Method of passivating a gas vessel or component of a gas transfer system using a silicon overlay coating
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
B65D-085/00
C23C-008/06
B32B-015/00
출원번호
US-0259656
(1999-02-26)
발명자
/ 주소
Barone, Gary A.
Schuyler, Andy S.
Stauffer, Joseph
출원인 / 주소
Restek Corporation
대리인 / 주소
Earley, John F. A.Earley, III, John F. A.Harding, Earley, Follmer & Frailey
인용정보
피인용 횟수 :
37인용 특허 :
6
초록▼
A method of passivating the interior surface of a gas storage vessel to protect the surface against corrosion. The interior surface of the vessel is first dehydrated and then evacuated. A silicon hydride gas is introduced into the vessel. The vessel and silicon hydride gas contained therein are heat
A method of passivating the interior surface of a gas storage vessel to protect the surface against corrosion. The interior surface of the vessel is first dehydrated and then evacuated. A silicon hydride gas is introduced into the vessel. The vessel and silicon hydride gas contained therein are heated and pressurized to decompose the gase. A layer of silicon is deposited on the interior surface of the vessel. The duration of the silicon depositing step is controlled to prevent the formation of silicon dust in the vessel. The vessel is then purged with an inert gas to remove the silicon hydride gas. The vessel is cycled through the silicon depositing step until the entire interior surface of the vessel is covered with a layer of silicon. The vessel is then evacuated and cooled to room temperature.
대표청구항▼
A method of passivating the interior surface of a gas storage vessel to protect the surface against corrosion. The interior surface of the vessel is first dehydrated and then evacuated. A silicon hydride gas is introduced into the vessel. The vessel and silicon hydride gas contained therein are heat
A method of passivating the interior surface of a gas storage vessel to protect the surface against corrosion. The interior surface of the vessel is first dehydrated and then evacuated. A silicon hydride gas is introduced into the vessel. The vessel and silicon hydride gas contained therein are heated and pressurized to decompose the gase. A layer of silicon is deposited on the interior surface of the vessel. The duration of the silicon depositing step is controlled to prevent the formation of silicon dust in the vessel. The vessel is then purged with an inert gas to remove the silicon hydride gas. The vessel is cycled through the silicon depositing step until the entire interior surface of the vessel is covered with a layer of silicon. The vessel is then evacuated and cooled to room temperature. n: said heating or cooling means are passages for traversal of a heating or cooling fluid. 6. The apparatus in accordance with claim 1 wherein: said heating means are internal electric heating elements. 7. An apparatus for the precise thermal treatment of a material selected from the group consisting of sheets of glass, semiconductor substrates, chemical compounds and biological materials, comprising; a first outer plate, a core construction having a first face adjacent said first outer plate and a second face adjacent a second outer plate and including heating or cooling means substantially positioned within a central plane located between said first face and said second face, and said second outer plate in overlying relationship, wherein said first outer plate and said second outer plate each have an abutting surface adjacent said core construction, each of said abutting surfaces containing a thin layer of a brazing alloy deposited thereon, and wherein said first and second outer plates are of a size which is peripherally larger than said core construction; wherein said apparatus is formed by first edge welding said first outer plate and said second outer plate thereby forming a sealed pouch enclosing said core construction; subsequently attaching to one of said outer plates an evacuation tube in fluid communication with an interior area of said pouch; evacuating said interior area by fluidly coupling a sour e of vacuum to said evacuation tube; and furnace brazing said evacuated sealed pouch by heating to a temperature sufficient to liquify said brazing alloy within a controlled atmosphere furnace, wherein differential pressure creates a dynamic loading condition; whereby a bonded unitary multi-laminar element containing substantially no voids between said elements is formed. 8. The apparatus in accordance with claim 7 wherein: said core construction is a platelet stack including a plurality of sheets laminated together with suitable brazing alloy interleaved therebetween. 9. The apparatus in accordance with claim 7 wherein: said brazing alloy is selected from the group consisting of powdered metal alloys, binary alloys, ternary alloys, silver/copper eutectic alloys, and nickel/phosphorus eutectic alloys. 10. The apparatus in accordance with claim 7 wherein: said multi-laminar elements are flat. 11. The apparatus in accordance with claim 7 wherein: said heating or cooling means are passages for traversal of a heating or cooling fluid. 12. The apparatus in accordance with claim 7 wherein: said heating means are internal electric heating elements. 13. An apparatus for the precise thermal treatment of a material selected from the group consisting of sheets of glass, semiconductor substrates, chemical compounds and biological materials comprising: positioning a first outer plate, a core construction having a first face adjacent said first outer plate and a second face adjacent a second outer plate and including heating or cooling means substantially positioned within a central plane located between said first face and said second face, and said second outer plate in overlying relationship, wherein said core construction first face and second face each respectively define first and second abutting surfaces adjacent said first outer plate and said second outer plate respectively, each of said abutting surfaces containing a thin layer of a brazing alloy deposited thereon, and wherein said first and second outer plates are of a size which is peripherally larger than said core construction; wherein said apparatus is formed by first edge welding said first outer plate and said second outer plate thereby forming a sealed pouch enclosing said core construction; subsequently attaching to one of said outer plates an evacuation tube in fluid communication with an interior area of said pouch; evacuating said interior area by fluidly coupling a source of vacuum to said evacuation tube; and furnace brazing said evacuated sealed pouch by heating to a temperature sufficient to liquify said brazing alloy within a controlled atmosphere furnace, wherein differential pressure creates a dynamic loading condition; whereby a bonded unitary multi-laminar element containing substantially no voids between said elements is formed. 14. The apparatus in accordance with claim 13 wherein: said core construction is a platelet stack including a plurality of sheets laminated together with suitable brazing alloy interleaved therebetween. 15. The apparatus in accordance with claim 13 wherein: said brazing alloy is selected from the group consisting of powdered metal alloys, binary alloys, ternary alloys, silver/copper eutectic alloys, and nickel/phosphorus eutectic alloys. 16. The apparatus in accordance with claim 13 wherein: said multi-laminar elements are flat. 17. The apparatus in accordance with claim 13 wherein: said heating or cooling means are passages for traversal of a heating or cooling fluid. 18. The apparatus in accordance with claim 13 wherein: said heating means are internal electric heating elements. 19. A multi-laminar apparatus having high thermal conductivity throughout its surface for the precise thermal treatment of a substrate, said apparatus comprising a core having a periphery and first and second planar surfaces with central passages in said planar surfaces, electric heating means seated in said passages for providing a thermal heat source, a first outer plate having an inner surface larger than said first planar surface of said core, said inner surface of said first outer plate in contact with said first surface of said core throughout said first surface of said core, a second outer plate having an inner surface larger than said second planar surface of said core, said inner surface of said second outer plate in contact with said second surface of said core throughout said second surface of said core, said larger inner surface of said first outer plate and said larger inner surface of said second outer plate in contact with each other outside said first and second surfaces of said core, said first and second surfaces of said core and said first inner surface of said first outer plate and said inner surface of said second outer plate being brazed together throughout the area of contact, said larger inner surface of said first outer plate and said larger inner surface of said second outer plate being brazed together throughout the area of contact, a portion of said electric heating means fixed in said passages by said brazing. 20. A multi-laminar apparatus of claim 19 wherein said first outer plate has a periphery, said second outer plate has a periphery, said periphery of said first outer plate, said second outer plate and said core are welded together. 21. A multi-laminar apparatus of claim 19 wherein said core includes tubular channel means for introducing heating or cooling fluids.
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