Understanding the Crystalline Region Damage Mechanism of XLPE in Water Tree Propagation by Erosion Method

doi:10.1109/TDEI.2021.009678

	Understanding the Crystalline Region Damage Mechanism of XLPE in Water Tree Propagation by Erosion Method
	Li, Kangle 1; Zhou, Kai 2; Zhang, Hongliang 1; Jin, Hai 1; Li, Xiaonan 1
刊名	IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION
	2021-12-01
卷号	28 期号:6 页码:2074-2082
关键词	XLPE water tree crystalline region damage dislocations
ISSN号	1070-9878
DOI	10.1109/TDEI.2021.009678
英文摘要	This study investigates the damage characteristics and mechanism of the crystalline regions of cross-linked polyethylene (XLPE) in water tree propagation. XLPE cable samples are subjected to an accelerated water tree aging at a voltage of 7.5 kV/400 Hz for 240, 480 and 720 hours. After the water tree aging, the crystalline structural changes of the water tree samples are observed by X-ray diffraction (XRD). In addition, the water tree samples are eroded and the morphologies of the crystalline regions in water tree regions are observed by a scanning electron microscope (SEM). The XRD results show that the crystallinities of the aged samples decrease with aging, especially after 240 hours. The SEM results show that after 240 hours of aging, slip lines and dislocation steps emerge on the fracture surfaces. After 480 hours, microcracks with sizes of several micrometers are observed in the directions of the crystal faces. After 720 hours, conical dislocation pits appear in the samples and there are microvoids at the bottoms of the pits. Based on the XRD and SEM results, it is concluded that the crystalline regions of XLPE are damaged in the water tree aging. At last, the initiation process of the dislocations and the damage characteristics of the crystalline regions in the water tree propagation are discussed.
WOS研究方向	Engineering ; Physics
语种	英语
出版者	IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
WOS记录号	WOS:000742182400036
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/154961]
专题	电气工程与信息工程学院
作者单位	1.Lanzhou Univ Technol, Coll Elect Engn & Informat Engn, Lanzhou, Peoples R China; 2.Sichuan Univ, Coll Elect Engn, Chengdu, Peoples R China
推荐引用方式 GB/T 7714	Li, Kangle,Zhou, Kai,Zhang, Hongliang,et al. Understanding the Crystalline Region Damage Mechanism of XLPE in Water Tree Propagation by Erosion Method[J]. IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION,2021,28(6):2074-2082.
APA	Li, Kangle,Zhou, Kai,Zhang, Hongliang,Jin, Hai,&Li, Xiaonan.(2021).Understanding the Crystalline Region Damage Mechanism of XLPE in Water Tree Propagation by Erosion Method.IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION,28(6),2074-2082.
MLA	Li, Kangle,et al."Understanding the Crystalline Region Damage Mechanism of XLPE in Water Tree Propagation by Erosion Method".IEEE TRANSACTIONS ON DIELECTRICS AND ELECTRICAL INSULATION 28.6(2021):2074-2082.