Novel Bamboo-Like Fibrous, Micro-Channeled and Functional Gradient Microstructure Control of Ceramics

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In this paper development of novel ceramic microstructures by the fibrous monolithic process were reported. Attempts were made to tailor the microstructures of these advanced ceramics by introducing fibrous or layered morphology to incorporate multi-toughening mechanisms. Fabrication and characterization of four different kinds of microstructure, termed in this manuscript as network type, double network type, functional gradient microchanneled and functional gradient microchanneled double network type microstructure, were reported. In network and double network type microstructure developments the two phase Al<SUB>2</SUB>O<SUB>3</SUB>-(m-ZrO<SUB>2</SUB>) cores were embedded within network-type frames of t-ZrO<SUB>2</SUB> single phase. In the double network type microstructure, an additional thicker network-type t-ZrO<SUB>2</SUB> enclosure surrounded a network-type micro-assembly. Unidirectionally aligned continuously porous HAp-Al<SUB>2</SUB>O<SUB>3</SUB>-ZrO<SUB>2</SUB> tri-phase ceramic composites were fabricated by the same method to incorporated functional gradient for improved functionality and depress processing defects. The microstructure had three layers of HAp/HAp-(Al<SUB>2</SUB>O<SUB>3</SUB>-(m-ZrO<SUB>2</SUB>))/Al<SUB>2</SUB>O<SUB>3</SUB>-(t-ZrO<SUB>2</SUB>) around the continuous pore with compositional gradient. In the functionally gradient micro-channeled HAp/HAp-(Al<SUB>2</SUB>O<SUB>3</SUB>-(m-ZrO<SUB>2</SUB>))/Al<SUB>2</SUB>O<SUB>3</SUB>-(t-ZrO<SUB>2</SUB>) composites, the size and distribution of micro-channels were homogeneously controlled. Detailed morphological analyses of the resulting microstructures were studied.

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  • Materials transactions  

    Materials transactions 49(2), 339-344, 2008-02-01 

    The Japan Institute of Metals and Materials

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各種コード

  • NII論文ID(NAID)
    10021144267
  • NII書誌ID(NCID)
    AA1151294X
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    13459678
  • NDL 記事登録ID
    9354589
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z53-J286
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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