Methods of fabricating cermet materials and methods of utilizing same
AssigneeBattelle Energy Alliance, LLC
InventorPeter C. Kong
Life of this patent
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Abstract
Methods of fabricating cermet materials and methods of utilizing the same such as in filtering particulate and gaseous pollutants from internal combustion engines having intermetallic and ceramic phases. The cermet material may be made from a transition metal aluminide phase and an aluminia phase. The mixture may be pressed to form a green compact body and then heated in a nitrogen-containing atmosphere so as to melt aluminum particles and form the cermet. Filler materials may be added to increase the porosity or tailor the catalytic properties of the cermet material. Additionally, the cermet material may be reinforced with fibers or screens. The cermet material may also be formed so as to pass an electrical current therethrough to heat the material during use.
Claims58
A method of filtering exhaust gases comprising:
- providing a porous filter made from a cermet material comprising:
- a substantial number of pores;
- a transition metal aluminide phase;
- and
- a discontinuous ceramic phase bonded by the transition metal aluminide phase, wherein the ceramic phase is selected from the group consisting of alumina, zirconia silicate, zirconia, mullite, cordierite, and iron III oxide, and wherein the ceramic phase comprises at least approximately 50% by weight of the cermet material;
- and
- operably coupling the porous filter to exhaust gases from an internal combustion engine to cause the exhaust gases to travel through the pores of the porous filter in contact with the cermet material thereof.
A method of filtering exhaust gases comprising:
- providing a porous filter made from a cermet material comprising:
- a substantial number of pores,
- a transition metal aluminide phase,
- a ceramic phase selected from the group consisting of alumina, zirconia silicate, zirconia, mullite, cordierite, and iron III oxide, and
- an ammonia emitting phase;
- and
- operably coupling the porous filter to exhaust gases from an internal combustion engine to cause the exhaust gases to travel through the pores of the porous filter in contact with the cermet material thereof.
A method of filtering exhaust gases comprising:
- providing a porous filter made from a cermet material comprising:
- a substantial number of pores,
- a transition metal aluminide phase,
- a ceramic phase selected from the group consisting of alumina, zirconia silicate, zirconia, mullite, cordierite, and iron III oxide, and
- a hydrocarbon emitting phase;
- and
- operably coupling the porous filter to exhaust gases from an internal combustion engine to cause the exhaust gases to travel through the pores of the porous filter in contact with the cermet material thereof.
A method of filtering exhaust gases comprising:
- providing a porous filter made from a cermet material comprising:
- a substantial number of pores,
- a transition metal aluminide phase,
- a ceramic phase selected from the group consisting of alumina, zirconia silicate, zirconia, mullite, cordierite, and iron III oxide, and
- an alkali oxide phase;
- and
- operably coupling the porous filter to exhaust gases from an internal combustion engine to cause the exhaust gases to travel through the pores of the porous filter in contact with the cermet material thereof.
Dependencies are inferred from the claim text.