Finite element modeling of creep behavior of porous nickel alloys at the operating conditions of molten carbonate fuel cell

摘要

In this paper, creep behavior of porous Ni-Al alloys for molten carbonate fuel cell (MCFC) anode materials at 650 C was simulated by using finite element method. Influences of porosity, pore size, and loading on the material deformation behavior and stress distribution were investigated, respectively. The results show that the material service life is decreased with the porosity and pore diameter increasing if other conditions are constant and stresses mainly distribute in the weak edges of porous materials. The porous materials are inclined to deform, especially for the border regions of porous materials, when the loading becomes larger. The finite element simulation of the creep behavior of porous Ni-Al alloys can be used for predicting the material characteristics and lifetime.