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Synthesis and properties of lightweight fibrous ceramics with a 3D skeleton structure prepared by infiltration

机译：渗透法制备3D骨架结构轻质纤维陶瓷的合成及性能

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摘要

In our report, a fibrous ceramics with the mullite fibers as the matrix and SiO_2-AlPO_4 sol as the high-temperature binder were fabricated by the infiltration method. The effects of sintering temperature on the properties, such as porosity, phase transition, microstructure, compressive strength and fracture mechanism, were investigated. Compared with the fibrous ceramics with the SiO_2-B_2O_3 binder, the fibrous ceramics with the SiO_2-AlPO_4 binder exhibited lower densities (0.560-0.595 g/cm~3), lower thermal conductivities (0.157-0.165 W/mK), high strain (7-8%), high rebound-resilience (77-90%) and the same level of compressive strengths (1.1-2.1 MPa). During the cooling stage of the heat treatment process, α→β-cristobalite displacive phase transition in the SiO_2-AlPO_4 binder was successfully suppressed. The fracture behavior of the ceramics tends to be a layer-by-layer failure, which is quite different from that of the traditional ceramics. The non-brittle fracture mode and the excellent elasticity made this fibrous ceramics promising high-temperature elastic insulation materials.
机译：在我们的报告中，通过渗透法制备了以莫来石纤维为基质，SiO_2-AlPO_4溶胶为高温粘结剂的纤维陶瓷。研究了烧结温度对孔隙率，相变，显微组织，抗压强度和断裂机理等性能的影响。与具有SiO_2-B_2O_3粘合剂的纤维陶瓷相比，具有SiO_2-AlPO_4粘合剂的纤维陶瓷具有较低的密度（0.560-0.595 g / cm〜3），较低的热导率（0.157-0.165 W / mK），高应变（ 7-8％），高回弹性（77-90％）和相同水平的抗压强度（1.1-2.1 MPa）。在热处理过程的冷却阶段，成功抑制了SiO_2-AlPO_4粘合剂中α→β-方石英置换相的转变。陶瓷的断裂行为趋于逐层破坏，这与传统陶瓷有很大的不同。非脆性断裂模式和出色的弹性使这种纤维陶瓷成为有希望的高温弹性绝缘材料。

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  • 来源
    《Materials Science and Engineering》 |2015年第21期|43-49|共7页
  • 作者

    Xue Dong; Hanyu Lv; Guofa Sui; Jiachen Liu; Anran Guo; Xin Tao; Xiqing Xu; Haiyan Du;

  • 作者单位

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;

    State Key Laboratory of Precision Measuring Technology and Instruments, Tianjin University, Tianjin 300072, China;

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;

    School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Fibrous ceramics; infiltration; Microstructure; Mechanical behavior; Fracture; Insulation;

    机译：纤维陶瓷;浸润;微观结构机械性能;断裂;绝缘;

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