Patent ID: 8163435

Claim:
A porous body, comprising: a predominantly open-pored structure having a density of from 40 to 70% of a theoretical density and formed of sintered grains of an Fe-based alloy containing >50% by weight of Fe, the alloy including: 15 to 35% by weight of Cr; 0.01 to 2% by weight of at least one element selected from the group consisting of Ti, Zr, Hf, Mn, Y, Sc, and rare earth metals; 0 to 10% by weight of at least one element selected from the group consisting of Mo and Al; 0 to 5% by weight of at least one element selected from the group consisting of Ni, W, Nb, and Ta; 0.1 to 1% by weight of O; balance Fe and impurities; and wherein at least one metal selected from the group consisting of Y, Sc, and rare earth metals, and at least one metal selected from the group consisting of Cr, Ti, Al, and Mn form a mixed oxide; and wherein a proportion of from 1 to 95% of a surface of the sintered grains is covered by the mixed oxide.