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21. 发明授权

US4850575A Apparatus for manufacturing a sintered body with high density 失效
标题翻译：用于制造高密度烧结体的装置
公开(公告)号：US4850575A
公开(公告)日：1989-07-25
申请号：US202716
申请日：1988-06-03
申请人： Hiroaki Nishio , Takeshi Kawashima
发明人： Hiroaki Nishio , Takeshi Kawashima
IPC分类号： C04B35/64 , B22F3/14 , B22F3/15 , C04B35/645 , F27B17/00
CPC分类号： B30B11/002 , B22F3/15
摘要： An apparatus for manufacturing a sintered body with high density comprises: a table having an object to be processed laid thereon; a pressure vessel accommodating a heat element heating the object around and a heat-insulating mantle surrounding the heat element; supply device for supplying to the pressure vessel an extractant which extracts a binder or a dispersion medium contained in the object, exhaust device for exhausting the extractant and an extracted substance from the pressure vessel; pressure device for raising a pressure in the pressure vessel, and vacuum means for evacuating the pressure vessel. The apparatus enables carrying out the three steps of drying or degreasing, sintering and hot isostatic pressing of the object once put in the pressure vessel without handling the object outside the vessel. The object is formed as a compact in the preprocess in advance of being put in the apparatus.

22. 发明授权

US4676949A Method of producing metal sinters 失效
标题翻译：生产金属烧结矿的方法
公开(公告)号：US4676949A
公开(公告)日：1987-06-30
申请号：US907980
申请日：1986-09-16
申请人： Tsuneo Miyashita , Hiroaki Nishio
发明人： Tsuneo Miyashita , Hiroaki Nishio
IPC分类号： B22F1/00 , B22F3/10 , C22C33/02
CPC分类号： B22F3/1003 , B22F1/0059 , C22C33/0235 , B22F2003/023
摘要： A tetrafluoroethylene-type fluoroplastic powder is added and mixed with a metal powder and the mixture is shaped. The compact is heated in a nonoxidizing atmosphere and the oxides on the surface of the metal particles are converted and removed as gaseous fluorides. Alternatively, after the oxides are converted to solid or liquid fluorides, the fluorides are reduced by hydrogen and then they are removed as gaseous reaction products. Thereafter, the compact is sintered.
摘要翻译：加入四氟乙烯型氟塑料粉末并与金属粉末混合，并将混合物成形。在非氧化气氛中加热压块，并将金属颗粒表面上的氧化物作为气态氟化物转化和除去。或者，在将氧化物转化为固体或液体氟化物之后，氟化物通过氢气还原，然后作为气态反应产物除去。之后，将该压块烧结。

23. 发明授权

US5633214A Boron nitride-containing material and method thereof 失效
标题翻译：含氮化硼的材料及其方法
公开(公告)号：US5633214A
公开(公告)日：1997-05-27
申请号：US494959
申请日：1995-06-26
申请人： Hiroaki Nishio , Hiroyuki Yoshida
发明人： Hiroaki Nishio , Hiroyuki Yoshida
IPC分类号： C01B21/064 , C01B21/072 , C04B35/583
CPC分类号： C01B21/0645 , C01B21/064 , C04B35/583 , C01P2004/61 , C01P2006/10 , C01P2006/14
摘要： A boron-nitride-containing material of multi-component system is obtained at a low cost by heating a mixed powder containing a boride and an oxide in a nitrifying atmosphere, whereby a part or the whole of the oxide is reduced with the element bonded to boron of the boride to convert the raw materials to one or more kinds of an oxide having less bonded oxygen, an acid nitride, a nitride, a carbide, and a boride and also boron nitride is formed. A sintered product of a boron-nitride-containing material is obtained by packing a mixed powder containing borides in a heat-resistant mold and heating the packed powders in a nitrifying atmosphere while restraining the packed powders by the mold. The sintered product is obtained in which neither expansion nor deformation occurred and no cracks formed.
摘要翻译：通过在硝化气氛中加热含有硼化物和氧化物的混合粉末，以低成本获得含有氮化硼的材料，由此一部分或全部氧化物被还原，元素结合到硼化物的硼，将原料转化成一种或多种具有较少结合氧的氧化物，氮化物，氮化物，碳化物和硼化物，并且还形成氮化硼。含氮化硼材料的烧结体是通过在耐热模具中填充含有硼化物的混合粉末，并且在通过模具抑制填充粉末的同时在硝化气氛中加热填充粉末而得到的。获得了既不膨胀也不发生变形并且不形成裂纹的烧结体。

