-
公开(公告)号：JP2007002289A
公开(公告)日：2007-01-11
申请号：JP2005182690
申请日：2005-06-22
Applicant: NAT INST FOR MATERIALS SCIENCE
Inventor： KIYU UMI , NISHIMURA TOSHIYA , HIRAOKA KAZUO
Abstract: PROBLEM TO BE SOLVED: To provide a weld joint having controlled and improved bond hardness and bond notch toughness even when having a high carbon-equivalent composition, by adding a larger amount of Al and Si elements which are not included in or do not give remarkable influence on a carbon equivalent formula and a P CM formula but work for forming ferrite than those contained in a conventional steel for a welded structure. SOLUTION: This weld joint is formed by welding a steel for the welded structure which has a basic composition expressed by Fe-C-Mn-Si-Al, and comprises 0.03-0.3 wt.% C, 0.5-2.5 wt.% Mn, 0.15-2.5 wt.% Si, 0.01-1.5 wt.% Al, P restricted to less than 0.15 wt.%, S restricted to less than 0.05 wt.%, and unavoidable impurities; and has the bond notch toughness of 27 J or higher at 0°C and the bond hardness of 400 HV or lower. COPYRIGHT: (C)2007,JPO&INPIT
-
公开(公告)号：JP2006348385A
公开(公告)日：2006-12-28
申请号：JP2006177981
申请日：2006-06-28
Applicant: NAT INST FOR MATERIALS SCIENCE
Inventor： YAMADA KATSUMI , OKADA KOICHI , MUNEKI MASAICHI , ABE FUJIO
Abstract: PROBLEM TO BE SOLVED: To provide an MX carbonitride precipitation-strengthened heat-resistant steel which is a heat-resistant steel utilizing a strengthening mechanism by the precipitation of carbonitride and in which the high-temperature creep strength at 600 to 650°C is improved. SOLUTION: The MX carbonitride precipitation-strengthened heat-resistant steel utilizes a strengthening mechanism by the precipitation of MX carbonitride and has the improved high-temperature creep strength at 600 to 650°C, wherein the content of a compound MX carbonitride comprising NbC (TaC) and VN is restricted to below 30% by weight with respect to the entire precipitated MX carbonitride. COPYRIGHT: (C)2007,JPO&INPIT
-
3.发明专利
公开(公告)号：JP2006224231A
公开(公告)日：2006-08-31
申请号：JP2005039596
申请日：2005-02-16
Applicant: NAT INST FOR MATERIALS SCIENCE
Inventor： SHIBAMOTO KOHEI , KITAJIMA MASAHIRO , MOHAMMAD KAMAL HOSSAIN , ISHIOKA KUNIE
Abstract: PROBLEM TO BE SOLVED: To provide a simple method for producing a monolayer array structure from only a colloid solution of metal nanoparticles without limitation of particle diameters of the metal nanoparticles and without using surface modification molecules for the metal nanoparticles. SOLUTION: The method for producing a monolayer array structure from a metal nanoparticle colloid solution is characterized in that: the colloid solution of metal nanoparticles is sandwiched between two smooth substrates held at a constant distance from each other; the solution is dried while decreasing curvature of a drop surface; or dried while the contact area between the sandwiched metal nanoparticle colloid solution and the smooth substrates and the number of metal nanoparticles per unit contact area. COPYRIGHT: (C)2006,JPO&NCIPI
-
公开(公告)号：JP2004011899A
公开(公告)日：2004-01-15
申请号：JP2002170641
申请日：2002-06-11
Applicant: NAT INST FOR MATERIALS SCIENCE
Inventor： NAKATANI ISAO
Abstract: PROBLEM TO BE SOLVED: To provide a magnetic fluid sealed rotary shaft mechanism restricted in a rotating resistance during the rotation and restricted in the torque when starting the rotation. SOLUTION: Single annular projection 3 or a plurality of annular projections 3 arranged in the axial direction of a rotary shaft are provided from the peripheral surface of the rotary shaft 1 formed from a magnetic body toward the inner peripheral surface of a bearing 2, and a magnetic field concentrates between the projections and the inner peripheral surface of the bearing to magnetically hold the magnetic fluid 4 in a clearance formed in this part. In this magnetic fluid sealed rotary shaft mechanism, outline of a cross section of the projection is formed into a part of an ellipse or a curve similar to an ellipse. COPYRIGHT: (C)2004,JPO
-
公开(公告)号：JP2004010389A
公开(公告)日：2004-01-15
申请号：JP2002163746
申请日：2002-06-05
Inventor： YOSHII MASAMOTO , MIZUKI JUNICHIRO , ABE HIDEKI , KITAZAWA HIDEAKI , MATSUSHITA AKIYUKI
Abstract: PROBLEM TO BE SOLVED: To provide a method for synthesizing MgB 2 in a thin film from a melt by electrodeposition using a simple device structure. SOLUTION: The method for synthesizing the superconducting boride MgB 2 from a melt by electrodeposition comprises filling a powder mixture obtained by adding a magnesium borate to a mixture of magnesium halide and potassium chloride into a refractory boat, inserting negative and positive electrodes into the mixture, heating them in a heating furnace under an inert gas atmosphere for melting to form a melt, applying direct current between both electrodes, and depositing MgB 2 on the negative electrode. COPYRIGHT: (C)2004,JPO
-
Patent Agency Ranking
公开(公告)号：JP2004008634A
公开(公告)日：2004-01-15
申请号：JP2002168588
申请日：2002-06-10
Applicant: JAPAN SCIENCE & TECH CORP , NAT INST FOR MATERIALS SCIENCE
Inventor： TANAKA JUNZO , TAGUCHI TETSUSHI
