1. A method of cold-forming a nozzle for a laser comprising:
placing a slug of oxygen-free copper into a die;
forcing a shaped mandrel into said slug causing said slug to be extruded around said mandrel;
applying compressive force from said die onto said slug to define an outer dimension of the nozzle; and
applying radial compressive force onto an inner surface of said slug to define an inner dimension of the nozzle.
2. The method of claim 1 wherein forcing said shaped mandrel includes forcing a distal end of said shaped mandrel through said slug and defining an outlet aperture of the nozzle.
3. The method of claim 2 wherein forcing said shaped mandrel includes forcing a proximal end of said shaped mandrel into said slug and defining an inlet aperture of the nozzle.
4. The method of claim 3 wherein applying said radial compressive force includes forcing said shaped mandrel through said slug whereby said shaped mandrel defines an engagement surface that tapers toward said distal end of said shaped mandrel.
5. The method of claim 4 wherein said engagement surface urges said slug into an inner geometry of said die.
6. The method of claim 2 wherein forcing said shaped mandrel includes locating said distal end of said mandrel at a position beyond a portion of said slug identified to form said outlet aperture of said nozzle.
7. The method of claim 3 wherein forcing said shaped mandrel includes locating said proximal end of said mandrel at a position beyond a portion of said slug identified to form said inlet aperture of said nozzle.
8. A method of forming a nozzle for a laser comprising:
placing a tube of metallic material into a die;
directing a shaped mandrel into said slug causing said slug to be extruded around said mandrel; and
applying an outward radial compressive force from said shaped mandrel onto said tube thereby defining an inner dimension of the nozzle.
9. The method of claim 8 wherein applying an outward radial compressive force causes an inward radial compressive force from said die onto said tube thereby defining an outer dimension of the nozzle.
10. The method of claim 9 wherein directing said shaped mandrel includes directing a distal end of said shaped mandrel through said tube and defining an outlet aperture of the nozzle.
11. The method of claim 10 wherein directing said shaped mandrel includes directing a proximal end of said shaped mandrel into said tube and defining an inlet aperture of the nozzle.
12. The method of claim 11 wherein applying said outward radial compressive force includes forcing said shaped mandrel through said tube whereby said shaped mandrel defines an engagement surface that tapers toward said distal end of said shaped mandrel.
13. The method of claim 12 wherein said engagement surface urges said tube into an inner geometry of said die.
14. The method of claim 10 wherein forcing said shaped mandrel includes locating said distal end of said mandrel at a position beyond a portion of said slug identified to form said outlet aperture of said nozzle.
15. The method of claim 11 wherein forcing said shaped mandrel includes locating said proximal end of said mandrel at a position beyond a portion of said slug identified to form said inlet aperture of said nozzle.
16. The method of claim 8 wherein said metallic material comprises oxygen-free copper.
17. A method of making a laser nozzle comprising:
placing a slug of oxygen-free copper into a die;
forcing a shaped mandrel into said slug causing said slug to be cold-formed around said mandrel; and
applying an outward radial compressive force from said shaped mandrel onto said tube thereby defining an inner dimension of the nozzle.
18. The method of claim 17 wherein forcing said shaped mandrel includes forcing a distal end of said shaped mandrel through said slug and defining an outlet aperture of the nozzle.
19. The method of claim 18 wherein forcing said shaped mandrel includes forcing a proximal end of said shaped mandrel into said slug and defining an inlet aperture of the nozzle.
20. The method of claim 19 wherein applying said radial compressive force includes forcing said shaped mandrel through said slug whereby said shaped mandrel defines an engagement surface that tapers toward said distal end of said shaped mandrel.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A magnetic core made of a mixed material including powder of an amorphous soft magnetic iron alloy and about 10% by volume or more of nonmagnetic inorganic powder, the amorphous soft magnetic iron alloy being expressed by the following composition:
Fe100-a-b-x-y-z-w-tCOaNibMxPyCzBwSit
wherein M is one or two or more elements selected from among Cr, Mo, W, V, Nb, Ta, Ti, Zr, Hf, Pt, Pd and Au, and a, b, x, y, z, w and t represent composition ratios satisfying 0 atom %\u2266x\u22663 atom %, 2 atom %\u2266y\u226615 atom %, 0 atom %\u2266z\u22668 atom %, 1 atom %\u2266w\u226612 atom %, 0.5 atom %\u2266t\u22668 atom %, 0 atom %\u2266a\u226620 atom %, 0 atom %\u2266b\u22665 atom %, and 70 atom %\u2266(100-a-b-x-y-z-w-t)\u226680 atom %.
2. The magnetic core according to claim 1, wherein a proportion of the nonmagnetic inorganic powder in the mixed material is about 20% by volume to about 50% by volume.
3. The magnetic core according to claim 2, wherein an average particle size of the nonmagnetic inorganic powder is about 1.0 \u03bcm to about 30 \u03bcm.
4. The magnetic core according to claim 1, wherein a magnetic path in the magnetic core is magnetically continuous.
5. The magnetic core according to claim 3, wherein a magnetic path in the magnetic core is magnetically continuous.