24. 发明授权

US5250242A Method of producing ceramic sintered body having dense ceramic membrane 失效
标题翻译：具有陶瓷膜致密陶瓷烧结体的方法
公开(公告)号：US5250242A
公开(公告)日：1993-10-05
申请号：US623452
申请日：1990-12-18
申请人： Hiroaki Nishio , Keiji Watanabe , Michitaka Sato
发明人： Hiroaki Nishio , Keiji Watanabe , Michitaka Sato
IPC分类号： C04B41/80 , C04B35/645 , C04B41/50 , C04B41/52 , C04B41/85 , C04B41/87 , C04B41/89
CPC分类号： C04B41/009 , C04B35/6455 , C04B41/5025 , C04B41/52 , C04B41/87 , C04B41/89
摘要： A method of producing a ceramic sintered body having a ceramic membrane which comprises a process of applying a precursor capable of converting into a ceramic membrane having a new function through heating onto at least a portion of a ceramic porous body to impart said function of the surface of the ceramic porous body, a process of applying a precursor capable of converting into a gas-impermeable membrane through heating over the whole surface of the porous body, a process of forming the gas-impermeable membrane by heating, a process of conducting hot isostatic pressing to the porous body, and a process of removing said gas-impermeable membrane. Ceramic sintered bodies having a dense ceramic membrane on the surface can be produced efficiently in very short processes.

25. 发明授权

US5112577A Apparatus for removing dispersion medium in metal or ceramic molded body 失效
标题翻译：用于去除金属或陶瓷模体的分散介质的装置
公开(公告)号：US5112577A
公开(公告)日：1992-05-12
申请号：US578998
申请日：1990-09-07
申请人： Hiroaki Nishio
发明人： Hiroaki Nishio
IPC分类号： B22F3/10 , C04B35/632 , C04B35/638 , C23G5/04
CPC分类号： B22F3/1025 , C04B35/632 , C04B35/638 , C23G5/04
摘要： An apparatus for removing the dispersion medium in a metal or ceramic molded body which comprises a dispersion medium-removing vessel includes a condensing zone located in a upper part and a boiling zone located in a lower part, a separator to separater a solvent in the dispersion medium solution discharged from the vessel by heating the solution at a temperature higher than the boiling point of the solvent to evaporate it, the boiling zone being connected with the separator through a pipe to transport the dispersion medium solution and a pipe to transport the vaporized solvent to form a circuit, and a pump provided in the circuit. In the apparatus since the dispersion medium is removed in the boiling solvent, keeping a constant temperature is easy. The dispersion medium is promptly removed by contacting it with a solution of which the concentration of the dispersion medium is always low due to continuous removal of the dispersion medium in the separator. Since the boiling point of the solvent is about 20.degree. to 150.degree. C., the molded body is gently heated. Therefore, the occurrence of defects such as cracks is rare in the molded body.

26. 发明授权

US5091222A Method for forming a ceramic film 失效
标题翻译：形成陶瓷膜的方法
公开(公告)号：US5091222A
公开(公告)日：1992-02-25
申请号：US586801
申请日：1990-09-24
申请人： Hiroaki Nishio , Michitaka Sato , Keiji Watanabe
发明人： Hiroaki Nishio , Michitaka Sato , Keiji Watanabe
IPC分类号： C04B41/87 , B22F3/26 , C04B35/622 , C04B35/645 , C04B41/45 , C04B41/81 , C23C24/00
CPC分类号： C04B41/009 , B22F3/26 , C04B35/622 , C04B41/4535 , C04B41/4584 , C04B41/81
摘要： A method for forming a ceramic film comprises the steps of boiling a solution containing ceramics, dipping a base material into the solution, taking the base material out of the solution and drying the base material taken out of the solution in the presence of vapor of said boiling solution. The solution is a solution, in which ceramics is dispersed or dissolved. The solution is a solution, in which a precursor of ceramics is dispersed or dissolved.

27. 发明授权

US5080841A Hot isostatic pressing method 失效
标题翻译：热静压压制方法
公开(公告)号：US5080841A
公开(公告)日：1992-01-14
申请号：US538442
申请日：1990-06-15
申请人： Hiroaki Nishio
发明人： Hiroaki Nishio
IPC分类号： G01N33/20 , B22F3/14 , B22F3/15 , B30B11/00 , C04B35/645 , F27B17/00 , G01N33/38
CPC分类号： B22F3/15 , B30B11/001
摘要： In a hot isostatic pressing (HIP) method, only the probe of a dilatometer is set in the pressurized heating space of the HIP apparatus, and the probe is attached to a test piece having a greater specific surface area made of the same material as the body to be treated. The test piece is treated by HIP together with the body to be treated, and the beginning of the contraction of the test piece is detected by the dilatometer. Then, the body is densified by keeping the pressure and the temperature not lower than those at the beginning of contraction of the test piece. According to the method of the invention, since suitable HIP treating conditions are determined immediately, each body to be treated can be treated by only one HIP suitably without repeating the troublesome HIP process. Also, since the body can be treated by HIP without elevating the temperature beyond the necessary temperature, the crystal grain growth of the body to be treated can be inhibited.