Abstract: PROBLEM TO BE SOLVED: To provide a scaffolding material for effectively regenerating the interface of a hard tissue and a soft tissue and to provide an implant capable of sufficiently filling a hard tissue-soft tissue defficient part by utilizing the scaffolding material. SOLUTION: A biodegradable polymeric material is dipped in a calcium ion-containing solution and a phosphate ion-containing solution to add calcium phosphate to the interior of the biodegradable polymeric material in a gradient state. The biodegradable polymeric material is utilized as a scaffold to regenerate the hard tissue-soft tissue interface. COPYRIGHT: (C)2004,JPO
-
7.发明专利
公开(公告)号：JP2003260368A
公开(公告)日：2003-09-16
申请号：JP2002062474
申请日：2002-03-07
Applicant: NAT INST FOR MATERIALS SCIENCE
Inventor： EBINA YASUO , SASAKI TAKAYOSHI , WATANABE JUN
IPC: B82B1/00 , B01J23/648 , B01J23/847 , B01J35/02 , B01J37/00 , B82B3/00 , C01B3/04 , C01B13/02 , C01G23/04 , C01G33/00
Abstract: PROBLEM TO BE SOLVED: To provide a catalyst, in particular, a photocatalyst having higher efficiency and higher activity compared with a conventional one by using a layer compound. SOLUTION: The layer reconstructed aggregate features that flake-like particles (nanosheet) obtained by exfoliating the microcrystals of a layer compound are reconstructed into layers with monovalent or polyvalent cations inserted into the layers. The aggregate has a photocatalytic function to produce hydrogen and oxygen or at least hydrogen from water when irradiated with light. The aggregate is obtained by dispersing the flake-like particles obtained by exfoliating the microcrystals of a layer compound to prepare a colloidal solution, mixing the colloidal solution with an aqueous solution containing an excess amount of monovalent or polyvalent cations to deposit the thin particles and the cations into layers. COPYRIGHT: (C)2003,JPO
-
8.发明专利
公开(公告)号：JP2003253397A
公开(公告)日：2003-09-10
申请号：JP2002104524
申请日：2002-02-28
Applicant: NAT INST FOR MATERIALS SCIENCE
Inventor： YAMADA KATSUMI , MUNEKI MASAICHI , OKADA KOICHI , IGARASHI MASAAKI , ABE FUJIO
Abstract: PROBLEM TO BE SOLVED: To improve a high-temperature creep property in a temperature range of 650°C or higher of a martensitic heat-resistant steel, enable the higher high- temperature creep property to be kept for a long time, make the thermal expansion characteristics in the temperature range of 650°C or higher to be low, and improve the thermal fatigue characteristics. SOLUTION: In the martensitic heat-resistant steel having a martensite single- phase structure at room temperature, in which carbides do not precipitate, a structure in the temperature range of 650°C or higher has two-phases comprising an austenitic phase of a parent phase and a finely dispersed and precipitated intermetallic compound phase, or three phases comprising the austenitic phase of the parent phase, a ferritic phase and the finely dispersed and precipitated intermetallic compound phase. COPYRIGHT: (C)2003,JPO
-
9.发明专利
公开(公告)号：JP2003253332A
公开(公告)日：2003-09-10
申请号：JP2002054670
申请日：2002-02-28
Applicant: NAT INST FOR MATERIALS SCIENCE , JFE STEEL KK
Inventor： OMORI AKIO , TORITSUKA SHIRO , NAGAI HISASHI
Abstract: PROBLEM TO BE SOLVED: To provide a method for manufacturing a thick steel plate having a hyperfine grain structure, which has a strength enhanced by micronizing grain sizes to 1 μm or less, without adding any alloying element, and can contribute to the environment and the recyclability, and to provide the thick steel plate having the hyperfine grain structure in which the grains have micronized sizes of 1 μm or less, and are surrounded by large-angle grain boundaries. SOLUTION: The method for manufacturing the thick steel plate having the hyperfine grain structure is characterized by subjecting a steel material to multidirectional multi-pass warm rolling in a temperature range of 350-750°C, which makes at least two of accumulated reduction strains εT, εW, and εL, respectively in a thickness direction, a width direction, and a longitudinal direction of the plate, which are shown in equations (1)-(3), to be 0.3 or more, and makes the total accumulated reduction strain εT+εW+εL to be 1.8 or more, (where RT, i ,RW, i , and RL, i respectively indicate a rolling reduction of the i-th reduction pass (%) in the thickness direction, the width direction, and the longitudinal direction of the plate). COPYRIGHT: (C)2003,JPO
-
公开(公告)号：JP2003252622A
公开(公告)日：2003-09-10
申请号：JP2002055876
申请日：2002-03-01
Applicant: NAT INST FOR MATERIALS SCIENCE
Inventor： IKEGAMI TAKAYASU , RI TSUGUMITSU , MORI TOSHIYUKI
Abstract: PROBLEM TO BE SOLVED: To provide an acicular ceria powder with a nano-sized diameter suitable as a catalyst or catalyst carrier. SOLUTION: The production method for an acicular ceria particle having the diameter of 15 nm or less is characterized by mixing an aqueous solution of cerium salt having a concentration of 0.01 mol/l to its saturated one with an aqueous solution of ammonium carbonate of the concentration of 1-7.5 mol/l in such a way that the ratio of the cerium salt to ammonium carbonate is 5 or more, aging within a temperature range of from 50 to 85°C to synthesize ammonium cerium carbonate expressed by the formula, (NH 4 ) x Ce(OH) y (CO 3 ) z -tH 2 O (wherein, 0.10≤x COPYRIGHT: (C)2003,JPO
-
-
-
-
-
-
-
-
-
Search Results
773
records
(took 0.027 seconds)
