Showing papers on "Bimetal published in 2009"
01 Jan 2009
TL;DR: Investigation of molecular interactions involved in the selective binding of several short peptides derived from phage-display techniques to surfaces of Au, Pd, and Pd-Au bimetal suggests a "soft epitaxy" mechanism of binding.
301 citations
TL;DR: In this paper, three types of interfaces occur during the solidification of bimetal: liquid-liquid steel interaction (Interface I), interaction of solid structural steel and liquid stainless steel interaction, and interaction of liquid-solid steel and solid-solid interaction.
68 citations
TL;DR: Arsenic sorption reaction with nanostructured hydrous iron(III)−zirconium(IV) bimetal mixed oxide (NHIZO) was investigated experimentally with varying parameters, viz., the effects of pH, contac....
Abstract: Arsenic(V) sorption reaction with nanostructured hydrous iron(III)−zirconium(IV) bimetal mixed oxide (NHIZO) was investigated experimentally with varying parameters, viz., the effects of pH, contac...
67 citations
TL;DR: Nanosize-controllable Cu, Ag, Pd, Ni, CuPd alloy and Cu-Ag bimetal encapsulated in inert carbon shells can be synthesized by carbonization of metal-cyclodextrin complexes with a remarkable capability of experimentally determining the size-dependent melting temperature depression of many metal or alloy nanoparticles.
45 citations
TL;DR: In this paper, the authors employed poly acrylic acid (PAA) for the synthesis of stable bimetal nanoparticles (SBN) by selecting appropriate PAA molecular weight and dosage to reduce particle aggregation.
35 citations
Patent•
16 Sep 2009
TL;DR: In this paper, a method for preparing a bimetal composite plate by stirring friction braze welding is presented, in which a plate with small hardness is used as a covering layer metal plate, a plate of high hardness is employed as a base-layer metal plate and a non-needle type cylindrical friction device is made to rotate and be pressed to be closely contacted with the surface layer of the covering layer.
Abstract: The invention discloses a method for preparing a bimetal composite plate by stirring friction braze welding. The method comprises that: a plate with small hardness is used as a covering layer metal plate; a plate with high hardness is used as a base layer metal plate; the covering layer metal plate and the base layer metal plate are horizontally fixed on a working platform surface in a lap joint mode; solders which can generate eutectic reaction with one of the upper/base layer metal plates are preset between the upper/base layer metal plates; a non-needle type cylinder friction device is arranged over the covering layer metal plate; the non-needle type cylindrical friction device is made to rotate and be pressed to be closely contacted with the surface layer of the covering layer metal plate, but not penetrate the covering layer metal plate, and the non-needle type cylindrical friction device rotates in the original position or moves forward along the surface of the covering layer metal plate while rotating; by utilizing frictional heat to melt the solders, the upper/base layer metal plates are both quickly melted in the solders, thereby achieving excellent interface combination; and the excessive solders are squeezed out, and a thin and dense soldering seam is formed, so that the bimetal composite plate is prepared. Compared with the braze welding in a furnace, the method has the advantages of high efficiency, energy conservation, pressure lead-in, unnecessary soldering flux and gas protection and short holding time at a high temperature.
34 citations
TL;DR: In this article, the effect of presence of mm-scale AA5052 core on the compressive properties of the bimetal macrocomposite is investigated, and the results showed that the presence of the core increased compressive yield strength (0.2% CYS) (+51%), ultimate compressive strength (UCS) (+4%), average failure strain (+18%) and work of fracture (WOF) (+50%) of AZ31.
24 citations
TL;DR: In this article, bimetal oxides were synthesized and studied as anodes for intermediate temperature solid oxide fuel cells (SOFCs) based on yttria-stabilized zirconia (YSZ) film electrolyte.
21 citations
TL;DR: In this paper, a comparison of different catalyst systems (FeMo, CoMo or NiMo nanoparticles supported on calcium carbonate) has been performed in order to optimize the carbon nanotube (CNT) growth.
Abstract: A comparison of different catalyst systems (Fe–Mo, Co–Mo or Ni–Mo nanoparticles supported on calcium carbonate) has been performed in order to optimize the carbon nanotube (CNT) growth. The influences of the reaction temperature, metal loading and carbon source on the synthesis of CNTs were investigated. Dense CNT networks have been synthesized by thermal chemical vapor deposition (CVD) of acetylene at 720 °C using the Co–Mo/CaCO3 catalyst. The dependence of the CNT growth on the most important parameters was discussed exemplarily on the Co catalyst system. Based on the experimental observations, a phenomenological growth model for CVD synthesis of CNTs was proposed. The synergy effect of Mo and active metals was also discussed.
21 citations
TL;DR: In this article, the authors studied the formation of Sn whiskers in a "bimetal ledge specimen" that consisted of a uniform layer of Sn that was covered by Cu on only half the sample.
