Assessment of mechanical properties of an elastomeric material ezposed to PEM fuel cell environment by microindentation method
Proton exchange membrane (PEM) fuel cell stack requires elastomeric gaskets in each cell to keep the reactant gases within their respective regions.Chemical and mechanical stability of the elastomeric material is of great concern to the overall performance of the fuel cell stacks.In this paper,mechanical degradation of an elastomeric material,fluoroelas-tomer,which is a potential gasket material for PEM fuel cells,was investigated.One solution which is similar to that in real PEM fuel cell was used in this work.Two temperatures of 80℃ and 60℃ were selected in this study.Mechanical properties of the samples before and after exposure to the environment were studied by microindentation.Indentation load,hysteresis loss energy,elastic modulus and hardness were obtained from the loading and unloading curves.Indentation deformation was studied using Hertz contact model.It was found that the mechanical properties of the samples did not change significantly after exposure to the environment over time.The microindentation method is proved to provide a simple and efficient way to evaluate the mechanical properties of elastomeric materials.
Mechanical property Fluoroelastomer PEM fuel cell Environment Microindentation
Jinzhu Tan Y.J.Chao Yanchao Xin Guo Li Jianming Gong
School of Mechanical and Power Engineering,Nanjing University of Technology,Nanjing,Jiangsu 210009,C Department of Mechanical Engineering,University of South Carolina,Columbia,SC29208,USA
国际会议
成都
英文
91-96
2009-10-16（万方平台首次上网日期，不代表论文的发表时间）