Interconnects for solid oxide fuel cell comprising nano-sized oxide dispersion in ferritic stainless steel and manufacturing method thereof

An interconnect for a solid oxide fuel cell comprising ferritic stainless steel dispersed with nano-CeO2 and Nb2O5,

• wherein a particle size of the nano-CeO2 is 20 nm or less,
• wherein a particle size of the Nb2O5 is 45 μm or less,
• wherein a composition of the ferritic stainless steel is as follows:
• Steel
• Element Composition (wt. %)
• alloy
• Fe
• Cr
• O
• S
• N
• C
• Si
• Mn
• Balance
• 16.85
• 0.054
• 0.003
• 0.13
• 0.02
• 0.5
• 0.62
• and wherein a content of the nano-CeO2 is 3 wt. % and a content of the Nb2O5 is 1 wt. %;
• wherein said ferritic stainless steel is made by the following process:
• obtaining alloy powder slurry by mixing nano-CeO2 powder and Nb2O5 powder with ferritic stainless steel powder and then using a high energy ball milling (HEBM) process of the mixed powder;
• drying the slurry;
• grinding and sieving the dried mixed powder;
• pelletizing the ground and sieved powder by a uni-axial press;
• obtaining a molded body by cold-isostatic pressing the pellets;
• and
• obtaining an alloy-sintered body by sintering the molded body;
• wherein the alloy-sintered body is said ferritic stainless steel;
• and
• wherein in the alloy-sintered body, nano-CeO2 and Nb2O5 have a uniform distribution and form a microstructure.