-
公开(公告)号：JPH02125199A
公开(公告)日：1990-05-14
申请号：JP27650088
申请日：1988-11-01
Applicant: AGENCY IND SCIENCE TECHN
Inventor： ASAHINA TADASHI , TAJIRI KOJI , NISHIO TOSHIYUKI , YAMADA YASUO
Abstract: PURPOSE:To sharply reduce the liquid nitrogen usage quantity by feeding nitrogen gas in a Dewar bottle and making the inner pressure the same as the pressure of the ambient air or slightly higher at the time of the ordinary operation in the Dewar bottle for a charged particle detector or the like. CONSTITUTION:An object to be cooled 2 in a Dewar bottle 3 is immersed in liquid nitrogen 1, and the cold end 10 of a helium gas circulation type adiabatic expansion refrigerator is fitted to the upper port of the Dewar bottle 3 with an O-ring seal 9. After the operation of the refrigerator is started, the nitrogen gas of a nitrogen gas cylinder 12 is fed into the Dewar bottle 3 while being controlled by a pressure reducing flow control valve 11 so that the inner pressure is made the same as the pressure of the ambient air or slightly higher. The valve 11 is closed after the temperature equilibrium is attained, and the operation of only the refrigerator is continued. The usage quantity of liquid nitrogen is sharply reduced, and the maintenance and management can be simplified.
-
公开(公告)号：JP2000265226A
公开(公告)日：2000-09-26
申请号：JP6957899
申请日：1999-03-16
Applicant: AGENCY IND SCIENCE TECHN
Inventor： KOBAYASHI KEIZO , SUGIYAMA AKIRA , MATSUMOTO AKIHIRO , NISHIO TOSHIYUKI , OZAKI KOYO
Abstract: PROBLEM TO BE SOLVED: To provide a technique of manufacturing an alloy powder composed essentially of titanium by a mechanical alloying method in high efficiency and also to provide a solidification and forming technique causing no deterioration in the functional property of the alloy. SOLUTION: In the method for synthesizing an alloy powder containing >=50 atomic % titanium, a magnesium powder in an amount of
-
公开(公告)号：JPH11323402A
公开(公告)日：1999-11-26
申请号：JP14655898
申请日：1998-05-11
Applicant: AGENCY IND SCIENCE TECHN
Inventor： SUGIYAMA AKIRA , KOBAYASHI KEIZO , OZAKI KOYO , NISHIO TOSHIYUKI
Abstract: PROBLEM TO BE SOLVED: To provide a method for finely dispersing a magnesium-silicon compound thermoelectric material, ceramics hollow particles, ceramics particles, etc., in an iron-silicon compound thermoelectric material. SOLUTION: A powdery mixture which comprises iron powder, silicon powder, cobalt powder and their inevitable metallic elements, in which atomic ratio of silicon to iron is 1:2 and 2 to 16% in atomic ratio of iron atoms are replaced with cobalt atoms and a powdery mixture in which atomic ratio of silicon to magnesium is 2:1 are simultaneously compounded at 5:1 to 1:1 by weight ratio and are subjected to a mechanical alloying treatment. Further the ceramics hollow particles are added to an obtained powder so as to be 20:1 to 1:1 by a weight ratio and then the mixture is subjected to the mechanical alloying treatment to produce a powdery mixture in which clear generation of ferrous-silicon compounds is suppressed. The obtained powder is sintered to obtain a sintered compact in which iron disilicide and magnesium silicide are alloyed at nanometer level or a sintered compact in which ceramics hollow particles are uniformly dispersed.
-
公开(公告)号：JPH07268517A
公开(公告)日：1995-10-17
申请号：JP8585194
申请日：1994-03-30
Applicant: AGENCY IND SCIENCE TECHN
Inventor： KOBAYASHI KEIZO , NISHIO TOSHIYUKI , MIWA KENJI
Abstract: PURPOSE:To easily obtain a lightweight heat resistant material without impairing the characteristics of a Ti alloy by casting an Al-contg. Ti alloy together with BN and making the crystal grains thereof finer. CONSTITUTION:The Ti alloy consisting essentially of Ti and contg. Al is cast together with BN, more preferably hexagonal BN powder of about
-
公开(公告)号：JPH05345319A
公开(公告)日：1993-12-27
申请号：JP1982192
申请日：1992-02-05
Applicant: AGENCY IND SCIENCE TECHN , UNITIKA LTD
Inventor： KITANO TAKESHI , AOKI EIJI , NISHIO TOSHIYUKI , MURATA TSUYOSHI , MOCHIZUKI MASATSUGU
IPC: B29B11/16 , B29B15/08 , B29C43/20 , B29C51/08 , B29C51/12 , B29C70/10 , B29K105/06 , C08J5/04 , B29C67/14
Abstract: PURPOSE:To simultaneously satisfy the execution of efficient industrial production and the acquisition of composite material, in which no ply separation develops and which is excellent in physical properties. CONSTITUTION:The fiber reinforced thermoplastic composite material to be provided has three-dimensional fabric consisting of high strength and highly elastic fibers, at least one or more kinds of which have higher melting point and/or decomposition point than those of matrix component as reinforcing fiber component, and one or more kinds of thermoplastic resin fiber as matrix component as the intermediate of a molding.
