3D printing method
The present application provides a 3D printing method. The present application can provide as a method for efficiently performing 3D printing, for example, a 3D printing method capable of more rapidly and efficiently producing a three-dimensional shape precisely realized up to a fine portion.
1. A 3D printing method comprising:
forming a three-dimensional shape comprising a slurry, and
applying an electromagnetic field to the three-dimensional shape comprising the slurry,
wherein the slurry comprises a metal powder and a binder,
wherein the metal powder comprises a conductive metal having a relative magnetic permeability of 90 or more,
wherein the metal powder comprises the conductive metal in an amount of 30 weight % or more based on a total weight of the metal powder, and
wherein the electromagnetic field is formed by applying a current in a range of 100 A to 1,000 A,
wherein the slurry comprises the binder in an amount of 5 to 200 parts by weight relative to 100 parts by weight of the metal powder comprising the conductive metal.
2. The 3D printing method according to claim 1 , wherein the conductive metal has a conductivity of 8 MS/m or more at 20° C.
3. The 3D printing method according to claim 1 , wherein the conductive metal is nickel, iron or cobalt.
4. The 3D printing method according to claim 1 , wherein the metal powder comprises the conductive metal in an amount of 35 weight % or more based on the total weight of the metal powder.
5. The 3D printing method according to claim 1 , wherein the metal powder has a particle diameter of 50% particle size distribution in a range of 100 nm to 100 μm.
6. The 3D printing method according to claim 1 , wherein the metal powder is a spherical, flake, ellipsoid, needle or dendritic shape.
7. The 3D printing method according to claim 1 , wherein the binder is alkyl cellulose, polyalkylene oxide, polyalkylene carbonate, polyvinyl alcohol or lignin.
8. The 3D printing method according to claim 1 , wherein the slurry comprises 5 to 190 parts by weight of the binder relative to 100 parts by weight of the metal powder.
9. The 3D printing method according to claim 1 , wherein the electromagnetic field is formed by applying a current at a frequency in a range of 100 kHz to 1,000 kHz.
10. The 3D printing method according to claim 1 , wherein the magnetic permeability of the conductive metal is from 90 to about 300,000, and wherein the amount of the conductive metal is from 30 weight % to less than about 100 weight % relative to 100 parts by weight of the metal powder comprising the conductive metal.
11. The 3D printing method according to claim 1 , wherein the magnetic permeability of the conductive metal is from 95 to about 300,000, wherein the amount of the conductive metal is from 35 weight % to 95 weight % relative to 100 parts by weight of the metal powder comprising the conductive metal.
12. The 3D printing method according to claim 1 , wherein the electromagnetic field is applied to the three-dimensional shape such that the metal powder is melted or sintered under the electromagnetic field.
13. A 3D printing method comprising:
forming a three-dimensional shape comprising a slurry while applying an electromagnetic field,
wherein the slurry comprises a metal powder and a binder,
wherein the metal powder comprises a conductive metal having a relative magnetic permeability of 90 or more,
wherein the metal powder comprises the conductive metal in an amount of 30 weight % or more based on a total weight of the metal powder, and
wherein the slurry comprises the binder in an amount of 5 to 200 parts by weight relative to 100 parts by weight of the metal powder comprising the conductive metal.
14. A 3D printing method comprising:
forming a three-dimensional shape comprising a slurry subsequent to applying an electromagnetic field to the slurry,
wherein the slurry comprises a metal powder and a binder,
wherein the metal powder comprises a conductive metal having a relative magnetic permeability of 90 or more,
wherein the metal powder comprises the conductive metal in an amount of 30 weight % or more based on a total weight of the metal powder, and
wherein the slurry comprises the binder in an amount of 5 to 200 parts by weight relative to 100 parts by weight of the metal powder comprising the conductive metal.