Sintered metal material having directional porosity and comprising at least one ferromagnetic part, and production method thereof
AssigneeOffice National d'Etudes et de Recherches Aerospatiales (O.N.E.R.A.)
InventorsOceané Lambert, Cécile Davoine
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Abstract
The invention relates to a sintered metal material comprising at least one magnetic part, characterised by directional through-pores having a size of between 1 and 100 μm, said material having a density varying by less than 20% from one sample of 1 cm3 to another taken from a one-piece part made from the material.
Claims15
A sintered metallic material having a lamellar structure and comprising at least one magnetic portion, said sintered metallic material comprising open-ended oriented porosities of dimension of between 1 and 100 μm, said sintered metallic material having a density varying by less than 20% from one 1 cm3 sample to another, taken from a single-piece part made from said sintered metallic material, wherein the sintered metallic material is denser than titanium.
A process for manufacturing a sintered metallic material, comprising:
- providing a mixture of metallic powder and of solvent, the powder comprising a magnetic portion,
- casting the mixture into a mold,
- applying a magnetic field parallel to within +/−10° to the gravitational field lines in order to cause the magnetic field lines to pass into the molded mixture, causing the displacement of the powder until the powder is flush with an upper surface of the mixture,
- cooling the molded mixture to a temperature below the solidification temperature of the solvent,
- sublimating the solidified solvent,
- sintering the powder to obtain the sintered metallic material, the pores of the sintered metallic material being aligned along the magnetic field lines, being open-ended and being of dimension of between 1 and 100 μm, the sintered metallic material having a density varying by less than 20% from one 1 cm3 sample to another, taken from a single-piece part made from said sintered metallic material.
Dependencies are inferred from the claim text.