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基于比斯马利胺-树脂的复合材料的制备和表征

Lingrui Liang¹, Pei Wang¹, Zhihong Li¹

¹Key Laboratory for Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China.

Materials (Basel, Switzerland)

|April 27, 2024

概括

将以太结合物引入与碳化 (SiC) 的双胺 (BMI) 树脂复合材料中,可显著提高机械性能和高温稳定性. 这些经过修改的复合材料显示出更好的屈曲强度,并在热处理后保持性能.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
机械工程机械工程

背景情况:

比斯马利胺 (BMI) 树脂是先进的耐热聚合物,以其高温性能而闻名.
碳化 (SiC) 是一种高性能陶材料,具有特殊的硬度和导热性.
复合材料结合了矩阵和增强件,以实现优越的性能.

研究的目的:

研究将以太键合并到BMI树脂-SiC复合材料中的效果.
评估加工参数对机械性能和热氧化稳定性的影响.
了解微观结构与性能之间的相关性.

主要方法:

使用BMI树脂和SiC制造复合材料.
在BMI树脂矩阵中引入以太键.
处理参数的系统变化 (树脂含量,成型密度).
在室温和高温下进行机械测试 (柔性强度).
高温热氧化稳定性的评估.
使用扫描电子显微镜 (SEM) 进行微结构分析.

主要成果:

与未经修改的对应物相比,带有以太键的复合材料表现出更好的机械性能.
柔性强度随着树脂含量和成型密度的增加而增加,在27.5%体积%的树脂和2.31 g/cm3密度下达到109.52 MPa.
经过热处理后,经过修改的复合材料在300°C时保留了74.5%的强度.
SEM分析证实了微观结构和观察到的机械性能之间存在强烈的相关性.

结论:

以太键修改是一种有效的策略,可以提高BMI-SiC复合材料的机械性能.
优化的加工参数对于最大限度地提高复合材料强度至关重要.
增强的复合材料表现出良好的高温机械完整性和热氧化稳定性.

关键词:

双雄性化物双雄性化物复合材料复合材料是一种复合材料.机械性能机械性能机械性能碳化是碳化的重要组成部分.

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