通过X射线微型CT成像对现场服务的制绝缘体进行微结构演化研究
Tiantian Chen1, Fanglin Zha2, Qian Luo1
1Key Laboratory of Advanced Civil Engineering Materials (the Ministry of Education), School of Materials Science and Engineering, Tongji University, Shanghai 201804, China.
Polymers
|November 27, 2025
概括
复合绝缘体随着时间的推移而降解. 射线微型CT显示,老化会增加毛孔大小和毛孔度,形成新的裂,但老化深度是有限的,有助于提高可靠性.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 聚合物科学 聚合物科学
背景情况:
- 复合 caoutchouc绝缘体对于空中电力线路来说至关重要.
- 老化显著降低了绝缘体性能和寿命.
- 在绝缘体老化过程中对3D微结构变化的理解有限.
研究的目的:
- 为了研究老化复合绝缘体的3D微结构演变.
- 为了比较新鲜和现场维修绝缘体的微观结构.
- 为提高绝缘体长期可靠性提供见解.
主要方法:
- 用X射线微型计算机断层扫描 (X射线微型CT) 来进行3D微观结构的表征.
- 一个新鲜的绝缘体和一个有10年的户外服务之间的比较.
- 孔隙特征,孔隙性和裂形成的定量分析.
主要成果:
- 老龄化导致毛孔数量减少,但毛孔大小和整体毛孔度增加.
- 在现场维修的绝缘体中观察到新的裂 (100-900μm).
- 发现老化深度小于300微米,毛孔形状基本不变.
结论:
- 老化显著改变了绝缘体的3D微观结构.
- X射线微型CT有效地可视化了老化引起的微观结构变化.
- 了解这些变化是提高绝缘体耐用性和使用寿命的关键.
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