28. 发明授权

US4935199A Process for producing high density sintered body 失效
标题翻译：高密度烧结体的制造方法
公开(公告)号：US4935199A
公开(公告)日：1990-06-19
申请号：US380066
申请日：1989-07-14
申请人： Hiroaki Nishio , Keiji Watanabe , Michitaka Satoh
发明人： Hiroaki Nishio , Keiji Watanabe , Michitaka Satoh
IPC分类号： H01L21/302 , B22F3/12 , C03C8/14 , C03C8/16 , C04B35/645 , H01L21/3065
CPC分类号： B22F3/1266 , C03C8/14 , C03C8/16 , C04B35/6455
摘要： In a process for producing a sintered body using a gas-impermeable membrane formed by softening of a powder layer provided on the surface of a porous body, a metal polymer selected from polysilanes, polycarbosilanes, polysilazanes and hydrolyzates of metal alkoxides is added as a binder to the powder layer. According to the process of the invention, the gas-impermeable membrane is formed with high reliability, and high density sintered bodies can be obtained in a simple process.
摘要翻译：在使用由多孔体表面上的粉末层软化而形成的不透气膜的烧结体的制造方法中，添加选自聚硅烷，聚碳硅烷，聚硅氮烷和金属醇盐的水解物的金属聚合物作为粘合剂到粉末层。根据本发明的方法，不可渗透膜形成的可靠性高，可以通过简单的工艺获得高密度烧结体。

29. 发明授权

US4927600A Method for molding of powders 失效
标题翻译：粉末成型方法
公开(公告)号：US4927600A
公开(公告)日：1990-05-22
申请号：US105985
申请日：1987-10-08
申请人： Tsuneo Miyashita , Hiroaki Nishio , Kazuya Yabuta , Yoshio Takagi
发明人： Tsuneo Miyashita , Hiroaki Nishio , Kazuya Yabuta , Yoshio Takagi
IPC分类号： B30B11/00 , B22F3/04 , B22F3/12 , B28B7/34 , B30B5/02
CPC分类号： B22F3/1233 , B22F3/04 , B28B7/342 , Y10S264/78
摘要： The invention is concerned with the method of compression molding a metallic or ceramic powders. The method includes the step of maintaining a negative pressure within a first mold of noncompactable powders for intimately contacting on its inner surface a pouch-like member of thin-walled resilient material for producing a second mold, and the step of compactly charging starting powders into the second mold and exhausting air from and sealing the second mold, taking out a pre-molded body of the metallis or ceramic powders together with the second mold and the step of processing the pre-molded body by a cold or hot isostatic press.
摘要翻译：本发明涉及压缩成型金属或陶瓷粉末的方法。该方法包括在不可压缩的粉末的第一模具内保持负压以在其内表面上紧密接触薄壁弹性材料的袋状构件以产生第二模具的步骤，以及将起始粉末紧密地装入第二模具和排出空气来自第二模具并且密封第二模具，与第二模具一起取出金属或陶瓷粉末的预成型体，以及通过冷或热等静压机加工预成型体的步骤。

30. 发明授权

US4843043A Method for manufacturing a sintered body with high density 失效
标题翻译：高密度烧结体的制造方法
公开(公告)号：US4843043A
公开(公告)日：1989-06-27
申请号：US163024
申请日：1988-03-02
申请人： Hiroaki Nishio
发明人： Hiroaki Nishio
IPC分类号： B22F3/12 , B22F3/14 , B22F3/15 , C04B35/589 , C04B35/593 , C04B35/645
CPC分类号： C04B35/645 , B22F3/125 , B22F3/1266 , C04B35/589 , C04B35/593 , C04B35/6455
摘要： A method is provided for manufacturing a sintered body comprising the steps of: heating a membrane of an inorganic polysilazane in liquid formed on the surface of a porous body to oxidize a surface portion of the layer into an oxide layer and still pyrolyzing the remaining of the inorganic polysilazane, the inorganic polysilazane having the formula of (--SiH.sub.2 NH--)n where n represents the degree of polymerization; softening the oxide layer to make it impermeable; and sintering the porous body with the oxide layer having impermeability at high pressure and at high temperature n of degree of polymerization ranges 6 to 25. The layer is of 0.5 to 2.0 mm in thickness.

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