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US 8,025,838 B2Granted
Process for producing sintered porous materials
AssigneeK.U. Leuven Research & Development
InventorsBram Neirinck, Jozef Vleugels, Jan Fransaer, Omer Van Der Biest
Life of this patent
Estimating the term…
Abstract
The invention provides a process of making porous structures or materials, including the colloidal processing (e.g. slip casting, pressure casting, tape casting or electrophoretic deposition) of solid particle emulsions to form a green body that can be directly sintered without a de-binding step.
Claims33
A process for producing a macroporous ceramic or metallic, free-standing object or coating, comprising the steps of:
- making a solid particle stabilised emulsion from a combination of at least two immiscible fluids, and solid ceramic or metallic particles, wherein said solid ceramic or metallic particles are selected from the group consisting of:
- titanium, copper, zinc, cobalt, magnesium, steel, stainless steel, titanium alloys, bronze, brass, Ti—V—Al alloys, Ti—V—Zr alloys, Ti—V—Zr—Nb alloys, Al—Cu alloys, Cr—V alloys, Al2O3, ZrO2, TiO2, HfO, MgO, ZnO, BaTiO2, SrTiO3, CaTiO2, CaO, Y2O, CeO2, Fe2O3, FeO, NiO, TiB2, ZrB2, B4C, AlB2, HfB2, VB2, TaB2, CrB2, Mo2B5, W2B5, ZrN, TiN, Si3N4, HfN, NbN, VN, TaN, AlN, BN, SiAlON, SiC, TiC, ZrC, HfC, VC, NbC, CaC, Cr3C2, Mo2C, WC, V2C, Nb2C, Ta2C, fluorides, borosilicate glass, potassium borosilicate, Li2Si2O5, oxyfluoride glass ceramics, calcium phosphate, hydroxyapatite, LaPO4, CePO4 and combinations thereof, and wherein said solid ceramic or metallic particles form a layer onto or are densely packed at the interface of said at least two immiscible fluids,
- colloidal processing of solid particle stabilised emulsion to form a ceramic or metallic green body or coating, and
- directly sintering said ceramic or metallic green body or coating without a de-binding step.
1 more element
A process for producing a macroporous ceramic or metallic, free-standing object or coating, comprising the steps of:
- making a solid particle stabilized emulsion from a combination of at least two immiscible fluids, and solid ceramic or metallic particles, wherein said solid ceramic or metallic particles are selected from the group consisting of:
- titanium, copper, zinc, cobalt, magnesium, steel, stainless steel, titanium alloys, bronze, brass, Ti—V—Al alloys, Ti—V—Zr alloys, Ti—V—Zr—Nb alloys, Al—Cu alloys, Cr—V alloys, Al2O3, ZrO2, TiO2, HfO, MgO, ZnO, BaTiO2, SrTiO3, CaTiO2, CaO, Y2O, CeO2, Fe2O3, FeO, NiO, TiB2, ZrB2, B4C AlB2, HfB2, VB2, TaB2, CrB2, Mo2B5, W2B5, ZrN, TiN, Si3N4, HfN, NbN, VN, TaN, AlN, BN, SiAlON, SiC, TiC, ZrC, HfC, VC, NbC, CaC, Cr3C2, Mo2C, WC, V2C, Nb2C Ta2C, fluorides, borosilicate glass, potassium borosilicate, Li2Si2O5, oxyfluoride glass ceramics, calcium phosphate, hydroxyapatite, LaPO4, CePO4 and combinations thereof, and wherein said solid ceramic or metallic particles form a layer onto or are densely packed at the interface of said at least two immiscible fluids,
- colloidal processing of the solid particle stabilized emulsion to form a ceramic or metallic green body or coating, wherein said colloidal processing involves a method selected from the group consisting of slip casting, pressure casting, tape casting, electrophoretic deposition and dip coating, and
- directly sintering said ceramic or metallic green body or coating without a de-binding step.
1 more element
A process for producing a macroporous ceramic or metallic, free-standing object or coating, comprising the steps of:
- making a solid particle stabilized emulsion from a combination of at least two immiscible fluids, and solid ceramic or metallic particles, wherein said solid ceramic or metallic particles are selected from the group consisting of:
- titanium, copper, zinc, cobalt, magnesium, steel, stainless steel, titanium alloys, bronze, brass, Ti—V—Al alloys, Ti—V—Zr alloys, Ti—V—Zr—Nb alloys, Al—Cu alloys, Cr—V alloys, Al2O3, ZrO2, TiO2, HfO, MgO, ZnO, BaTiO2, SrTiO3, CaTiO2, CaO, Y2O, CeO2, Fe2O3, FeO, NiO, TiB2, ZrB2, B4C, AlB2, HfB2, VB2, TaB2, CrB2, Mo2B5, W2B5, ZrN, TiN, Si3N4, HfN, NbN, VN, TaN, AlN, BN, SiAlON, SiC, TiC, ZrC, HfC, VC, NbC, CaC, Cr3C2, Mo2C, WC, V2C, Nb2C Ta2C, fluorides, borosilicate glass, potassium borosilicate, Li2Si2O5, oxyfluoride glass ceramics, calcium phosphate, hydroxyapatite, LaPO4, CePO4 and combinations thereof, and wherein said solid ceramic or metallic particles form a layer onto or are densely packed at the interface of said at least two immiscible fluids,
- colloidal processing of solid particle stabilized emulsion to form a ceramic or metallic green body or coating, and
- directly sintering said ceramic or metallic green body or coating without a de-binding step,
- wherein said solid particle stabilised emulsion is surfactant-free and comprises a ceramic powder selected from the group consisting of silicon carbide, silicon nitride, titanium diboride, and aluminium nitride.
2 more elements
Dependencies are inferred from the claim text.