-
Patent Agency Ranking
公开(公告)号：JPH02236444A
公开(公告)日：1990-09-19
申请号：JP5627789
申请日：1989-03-10
Applicant: AGENCY IND SCIENCE TECHN , HIROSHIMA PREFECTURE
Inventor： YASUE KAZUO , NISHIO TOSHIYUKI , YAMADA YASUO , SUZUKI HIROSHI
Abstract: PURPOSE:To rapidly execute temp. control and to determine a constant-temp. transformation curve of high accuracy by using a cooling medium having a large cooling power and making transformation measurement by a non-contact type system using magnetic force. CONSTITUTION:A high-temp. heating furnace 19 is heated up to the austenite area of about 900 deg.C and a sample is hung by a stainless steel wire 22 down to the position shown by 8b and is fixed by means of a clip 23. After the sample is held for a prescribed period of time, the clip 23 is removed to allow the sample to fall into a salt bath. The falling time of this time is recorded by a photoelectric tube and is determined as the time for starting the measurement of a change in the magnetic force. The sample is immediately cooled and the constant- temp. transformation is started. The magnetism of the sample is increased by the transformation in such a manner and the loss of weight generated by attracting a magnet 2 is indicated on a balance 1 and is displayed on a recorder. Since the balance 1 is of an electromagnetic balance type, the position of a tray is not displaced in a vertical direction even if the load changes. the distance between the sample and the magnet 5 does not, therefore, change and the influence on the load is not affected. The constant-temp. transformation curve of the high accuracy is obtd. in this way.
-
17.发明专利
公开(公告)号：JP2000277815A
公开(公告)日：2000-10-06
申请号：JP8275999
申请日：1999-03-26
Applicant: AGENCY IND SCIENCE TECHN
Inventor： SUGIYAMA AKIRA , KOBAYASHI KEIZO , MATSUMOTO AKIHIRO , OZAKI KOYO , NISHIO TOSHIYUKI
Abstract: PROBLEM TO BE SOLVED: To obtain a method for dispersing short thin metallic wires in a thermoelectric material composed of a magnesium-silicon compound and a thermoelectric material having superior thermoelectric characteristic. SOLUTION: A magnesium-silicon compound sintered body, in which short and thin metallic wires are uniformly scattered is obtained, in such a way that mixed powder in which the formation of a magnesium-silicon compound is clearly confirmed by X-ray diffraction is manufactured by mechanically alloying magnesium powder, silicon powder, and their inevitable metallic elements at an atomic ratio of 2:1 between magnesium atoms and silicon atoms. Then, after the short and thin metallic wires are mixed in the mixed powder at a rate of 5-30 vol.% with respect to 100 vol.% powder and the powder is dried, the powder is sintered under pressure.
-
公开(公告)号：JPH1190615A
公开(公告)日：1999-04-06
申请号：JP27533097
申请日：1997-09-22
Applicant: AGENCY IND SCIENCE TECHN , SHIN ENERGY SOGO KAIHATSU KIKO
Inventor： MIWA KENJI , NISHIO TOSHIYUKI , RAJIYAI ARIREZA
Abstract: PROBLEM TO BE SOLVED: To provide a method for fining metallographic structure. SOLUTION: This method for fining the metallographic structure is the one, in which cavitations (voids) in the molten metal are formed by giving high energy vibrating force to the metal during solidifying, newly formed solid crystal grains are crushed and decomposed with impact pressure generated when the cavitations disappear to fine the structure of the material. For example, in a device composed of electrodes 11 which applies AC current to a metallic sample 10 and an electromagnet 12 which impresses DC magnetic field, a high energy electromagnetic vibrating force is given to the metallic sample during the processing of the solidification by simultaneously impressing the electric current and the magnetic field, and the solid crystal grains are crushed and decomposed to execute the formation of the fine structure.
-
公开(公告)号：JPH08232027A
公开(公告)日：1996-09-10
申请号：JP3554495
申请日：1995-02-23
Applicant: AGENCY IND SCIENCE TECHN , NIPPON STEEL CORP
Inventor： OZAKI KOYO , KOBAYASHI KEIZO , NISHIO TOSHIYUKI , SHINBARA TERUO
Abstract: PURPOSE: To produce a bulky (solid) material solidified by quick cooling, e.g. an amorphous alloy and to extend the application range of the material. CONSTITUTION: Starting material having a prescribed compsn. is melted, mixed and primarily solidified in a bulky state and the surface of the resultant solidified formed body is coated with a thin coating film having a higher m.p. than the solidified body. The coated solidified formed body is heated to a temp. above the m.p. of the solidified body and below the m.p. of the coating material and then it is solidified by quick cooling. The objective bulky material solidified by quick cooling is obtd. and the application range of the material is considerably extended.
-
公开(公告)号：JPH08103858A
公开(公告)日：1996-04-23
申请号：JP26135494
申请日：1994-09-30
Applicant: AGENCY IND SCIENCE TECHN
Inventor： NISHIO TOSHIYUKI , KOBAYASHI KEIZO , MIWA KENJI
Abstract: PURPOSE: To easily enable the formation of a material having uniform quality without defect by controlling fluid condition at the time of filling up a base material of solid-liquid coexistence in a mold through a porous body. CONSTITUTION: The solid-liquid coexisting material 3 is held in a container 2 of a solid-liquid coexisting body holding part (a) and pressed in the metallic mold 5 of a forming part (b) fitted with a stainless steel-made wire net 4 with a piston 1 and formed. The fluid condition of the metal material in the solid- liquid coexisting state is controlled at the time of filling the solid-liquid coexisting material 3 into the mold of the metallic mold 5, etc., through the porous body like wire net 4, etc., to restrain the entrapment of atmospheric gas into the forming body. The material 3 is made to be one kind selected from the metal or complex material containing metal and ceramic and/or plastic. By this method, the grain distribution and the shape of solid phase grains can be controlled.
-
-
-
-
-
-
-
-
-
Search Results
24
records
(took 0.025 seconds)
