SOFC硬焊封裝接合件高溫耐久機械性質;High-Temperature Durable Mechanical Properties of Braze Sealing Joint for SOFC

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Please use this identifier to cite or link to this item: http://ir.lib.ncu.edu.tw/handle/987654321/84762

Title:	SOFC硬焊封裝接合件高溫耐久機械性質;High-Temperature Durable Mechanical Properties of Braze Sealing Joint for SOFC
Authors:	林志光
Contributors:	機械工程學系
Keywords:	固態氧化物燃料電池;硬焊封裝;接合件;高溫;機械性質;Solid Oxide Fuel Cell;Braze Sealing;Joint;High Temperature;Mechanical Properties
Date:	2020-12-08
Issue Date:	2020-12-09 10:53:59 (UTC+8)
Publisher:	行政院原子能委員會
Abstract:	金屬支撐固態氧化物燃料電池（MS-SOFC）具有高抗氧化還原及抗熱震之特性，極具潛力應用於快速啟動之發電系統或移動載具之輔助電力裝置。MS-SOFC系統在運轉使用時，隨著工作溫度改變，由於不同組件間具有不同的熱膨脹係數值，加上工作環境溫度分佈不均勻，因而會產生不可忽視的熱應力，在運轉高溫階段，熱應力的長久作用，亦會造成電池堆接合件受到潛變機制作用的影響，產生過大變形甚至斷裂的可能，因此對MS-SOFC接合件進行高溫潛變性能分析，將是開發平板式MS-SOFC電池堆不可或缺的步驟。硬焊封裝為目前發展新一代MS-SOFC系統所考慮的封裝技術，依此，配合核研所開發適用MS-SOFC之高溫硬焊合金材料，本計畫將對該硬焊合金材料與金屬連接板之接合件進行在高溫環境下受應力作用之潛變試驗，分析相關破損機制，進而建立MS-SOFC電池堆接合件耐久結構強度評估模式，作為核研所設計與開發MS-SOFC電池堆組件結合之參考，並協助核研所發展改善電池堆接合件耐久強度之技術。 ;Metal-supported solid oxide fuel cells (MS-SOFCs) have recently received much more attention, in particular for applications in mobile vehicles and auxiliary power systems, as they have a lower working temperature and a shorter start-up time in comparison with other types of SOFC. Braze seals have been applied to MS-SOFCs for sealing the anode-electrolyte-cathode assembly and metallic interconnects thanks to a lower operation temperature in MS-SOFCs. The high-temperature operating conditions could generate significant thermal stresses in an SOFC stack due to thermal mismatch between components. Such thermal stresses can cause significant creep deformation and damage in components at steady operation stage and degrade the structural integrity and electrochemical performance of SOFC stacks. The aim of this study is thus to investigate the high-temperature creep behavior of the braze seal/metallic interconnect joint in MS-SOFC. Based on the creep testing results, it is intended to develop an effective mechanical life assessment model for braze seal/metallic interconnect joints which can be applied to the MS-SOFC system being developed at the Institute of Nuclear Energy Research.
Relation:	財團法人國家實驗研究院科技政策研究與資訊中心
Appears in Collections:	[Departmant of Mechanical Engineering ] Research Project

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