Claims
- 1. A method for manufacturing a composite structure comprising the steps of:
- coating particles of a metal powder with a thin layer of an inorganic bonding media, said inorganic bonding media selected from at least one of the group of powders consisting of a ceramic, glass, and glass-ceramic;
- assembling said particles in a cavity;
- applying heat to said particles in a vacuum until the layer of inorganic bonding media forms a strong bond with the particles and with the layer of inorganic bonding media on adjacent particles, whereby a strong composite structure is formed.
- 2. The method according to claim 1 wherein the inorganic bonding media and particles of metal powder are densified through the application of pressure.
- 3. The method according to claim 2 wherein said heat and pressure are applied using a uniaxial hot pressing process.
- 4. The method according to claim 3 wherein said cavity is defined by a graphite die.
- 5. The method according to claim 2 wherein said heat and pressure are applied using gas pressure in a hot isostatic pressing process.
- 6. The method according to claim 1 wherein said metal particles are comprised of a magnetic alloy.
- 7. The method according to claim 1 wherein said bonding media has a coefficient of thermal expansion which approximates that of said metal particles.
- 8. The method according to claim 1 wherein a surface of said metal particles is oxidized or otherwise pretreated prior to the step of coating said metal particles with said inorganic bonding media.
- 9. A method for manufacturing a composite structure comprising the steps of:
- coating particles of a metal powder with a thin layer of an inorganic bonding media, said inorganic bonding media selected from at least one of the group of powders consisting of a ceramic, glass, and glass-ceramic;
- assembling said particles in a cavity;
- compacting said particles by applying pressure using a uniaxial cold pressing process;
- heating said compacted body in a vacuum until the layer of inorganic bonding media forms a strong bond with the particles and with the layer of inorganic bonding media on adjacent particles, whereby a strong composite structure is formed.
- 10. The method according to claim 1 wherein said particles of metal powder comprise an alloy of Fe--Co and at least one of the group consisting of Ti, Zr, Hf, V, Nb, and Ta.
- 11. The method according to claim 9 wherein said particles of metal powder comprise an alloy of Fe--Co and at least one of the group consisting of Ti, Zr, Hf, V, Nb, and Ta.
- 12. A method for manufacturing a composite structure comprising the steps of:
- coating particles of a metal powder with a thin layer of an inorganic bonding media, said inorganic bonding media selected from at least one of the group of powders consisting of glass and glass-ceramic;
- assembling said particles in a cavity;
- applying heat to said particles until the layer of inorganic bonding media forms a strong bond with the particles and with the layer of inorganic bonding media on adjacent particles, whereby a strong composite structure is formed.
- 13. The method according to claim 11 wherein the inorganic bonding media and particles of metal powder are densified through the application of pressure.
- 14. The method according to claim 13 wherein said heat and pressure are applied using a uniaxial hot pressing process.
- 15. The method according to claim 14 wherein said cavity is defined by a graphite die.
- 16. The method according to claim 13 wherein said heat and pressure are applied using gas pressure in a hot isostatic pressing process.
- 17. The method according to claim 12 wherein said metal particles are comprised of a magnetic alloy.
- 18. The method according to claim 17 wherein said magnetic alloy comprises Fe--Co and at least one of the group consisting of Ti, Zr, Hf, V, Nb, and Ta.
- 19. The method according to claim 12 wherein said bonding media has a coefficient of thermal expansion which approximates that of said metal particles.
- 20. The method according to claim 12 wherein a surface of said metal particles is oxidized or otherwise pretreated prior to the step of coating said metal particles with said inorganic bonding.
CROSS REFERENCE TO RELATED APPLICATIONS
This is a Divisional of application Ser. No. 08/929,412 filed Sep. 15, 1997.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT
This invention was made with government support under contract DE-AC05-96OR22464, awarded by the United States Department of Energy to Lockheed Martin Energy Research Corporation, and the United States Government has certain rights in this invention.
US Referenced Citations (17)
Non-Patent Literature Citations (2)
Entry |
Randall M. German, "Sintering Theory and Practice," pp. 350, 353, 355, 366. |
"Engineered Materials Handbook," Ceramics and Glasses, vol. 4, pp. 495-497, 499. |
Divisions (1)
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Number |
Date |
Country |
Parent |
929412 |
Sep 1997 |
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