Abstract: Sn whisker formation was studied in a “bimetal ledge specimen” that consisted of a uniform layer of Sn that was covered by Cu on only half the sample. Whiskers are observed to grow in the Cu-free region of the sample, which is attributed to stress generated by the diffusion of Sn atoms along the network of columnar grain boundaries. The Sn diffusion is driven by the intermetallic growth, but the whisker density extends out much further than any measurable Cu concentration. Whiskers were also observed to grow in the Cu-coated region by punching through the overlayer, leaving a Cu-grain on the tip of the Sn whisker.
21 citations
TL;DR: It is demonstrated that self-oscillated resonant frequency of the bimetal oscillator changes in response to heat from a microheat source and potential abilities of the mechanical resonant thermal sensor are shown.
Abstract: Thermal detection based on the thermal shift of the resonant frequency of a bimetal resonator (Al/Si) is presented and demonstrated. The bimetal oscillator with a tip is fabricated at the end of a commercial silicon cantilever. The bimetal oscillator and the silicon cantilever have a resonance frequency of 441 and 91 kHz, respectively, and the measured temperature coefficients of the resonant frequency are -127x10(-6)/K and -115x10(-6)/K, respectively. It is demonstrated that self-oscillated resonant frequency of the bimetal oscillator changes in response to heat from a microheat source. Simultaneous measurements of topography and temperature profile with the temperature resolution of 0.12 K on a glass substrate heated using a thin chromium film microheater are successfully demonstrated. These results show potential abilities of the mechanical resonant thermal sensor.
TL;DR: In this article, a fiber Bragg grating temperature sensor with controllable sensitivity and variable measurement range was demonstrated using bimetal configuration, achieving sensitivities of -51.2, -86.4, and -520 pm/K.
Abstract: At cryogenic temperature, a fiber Bragg grating (FBG) temperature sensor with controllable sensitivity and variable measurement range is demonstrated by using bimetal configuration. In experiments, sensitivities of -51.2, -86.4, and -520 pm/K are achieved by varying the lengths of the metals. Measurement ranges of 293-290.5, 283-280.5, and 259-256.5 K are achieved by shortening the distance of the gap among the metals.
Patent•
11 Feb 2009
TL;DR: In this paper, a method for girth welding for double-phase stainless steel bimetal composite tubes was proposed, and the welding surface of the base tube was processed into a V-shaped groove at an angle of 45-55 degree.
Abstract: The invention discloses a method for girth welding for double-phase stainless steel bimetal composite tubes The method comprises the following steps of: firstly, groove processing: the double-phase stainless steel bimetal composite tube consists of a double-phase stainless steel lining tube and a carbon steel base tube, the welding surface of the base tube is processed into a V-shaped groove at an angle of 45-55 degree, and the lining tube is 2-3 mm longer than the base tube; secondly, caulk welding: the connection ports between the base tube and the lining tube are welded through argon tungsten-arc welding, double-phase stainless steel welding wires are adopted, and the welding current is 65-80 A; thirdly, backing welding: the connection ports of lining tube are welded through argon tungsten-arc welding, double-phase stainless steel welding wires are adopted, and the welding current is 60-90 A; fourthly, base tube welding: the connection ports of the base tube are welded through arc welding, and double-phase stainless steel welding wires are adopted The procedures and the steps are simple, the used welding material is in a small amount, the welding qualification rate is high, the welding defect can be reduced or avoided, and the production efficiency can be greatly improved
Patent•
05 Feb 2009
TL;DR: A thermally actuated valve includes a valve body having an orifice, a bimetal disc, a first spring element located on one side of the Bimetal Disc, and a second spring element positioned on the opposite side of Disc as discussed by the authors.
Abstract: A thermally actuated valve includes a valve body having an orifice, a bimetal disc, a first spring element located on one side of the bimetal disc, and a second spring element located on the opposite side of the bimetal disc. The bimetal disc is movable between a first position and a second position. The bimetal disc closes the orifice when in the first position and opens the orifice when in the second position. At least one of the first spring element and the second spring element is made from a shape memory alloy.
TL;DR: In this paper, two bimetals composed of a Co-based alloy and AISI 4140 steel were fabricated by induction fusing at 1200°C and 1250°C, respectively.
TL;DR: In this article, the conditions of periodic silica sphere array formation along the template valleys are sufficiently large grating modulation depth, appropriate ratio of silica spheres diameter to grating period, and optimized speed of spinning.
Patent•
02 Dec 2009
TL;DR: In this article, a bimetal wear resistance composite tube was proposed, which comprises a carbon steel layer in an outer layer and a wear resistant high-chromium cast iron layer in the inner layer.
