摘要： Effects of reducing environment and thermal aging on the joint strength of a BaO–B2O3–Al2O3–SiO2 glass–ceramic sealant (GC-9) with a ferritic-stainless-steel interconnect (Crofer 22 H) for planar solid oxide fuel cells are investigated. A technique is developed for conducting mechanical tests at room temperature and 800 °C in H2-7 vol% H2O under shear and tensile loadings. Given an aged condition and loading mode, the joint strength at 800 °C is lower than that at room temperature in the given humidified hydrogen atmosphere. A thermal aging at 800 °C in H2-7 vol% H2O for 100 h or 1000 h enhances both shear and tensile joint strengths at room temperature but degrades them at 800 °C in the same reducing environment. Non-aged specimens show a comparable joint strength and fracture mode when tested in humidified hydrogen and in air under a given loading mode and testing temperature. The shear strength at 800 °C for joint specimens after a 1000-h thermal aging at 800 °C in air or humidified hydrogen is reduced by a similar extent of 19%, compared to the counterpart of non-aged joint specimens tested in the same oxidizing or reducing environment. •A setup is built to assess sealant/interconnect joint strength in humidified H2.•Effects of reducing environment and thermal aging on joint strength are studied.•Thermal aging in wet H2 enhances joint strength at 25 °C but degrades it at 800 °C.•Unaged joints show a comparable strength when tested in air or humidified H2.•Thermal aging in air or wet H2 degrades high-temperature joint strength comparably. 出版者： Elsevier B.V 出版日期： 2015-04-15 出處： Journal of power sources, 2015-04, Vol.280, p.272-288 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2015 Elsevier B.V. 識別號： ISSN: 0378-7753 識別號： EISSN: 1873-2755 識別號： DOI: 10.1016/j.jpowsour.2015.01.126
