17
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found

      Oxidation resistance and wettability of graphite/SiC composite

      research-article

      Read this article at

      ScienceOpenPublisher
      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          A graphite/SiC composite was synthesized at different calcination temperatures using microsilica and carboxymethylated cellulose. The oxidation resistance and wettability (with water) of graphite/SiC were investigated. The results showed that carboxymethylated cellulose could react with microsilica to form a coating of SiC on the surface of graphite at elevated temperatures. Consequently, SiO 2 phase was converted into SiC phase above 1 600 °C. The microstructure of the SiC coating on graphite became denser with the increase in temperature. Thermogravimetric curves revealed that the weight loss of graphite was approximately 97.3 wt.% whereas the value decreased to 29.78 wt.% when SiC was formed. Differential scanning calorimetry analysis showed that the SiC coating decreased the enthalpy of the carbon oxidation reaction from 12.02 kJ g −1 to 1.14 kJ g −1, confirming excellent oxidation resistance. Furthermore, the water contact angle of graphite was approximately 78.5° whereas that of the graphite/SiC composite was reduced to 43°. The study of the formation of graphite/SiC composite showed that SiO 2 could be reduced using carboxymethylated cellulose to SiO (g), which was deposited on the graphite to form SiC coating.

          Most cited references1

          • Record: found
          • Abstract: found
          • Article: found

          Oxidation resistance and wettability of graphite/SiC composite

          A graphite/SiC composite was synthesized at different calcination temperatures using microsilica and carboxymethylated cellulose. The oxidation resistance and wettability (with water) of graphite/SiC were investigated. The results showed that carboxymethylated cellulose could react with microsilica to form a coating of SiC on the surface of graphite at elevated temperatures. Consequently, SiO 2 phase was converted into SiC phase above 1 600 °C. The microstructure of the SiC coating on graphite became denser with the increase in temperature. Thermogravimetric curves revealed that the weight loss of graphite was approximately 97.3 wt.% whereas the value decreased to 29.78 wt.% when SiC was formed. Differential scanning calorimetry analysis showed that the SiC coating decreased the enthalpy of the carbon oxidation reaction from 12.02 kJ g −1 to 1.14 kJ g −1 , confirming excellent oxidation resistance. Furthermore, the water contact angle of graphite was approximately 78.5° whereas that of the graphite/SiC composite was reduced to 43°. The study of the formation of graphite/SiC composite showed that SiO 2 could be reduced using carboxymethylated cellulose to SiO (g), which was deposited on the graphite to form SiC coating.
            Bookmark

            Author and article information

            Journal
            ijmr
            International Journal of Materials Research
            Carl Hanser Verlag
            1862-5282
            2195-8556
            12 July 2018
            : 109
            : 7
            : 629-637
            Affiliations
            a The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan, P.R. China
            b School of Chemical and Process Engineering, University of Leeds, Leeds, UK
            Author notes
            [* ] Correspondence address, Prof. Xiangcheng Li and Prof. Boquan Zhu, The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, No. 947, Heping Road, Wuhan 430081, P.R. China, Tel.: +86-27-68862616, Fax: +86-27-68862616, E-mail: lixiangcheng@ 123456wust.edu.cn , zhuboquan@ 123456wust.edu.cn
            Article
            MK111644
            10.3139/146.111644
            1a42d396-82be-436d-9a9f-f39f7433804e
            © 2018, Carl Hanser Verlag, München
            History
            : 12 October 2017
            : 25 January 2018
            : 7 May 2018
            Page count
            References: 30, Pages: 9
            Categories
            Original Contributions

            Materials technology,Materials characterization,Materials science
            Composite,Oxidation resistance,Wettability,Growth

            Comments

            Comment on this article