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结构梯度的高频超声波光谱在注射成型PEEK中使用聚焦传感器.

Jannik Summa1, Moritz Kurkowski2, Christian Jungmann1

  • 1Fraunhofer Institute for Non-Destructive Testing IZFP, 66123 Saarbrücken, Germany.

Sensors (Basel, Switzerland)
|July 29, 2023
PubMed
概括

高频超声波谱学 (HF-US) 通过分析晶体结构来绘制聚-- (PEEK) 的机械特性. 这项技术揭示了材料形态如何影响热塑性材料的性能.

关键词:
皮克皮克 (Peek Peek) 是一种古老的风格.高频超声波测试 高频超声波测试形态梯度的形态梯度是什么房地产成像产品的成像

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科学领域:

  • 材料科学 材料科学 材料科学
  • 聚合物物理 聚合物物理
  • 非破坏性测试 不破坏性测试

背景情况:

  • 高性能热塑性材料的行为是由结晶度和相分布决定的.
  • 微观结构的不均质源于不同的无形和晶体阶段刚性和异构性.
  • 微结构成像对于表征过程诱导的形态和由此产生的材料特性至关重要.

研究的目的:

  • 应用高频超声波谱学 (HF-US) 进行注射成型聚乙烯-乙烯 (PEEK) 拉伸样品的表征.
  • 研究与工艺相关的形态和材料机械性能之间的关系.
  • 展示分析程序来绘制渐进的机械性质,并将它们与晶体含量相关联.

主要方法:

  • 使用名义中心频率为25MHz的聚焦超声波传感器,用于高侧分辨率成像.
  • 采用高频超声波光谱 (HF-US) 在表现出各种形态的PEEK拉伸样本上.
  • 应用分析程序,包括后墙回声,飞行时间和里埃转换的时间信号.

主要成果:

  • HF-US成功实现了高侧分辨率的PEEK标本的成像.
  • 波传播分析与弹性模量,密度和阻尼相关.
  • 实现了与特定的晶体含量和形态区域相关的逐步机械性质的映射.

结论:

  • HF-US是一种有效的技术,用于描述PEEK的微观结构和机械性能.
  • 这项研究表明,HF-US能够将材料形态与性能联系起来.
  • 这种方法有助于更深入地了解热塑性材料的行为受到加工的影响.