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The influence of matrix composition and reinforcement type on the properties of polysialate composites.

机译：基质组成和增强类型对聚唾液酸酯复合材料性能的影响。

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摘要

There is a critical need for the development of materials for eliminating fire as a cause of death in aircraft accidents. Currently available composites that use organic matrices not only deteriorate at temperatures above 300°C but also emit toxic fumes. The results presented in this dissertation focus on the development of an inorganic matrix that does not burn or emit toxic fumes. The matrix, known as polysialate, can withstand temperatures in excess of 1000°C. The matrix behaves like a ceramic, but does not need high curing temperatures, so it can be processed like many common organic matrices.; The major parameters evaluated in this dissertation are: (i) Influence of reinforcement type, (ii) Matrix formulation for both wet-dry durability and high temperature resistance, (iii) Influence of processing variables such as moisture reduction and storage, (iv) Tensile strain capacity of modified matrices and matrices reinforced with ceramic microfibers and discrete carbon fibers, and (v) analytical modeling of mechanical properties.; For the reinforcement type; carbon, glass, and stainless steel wire fabrics were investigated. Carbon fabrics with 1, 3, 12, and 50k tows were used. A matrix chemical formulation that can withstand wetting and drying was developed. This formulation was tested at high temperatures to ascertain its stability above 400°C. On the topic of processing, shelf life of prepregged fabric layers and efficient moisture removal methods were studied. An analytical model based on layered reinforcement was developed for analyzing flexural specimens.; It is shown that the new inorganic matrix can withstand wetting and drying, and also high temperature. The layered reinforcement concept provides accurate prediction of strength and stiffness for composites reinforced with 1k and 3k tows. The prepregged fabric layers can be stored for 14 days at −15°C without losing strength.
机译：迫切需要开发用于消除由于飞机事故而致死的火灾的材料。使用有机基质的当前可用复合材料不仅会在高于300°C的温度下劣化，而且还会散发有毒烟雾。本文提出的结果集中在开发不会燃烧或释放有毒烟雾的无机基质上。称为聚唾液酸盐的基质可以承受超过1000°C的温度。基体的行为类似于陶瓷，但不需要很高的固化温度，因此可以像许多常见的有机基体一样进行处理。本论文评估的主要参数为：（i）增强类型的影响，（ii）湿-干耐久性和耐高温性的基体配方，（iii）减湿和储存等加工变量的影响，（iv）改性基体和陶瓷微纤维和离散碳纤维增强的基体的拉伸应变能力，以及（v）力学性能的分析模型。对于钢筋类型；研究了碳纤维，玻璃纤维和不锈钢丝织物。使用具有1、3、12和50k丝束的碳纤维织物。开发了可以承受润湿和干燥的基质化学配方。在高温下对该配方进行了测试，以确定其在400°C以上的稳定性。在加工主题上，研究了预浸织物层的保存期限和有效的除湿方法。建立了基于分层钢筋的分析模型，用于分析弯曲试样。结果表明，新的无机基体可以承受润湿和干燥，还可以承受高温。分层的增强概念可以准确预测1k和3k丝束增强的复合材料的强度和刚度。预浸的织物层可以在-15°C下保存14天而不会失去强度。

著录项

  • 作者

    Hammell, James A.;

  • 作者单位

    Rutgers The State University of New Jersey - New Brunswick.;

  • 授予单位 Rutgers The State University of New Jersey - New Brunswick.;
  • 学科 Engineering Materials Science.
  • 学位 Ph.D.
  • 年度 2000
  • 页码 158 p.
  • 总页数 158
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 工程材料学;
  • 关键词

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