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Effects of Matrix Cracking on the Creep of SiC-SiC Microcomposites

机译：基体开裂对SiC-SiC微复合材料蠕变的影响

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摘要

The creep behavior of SiC/C/SiC microcomposites at 1200-1400℃ and 140-450 Mpa was investigated in the presence and absence of matrix cracking. The microcomposites consisted of single Hi Nicalon fibers coated with a CVD carbon interlayer and a CVD SiC matrix. Since the fibers and matrix had been examined by the same experimental technique, direct comparisons of the creep of the composite and of the constituents were performed. The creep of uncracked microcomposites was successfully modeled using a simple rule of mixtures algorithm. When matrix cracks were present, the microcomposites were modeled using a series composite consisting of intact microcomposite, exposed fiber at the matrix crack, and the debonded region between these first two regions.
机译：研究了存在/不存在基体裂纹的情况下，SiC / C / SiC微复合材料在1200-1400℃和140-450 Mpa下的蠕变行为。所述微复合物由涂覆有CVD碳中间层和CVD SiC基质的单Hi Nicalon纤维组成。由于已经通过相同的实验技术检查了纤维和基体，因此对复合材料及其成分的蠕变进行了直接比较。使用简单的混合算法规则，成功地模拟了未破裂的微复合材料的蠕变。当存在基体裂纹时，使用一系列完整的复合材料对微复合材料进行建模，该复合材料由完整的微复合材料，基体裂纹处的裸露纤维以及前两个区域之间的剥离区域组成。

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  • 来源
  • 会议地点 Osaka(JP);Osaka(JP);Osaka(JP);Osaka(JP)
  • 作者

    R.E. Tressler; K.L. Rugg; C.E. Bakis; J. Lamon;

  • 作者单位

    Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA;

    Department of Materials Science and Engineering, The Pennsylvania State University, University Park, PA 16802, USA Currently at the Rockwell Science Center, Thousand Oaks, CA, USA;

    Department of Engineering Science and Mechanics, The Pennsylvania State University, University Park, PA 16802, USA;

    Laboratoire des Composites Thermostructuraux, Domaine Universitaire, 3, allee de La Boetie, F-33600 Pessac, France;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 TQ174.58;
  • 关键词

    ceramic composites; SiC fibers; SiC matrix; creep;

    机译：陶瓷复合材料； SiC纤维SiC基体爬行;

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