials & Manufacturing Processes, Malek-Ashtar University of Technology, Tehran, Iran;1. Element Six GmbH, Städeweg 12 – 24, 36151 Burghaun, Germany;2. National University of Science and Technology MISiS, Leninsky pr. 4, Moscow 119049, Moscow, Russia;3. Central Facility for Electron Microscopy, RWTH Aachen University, Ahornstr. 55, D-52074 Aachen, Germany;4. Institute of Solid State Physics, Chernogolovka, Russia;5. Karlsruhe Institute of Technology, Eggenstein-Leopoldshafen, Germany |
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| Abstract: | W-ZrC composites without residual WC have been prepared for the first time by reactive infiltration at 1300 °C for 1 h in vacuum using a molten Zr2Cu alloy and a newly designed partially-carburized W powder as raw materials. The as-synthesized composites consist of two major phases of W and ZrC, in which the content of W is 65 vol%. The reaction time needed to produce a fully densified W-ZrC bulk ceramic is distinctly shortened by this means, as contrasted with conventional WC/W or WC preforms. The microstructural evolution during reactive melt infiltration is investigated to obtain a better understanding of reaction mechanisms and mechanical properties of the W-ZrC composites derived by infiltrating Zr2Cu alloy into partially carburized W preforms. The flexural strength, Young's modulus and fracture toughness for the W-ZrC composite are 554 MPa, 339 GPa and 9.7 MPa·m1/2, respectively. |
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