无机材料学报2011，Vol.26Issue(4)：393-398,6.DOI:10.3724/SP.J.1077.2011.00393
残余应力对固体氧化物燃料电池弹塑性性能的影响
Effect of Residual Stresses on Elastoplastic Properties of SOFC by Nanoindentation Approach
摘要
Abstract
Due to the differences of Young's modulus and the mismatch of thermal expansion coefficients in the half-cell structure (NiO-YSZ/YSZ), the residual stress, which has effects on the fuel cell's performance, is aroused during sintering. Taking the residual stress into consideration, a modified reverse analysis model was proposed to calculate the mechanical property of electrolyte thin film in SOFC. Nanoindentation tests were carried out at the points with difference distances from the interface of bilayer, the load-displacement curve was presented. The results of material's mechanical property from experimental showed that the farther the indentation points was from the interface, the greater was the hardness of film. When the temperature related residual stress field was taken as the initial stress field to simulate the load-displacement curve under nanoindentation, it was found that the load-displacement curve was in agreement with the experiment curve if the residual stress was considered, and also the indentation morphology was much deeper and bigger under the residual stress condition.关键词
固体燃料电池/残余应力/纳米压痕/屈服强度Key words
SOFC/ residual stress/ nanoindentation/ yield strength分类
通用工业技术引用本文复制引用
赵翔,王峰会,王霞,刘志强..残余应力对固体氧化物燃料电池弹塑性性能的影响[J].无机材料学报,2011,26(4):393-398,6.基金项目
国家自然科学基金(10772146) （10772146）
