碳纤维/柔性石墨复合材料接地材料的制备和性能
Mian Fan1, Huiwen He1, Lei Wang1
1State Key Laboratory of Power Grid Environmental Protection, China Electric Power Research Institute, Hongshan District, Wuhan 430070, China.
Materials (Basel, Switzerland)
|October 16, 2024
概括
这项研究开发了由石墨和碳纤维制成的柔性导电复合材料. 这些材料表现出增强的机械和电气性能,但土壤中的硫酸盐在与钢相结合时加速了它们的腐蚀.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 腐蚀工程 腐蚀工程
背景情况:
- 灵活的导电复合材料对于接地和电气应用至关重要.
- 了解材料特性和环境相互作用对于它们的性能和寿命至关重要.
研究的目的:
- 使用柔性石墨和碳纤维制备柔性导电复合材料.
- 研究碳纤维含量对机械和电气性能的影响.
- 为了评估这些复合材料在硫酸盐含有土壤中与钢相结合的腐蚀行为.
主要方法:
- 用于复合材料制备的模具压技术.
- 扫描电子显微镜 (SEM) 用于微观形态学分析.
- 机械测试 (拉力强度) 和电导度测量.
- 在不同硫酸盐度的土壤中进行电腐蚀试验.
主要成果:
- 在1:20的碳纤维与柔性石墨比率下实现最佳拉伸强度 (5.82 MPa).
- 最佳体积电阻 (4.76 × 10−5 Ω·m) 在1:30的比率下实现.
- 硫酸盐的存在加快了复合材料和钢之间的蚀腐蚀,加速度随硫酸盐度增加而增加.
- 腐蚀潜力和电流在暴露30天左右达到顶峰.
结论:
- 灵活的导电复合材料可以根据特定的机械和电气性能量身定制.
- 硫酸盐离子显著加快电腐蚀,在与这些接地材料相结合时,对钢构成风险.
- 腐蚀动力学是时间依赖的,在大约30天内观察到的最高腐蚀率.
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