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开发强大的FeSiAl/PEEK复合材料,用于广泛的温度范围的电磁波吸收

Jie Gao¹, Zhenjie Guan¹, Yuanxun Gong²

¹School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China.

ACS applied materials & interfaces

|January 9, 2025

概括

研究人员开发了强大的FeSiAl/PEEK复合材料,用于微波吸收和机械强度. SiO2外在广泛的温度下提高了性能,为苛刻的应用提供了有前途的解决方案.

科学领域:

材料科学材料科学材料科学
电磁学电磁学电磁学电磁学
聚合物复合材料聚合物复合材料

背景情况:

目前的研究重点是微波吸收涂层,往往忽略了具有集成机械性能的材料.
开发具有微波吸收和机械强度的材料对于先进的应用至关重要.
合金SiAl/PEEK复合材料具有潜力,但需要优化以适应广泛的温度性能.

研究的目的:

准备和表征具有强大的FeSiAl/PEEK复合材料,具有增强的微波吸收和机械性能.
为了研究SiO2外对电磁 (EM) 参数和机械行为在广泛的温度范围内的影响.
评估材料适用于广泛温度范围的微波吸收应用的适用性.

主要方法:

使用球磨后化,sol-gel方法和热压制制造薄片-FeSiAl@SiO2/PEEK复合材料的制造.
在不同温度下对电磁参数 (反射损失,吸收带宽) 的详细分析.
在不同的温度下 (298 K和573 K) 测试机械性能 (抗拉强度).

主要成果:

含有20%体积%填充剂的Flaky-FeSiAl@SiO2/PEEK复合材料在X波段中表现出极好的广泛温度微波吸收.
在室温下,最小反射损失 (RLmin) 达到-28.6dB,有效吸收带宽 (EAB) 为3.26GHz,厚度为1.8mm.
在573K,RLmin为-25.8dB,EAB为2.04GHz,厚度为1.3毫米,表现保持性能.
二氧化外改善了阻抗匹配,并在高温下减少了流损失.
拉力强度在298K时达到84.38MPa,在573K时保持在16.33MPa,这表明机械性能得到了提高.

结论:

SiO2外对于在广泛的温度范围内保持微波吸收和机械完整性至关重要.
薄片-FeSiAl@SiO2/PEEK复合材料在微波吸收和机械性能方面表现出有希望的平衡.
这种材料是需要在极端温度条件下可靠性能的应用的强大候选者.

关键词:

铁/PEEK 是一个二氧化外的外.电磁波的吸收电磁波的吸收温度升高导致的温度升高.机械属性机械属性机械属性

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