Creep of Zirconia/Nickel Composites

摘要

The creep properties of wet-processed 3 mol% Y_2O_3-stabilized ZrO_2/Ni composites (20 and 40 vol% of nickel content) have been studied by compressive constant load tests in the temperature range 900℃ - 1250℃ under argon atmosphere. The microstructural characterization of these cermets has been performed using scanning and transmission electron microscopy. The composites consist of nickel particles (1 μm in size) uniformly distributed throughout a fine-grained zirconia matrix (0.13 μm in size). The mechanical and microstructural results indicate that the overall creep behavior of the cermets is controlled primarily by the zirconia matrix; metal additions increase the ductility of the material.