Laser fabrication nanocrystalline coatings using simultaneous powders/wire feed |
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| Institution: | 1. School of Materials Science and Engineering, Shandong Jianzhu University, Fengming Road #1000, Jinan 250101, PR China;2. Department of Chemical and Materials Engineering, University of Kentucky, Lexington, KY 40506, USA;3. Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, PR China;1. Department of Physics and Astronomy, University of Manitoba, Winnipeg, Canada R3T 2N2;2. Department of Physics/Theoretical Physics, University of Oulu, Oulu FIN-90014, Finland;1. School of Physical Electronics, Joint Laboratory for Police Equipment Research, University of Electronic Science and Technology of China, Chengdu 610054, PR China;2. School of Physics and Mech-tronic Engineering, Sichuan University of Arts and Science, Dazhou 635000, PR China;1. Department of Applied Physics, University for Development Studies, Navrongo, Ghana;2. Department of Physics, College of Agriculture and Natural Sciences, U.C.C., Ghana;3. Department of Mathematics, College of Agriculture and Natural Sciences, U.C.C., Ghana;1. Department of Solid State Physics, Yerevan State University, Alex Manoogian 1, 0025 Yerevan, Armenia;2. National University of Architecture and Construction of Armenia, Teryan 105, 0009 Yerevan, Armenia;3. Instituto de Alta Investigación, Universidad de Tarapacá, Casilla 7D, Arica, Chile;4. SUPA School of Physics and Astronomy, University of Glasgow, Glasgow G12 8QQ, United Kingdom;1. Department of Physics and Engineering, Moldova State University, Chisinau MD-2009, Republic of Moldova;2. Institute of Applied Physics, Moldavian Academy of Science, Chisinau MD-2028, Republic of Moldova;3. Gwangju Institute of Science and Technology, Gwangju 500-712, Republic of Korea |
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| Abstract: | Laser melting deposition (LMD) fabrication is used to investigate feasibilty of simultaneously feeding TC17 wire and the Stellite 20–Si3N4–TiC–Sb mixed powders in order to increase the utilization ratio of materials and also quality of LMD composite coatings on the TA1 substrate. SEM images indicated that such LMD coating with metallurgical joint to substrate was formed free of the obvious defects. Lots of the ultrafine nanocrystals (UNs) were produced, which distributed uniformly in some coating matrix location, retarding growth of the ceramics in a certain extent; UNs were intertwined with amorphous, leading the yarn-shape materials to be produced. Compared with substrate, an improvement of wear resistance was achieved for such LMD coating. |
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| Keywords: | Metal-matrix composites (MMCs) Surface properties Nanocrystalline materials Lasers |
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