• 文献标题:   Inhibited grain growth in hydroxyapatite-graphene nanocomposites during high temperature treatment and their enhanced mechanical properties
  • 文献类型:   Article
  • 作  者:   LIU Y, HUANG J, NIINOMI M, LI H
  • 作者关键词:   ceramic matrix composite, annealing, interface, grain growth, hydroxyapatite, graphene nanosheet
  • 出版物名称:   CERAMICS INTERNATIONAL
  • ISSN:   0272-8842 EI 1873-3956
  • 通讯作者地址:   Chinese Acad Sci
  • 被引频次:   10
  • DOI:   10.1016/j.ceramint.2016.04.038
  • 出版年:   2016

▎ 摘  要

Nanostructured hydroxyapatite (HA)-graphene nanosheet (GN) composites have been fabricated by spark plasma sintering consolidation. Nanostructual evolution of the bioceramic-based composites during further high temperature heat treatment is characterized and enhanced mechanical strength is assessed. GN keeps intact after the treatment and its presence at HA grain boundaries effectively inhibits HA grain growth by impeding interconnection of individual HA grains. Microstructural characterization discloses strong coherent interfaces between GN and the (300) plane of HA crystals. This particular matching state in the composites agrees well with the competitive theoretical pull-out energy for single graphene sheet being departed from HA matrix. The toughening regimes that operate in HA GN composites at high temperatures give clear insight into potential applications of GN for ceramic matrix composites. (C) 2016 Elsevier Ltd and Techna Group S.r.l. All rights reserved.