High strength spongy sintered metal composite sheet and production method thereof
AssigneeMitsubishi Materials Corporation
InventorsMASAHIRO WADA, YOSHITAKA MAYUZUMI, KOJI HOSHINO, SABUROU WAKITA
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Abstract
A high strength spongy sintered metal composite sheet comprising a porous spongy sintered metal layer having continuous holes, and a high strength sintered, dense metal reinforcing layer having a porosity smaller than the porosity of the spongy sintered metal layer, laminated thereon, wherein the sintered, dense metal reinforcing layer has a thickness of 0.5-30% thickness with respect to the entire high strength spongy sintered metal composite sheet.
Claims23
A high strength spongy sintered metal composite sheet, comprising:
- a porous, spongy sintered metal layer having continuous holes which are open to the surface of the layer and which are continuous with internal holes of the metal layer, and a high strength, sintered dense metal reinforcing layer having a porosity less than the porosity of the spongy, sintered metal layer, laminated thereon.
A high strength spongy sintered metal composite sheet, comprising:
- a porous, spongy sintered metal layer having continuous holes, and a high strength sintered, dense metal reinforcing layer having a porosity less than the porosity of the spongy sintered metal layer, laminated thereon, wherein the sintered, dense metal reinforcing layer has a thickness of 0.5-30% with respect to the entire spongy sintered metal composite sheet.
A high strength spongy sintered metal composite sheet, comprising:
- a porous spongy, sintered metal layer having continuous holes, and a sintered, dense metal reinforcing layer having a porosity of 0-55% by volume, which is less than the porosity of the spongy sintered metal layer, laminated thereon.
A porous spongy, sintered metal layer having continuous holes and a high strength sintered, dense metal reinforcing layer having a porosity of 0-55% by volume, which is less than the porosity of the spongy sintered metal layer, laminated thereon, wherein the sintered, dense metal reinforcing layer has a thickness of 0.5-30% with respect to the entire high strength spongy sintered metal composite sheet.
A high strength spongy sintered metal composite sheet, comprising:
- a porous spongy, sintered metal layer having continuous holes and a high strength sintered, dense metal reinforcing layer having continuous holes smaller than the continuous holes opened on the surface and the continuous internal holes, with a porosity of 4-55% by volume, which is smaller than the porosity of the spongy sintered metal layer, laminated thereon.
A high strength spongy sintered metal composite sheet, comprising:
- a porous spongy, sintered metal layer having continuous holes and a high strength, sintered, dense metal reinforcing layer having continuous fine holes with a porosity of 4-55% by volume which is less than the porosity of the spongy sintered metal layer, laminated thereon, wherein the sintered, dense metal reinforcing layer has a thickness of 0.5-30% with respect to the entire high strength spongy sintered metal composite sheet.
A method of producing a high strength spongy sintered metal composite sheet, comprising:
- forming a green layer which is to be sintered to a sintered, dense metal reinforcing layer by extending a slurry comprising a mixture of material powders and a thinner or a mixture comprising material powders, a thinner and a surfactant on a carrier sheet by the doctor blade method, and then heating and drying the green layer;
- forming a green layer which is to be a spongy sintered metal layer on the dense reinforced green layer by extending a slurry prepared by mixing material powders, a thinner, a surfactant and a foaming agent on the dense reinforcing green layer by the doctor blade method, and then heating and drying the layer in order to produce a composite green sheet comprising the dense reinforcing green layer and the spongy green layer;
- and
- degreasing and sintering the composite green sheet.
A method of producing a high strength spongy sintered metal composite sheet, comprising:
- forming a dense reinforcing layer by extending a slurry comprising a mixture of material powders and a thinner or a mixture comprising material powders, a thinner and a surfactant on a carrier sheet by the doctor blade method, and then heating and drying the layer;
- forming a spongy green layer by extending a foaming slurry by the doctor blade method, and then heating and drying the layer in order to produce a spongy green layer;
- producing a composite green sheet by superimposing the spongy green layer onto one side or both sides of the dense reinforcing green layer;
- and
- degreasing and sintering the composite green sheet.
Dependencies are inferred from the claim text.