Browsing Institutt for materialteknologi by Author "Hårberg, Sofie Brandtzæg"
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Inception of vented water trees in high voltage XLPE cable insulation: Effect of inorganic contaminations inside the semiconductive material
Hårberg, Sofie Brandtzæg; Wenner, Sigurd; Hvidsten, Sverre; Einarsrud, Mari-Ann (Peer reviewed; Journal article, 2024)Wet-design AC subsea power cables are currently rated up to a maximum voltage of 72.5 kV. These high voltage (HV) cables are cost-effective alternatives to subsea cables kept dry by a protective lead sheath and exhibit ... -
Spark Plasma Sintering of Silicon Carbide and the Effect of α-SiC and β-SiC on Sintering Properties
Hårberg, Sofie Brandtzæg (Master thesis, 2022)Silisiumkarbid (SiC) er kjent for sine utmerkede termiske og mekaniske egenskaper, noe som gjør det nyttig innen mange bruksområder. Egenskaper som høy hardhet og styrke ved høy temperatur skyldes de sterke kovalente ... -
STEM-EDS of Inception Sites of Vented Trees in a HV XLPE Subsea Cable
Hårberg, Sofie Brandtzæg; Nylund, Inger-Emma; Einarsrud, Mari-Ann; Vullum, Per Erik; Lesaint, Cedric Michel; Hvidsten, Sverre (Chapter, 2023)High voltage XLPE cable cores have been subjected to wet ageing following the recommendations in CIGRE TB 722. The electrical ageing was performed at 500 Hz and 10 kV/mm. Vented water trees were detected initiating and ...