B4C/SiC ceramic hollow microspheres prepared by slurry-coating and precursor conversion method |
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| Affiliation: | 1. State Key Laboratory of Automotive Simulation and Control, Jilin University, PR China;2. Key Laboratory of Automobile Materials (Ministry of Education), School of Materials Science and Engineering, Jilin University, No. 5988 Renmin Street, Changchun, 130022, PR China;1. Materials Engineering Department, Tarbiat Modares University, Tehran, Iran;2. Department of Electrical Engineering and Computer Science & Research Center MANSID, Stefan Cel Mare University, Suceava, Romania;1. Bayreuth Engine Research Center (BERC), Department of Functional Materials, University of Bayreuth, 95440 Bayreuth, Germany;2. Institute of Energy Research and Physical Technologies, Clausthal University of Technology, 38640 Goslar, Germany;1. M&I Materials, Hibernia Way, Trafford Park, Stretford, Manchester, M32 0ZD, UK;2. Department of Materials, University of Manchester, Oxford Road, Manchester, M13 9PL, UK;1. Materials and Metallurgy Department, Elms Road, The University of Birmingham, Edgbaston, West Midlands, England, B15 2TT, United Kingdom;2. LiME Training Centre, Brunel University London, Kingston Lane, Uxbridge, Middlesex, England, UB8 3PH, United Kingdom;3. ENSICAEN, Normandy University, Boulevard Maréchal Juin, Caen, 14000, France |
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| Abstract: | In this work, a new approach to fabricate B4C/SiC ceramic hollow microsphere was established through combination of slurry-coating and precursor conversion method. Firstly, different slurries were prepared using modified B4C powder with addition of PCS and LPCS. Subsequently, slurry was coated on a POM microsphere, followed by crosslinking, POM decomposition and heat-treatment at 1100 °C. Finally, the B4C/SiC hollow microspheres with average diameter of 1.6–1.9 mm and thickness of 10–60 μm were obtained. The roughness (Ra) of outer surface was as low as 40.3 nm with high sphericity of 99.6%. Deoxidation was also explored by heat treatment at 1700 °C. The oxygen content was decreased from 11.06 wt.% to 0.37 wt.%, and crush load was promoted from 1.73 N to 4.50 N. The preparative method of B4C/SiC ceramic hollow microspheres in this work can be easily extended for large-scale production. |
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| Keywords: | SiC Hollow microsphere Precursor conversion method Slurry-Coating method |
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