IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0906208
(2001-07-16)
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발명자
/ 주소 |
- Kumar, Prabhat
- Aimone, Paul
- Balliett, Robert W.
- Parise, Anthony V.
- Ramlow, Thomas M.
- Uhlenhut, Henning
|
출원인 / 주소 |
|
대리인 / 주소 |
Gil, Joseph C.Eyl, Diderico van
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인용정보 |
피인용 횟수 :
48 인용 특허 :
9 |
초록
▼
A method of making sheet bar and other precursors of formed products to be made by extensive working. The method includes providing a powder metal, preferably under 100 PPM oxygen content of non-spherical particles, compacting the powder into a coherent precursor form of at least 100 pounds, whereby
A method of making sheet bar and other precursors of formed products to be made by extensive working. The method includes providing a powder metal, preferably under 100 PPM oxygen content of non-spherical particles, compacting the powder into a coherent precursor form of at least 100 pounds, whereby a precursor is provided enabling extended fabrication to a finished product form. The finished product is resistant to breakup in fabrication due to oxide inclusion effect and produces a low oxygen end product. The method can process multiple species of metals that include at least one higher melting metal and one lower melting metal to produce an alloy or micro-composite of the metals as worked, where one metal is preferably a refractory metal (Ta, Nb, W, Wo, Zr, Hf, V and Re). The process is controlled to cause powder of the higher melting metal to be extended into a fibrous form.
대표청구항
▼
1. A method of making sheet bar and other precursors of formed products to be made by extensive working comprising the steps: providing a metal as a powder under 300 PPM oxygen content of non-spherical particles, wherein the metal is selected from the group consisting of hafnium, molybdenum, niob
1. A method of making sheet bar and other precursors of formed products to be made by extensive working comprising the steps: providing a metal as a powder under 300 PPM oxygen content of non-spherical particles, wherein the metal is selected from the group consisting of hafnium, molybdenum, niobium, rhenium, tantalum, tungsten, vanadium, zirconium and alloys of said metals with each other and/or other metals, compacting the powder into a coherent precursor form of at least 40 pounds, and fabricating the precursor to a finished product form. 2. The method in accordance with claim 1, wherein multiple species of metals are provided in powder form as a mixture, wherein the multiple species include at least one higher melting metal and one lower melting metal to produce an alloy or micro-composite of the metals as worked, and the higher melting metal is selected from the group consisting of hafnium, molybdenum, niobium, rhenium, tantalum, tungsten, vanadium, zirconium and alloys of said metals with each other and/or other metals. 3. The method in accordance with either claim 1 or 2, compacting the powder into the coherent precursor form of at least 100 pounds. 4. The method in accordance with either claim 1 or 2, providing the powder under 200 PPM oxygen content. 5. The method in accordance with either claim 1 or 2, providing the powder under 100 PPM oxygen content. 6. The method in accordance with either claim 1 or 2, wherein the finished product is a sheet. 7. The method in accordance with either claim 1 or 2, wherein the finished product is a foil. 8. The method in accordance with either claim 1 or 2, wherein the finished product is a plate. 9. The method in accordance with either claim 1 or 2, wherein the finished product is a wire. 10. The method in accordance with either claim 1 or 2, wherein the finished product is a rod. 11. The method in accordance with either claim 1 or 2, wherein the finished product is a disk. 12. The method in accordance with either claim 1 or 2, wherein the finished product is a bar. 13. The method in accordance with either claim 1 or 2, further comprising the step of fabricating the finished product to a finished part. 14. The method of claim 13, wherein the finished part is a sputtering target. 15. The method of claim 13, wherein the finished part is a seamless complex curved form. 16. The method of claim 13, wherein the finished part is a disk. 17. A method of making sheet bar and other precursors of formed products to be made by extensive working comprising the steps: providing a niobium metal as a powder under 300 PPM oxygen content of non-spherical particles, compacting the powder into a coherent precursor form of at least 25 pounds, and fabricating the precursor to a finished product form. 18. The method in accordance with claim 17, wherein multiple species of metals are provided in powder form as a mixture, wherein the multiple species include at least one higher melting metal and one lower melting metal to produce an alloy or micro-composite of the metals as worked, and the higher melting metal is the niobium metal. 19. The method in accordance with either claims 17 or 18, providing the powder under 200 PPM oxygen content. 20. The method in accordance with either claim 17 or 18, providing the powder under 100 PPM oxygen content.
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