Abstract: The invention provides a bimetal wear resistance composite tube, which comprises a carbon steel layer in an outer layer and a wear resistant high-chromium cast iron layer in an inner layer; the carbon steel layer is made of one of three materials of ZG15, ZG25 and ZG35; and the wear resistant layer is made of one of three materials of KMTBCr26G, KMTBCr20MoG and KMTBCr15MoG. The composite tube is one of a straight tube, an elbow tube, a tee tube, a four-way tube and a special tube. The composite tube has the advantages of jointly utilizing the characteristics of the carbon steel and the high-chromium cast iron, solving the problems of wear resistance and toughness, having low cost, and also solving the unsolvable contradiction of weldability and wear resistance existing in the composite tube adopting the single material, along with long service life and convenient transportation, assembly and use.
TL;DR: In this article, the microstructure of the Co-based alloy was examined and the influence of on the alloy of acid solutions, the temperature of these solutions, and the immersion time was investigated.
TL;DR: In this paper, the effect of the bimetal and polymer-coated bimetals on the surface plasmon resonance is investigated in a modified Kretschmann arrangement allowing polar and azimuthal angle scans.
Patent•
08 Jul 2009
TL;DR: In this article, an environment-friendly copper base-steel bimetal shaft bushing material and a manufacturing method for the manufacturing of a metal plate was proposed. But the material and the method have the advantages that because the bismuth is used for replacing lead in the copper base alloy, the material does not contain the lead, has no harm to human body or pollution to environment.
Abstract: The invention relates to manufacture of a metal plate, in particular to an environment-friendly copper base-steel bimetal shaft bushing material and a manufacturing method thereof. The invention adopts a technical proposal that the material consists of a steel plate and a copper base alloy abrasion-resistant layer, wherein the copper base alloy abrasion-resistant layer comprises the following components in percentage by weight: 1 to 15 percent of bismuth, 0.5 to 10 percent of tin, 0.3 to 15 percent of zinc, and the balance being copper; and the copper base alloy abrasion-resistant layer is directly sintered or poured on the steel plate. The material and the method have the advantages that because the bismuth is used for replacing lead in the copper base alloy, the material does not contain the lead, has no harm to human body or pollution to environment, and is the environment-friendly copper base-steel bimetal shaft bushing material.
Patent•
07 Jan 2009
TL;DR: In this article, a slowly-released water reducer for concrete is proposed, which consists of bimetal hydrate, and a cement concrete used water reducing agent dispersed in the stratiform hydrate.
Abstract: The invention provides a cement concrete slowly-released water reducer. The cement concrete slow-released water reducer is characterized in that the water reducer consists of bimetal hydrate, and a cement concrete used water reducer dispersed in the stratiform bimetal hydrate; the stratiform bimetal hydrate is stratiform MgAl bimetal hydrate or stratiform CaAl bimetal hydrate; the water reducer is a water reducer of naphthalene series or a water reducer of poly carboxylic acid series; the preparation method of the slowly-released water reducer comprises the steps of preparing the stratiform bimetal hydrate, preparing a bimetal oxide and preparing the slowly-released water reducer and so on. In the invention, the roasted product of the stratiform bimetal hydrate, namely, the bimetal oxide, is added to the solution containing the water reducer which enters the layers during the reconstruction of the stratiform structure, thus preparing the powdered water reducer. When the water reducer having the slow release performance is added to and mixed in the concrete at one time, the water reducer is released slowly, thus effectively reducing the loss of the slump constant of concrete; the transportation cost of the powdered slowly-released water reducer can be significantly reduced.
Patent•
22 Jul 2009
TL;DR: In this article, a bimetal valve consisting of a partial valve blank containing a shaft part, made of a first alloy, and a composite part that forms the valve plate was presented.
Abstract: The invention relates to a bimetal valve comprising a partial valve blank containing a shaft part (16), made of a first alloy, and a composite part that forms the valve plate (17) and is made of a second alloy of high quality,. Said bimetal valve is produced by binding the partial valve blank to the composite part in order to form a composite valve blank and then forging the composite valve blank to form a bimetal valve blank (15).
Patent•
30 Apr 2009
TL;DR: In this paper, a recoverable polymer-supported bimetal cluster catalyst which allows alcohol to be oxidized while dispensing with a base such as potassium carbonate (K 2 CO 3 ) was proposed.
Abstract: PROBLEM TO BE SOLVED: To provide a recoverable polymer-supported bimetal cluster catalyst which allows alcohol to be oxidized while dispensing with a base such as potassium carbonate (K 2 CO 3 ) indispensable when the conventional gold cluster catalyst is used and to provide a method for producing a carbonyl compound by oxidizing alcohol while using the polymer-supported bimetal cluster catalyst. SOLUTION: The polymer-supported bimetal cluster catalyst, in which gold and a transition metal are deposited on a cross-linked polystyrene derivative, exhibits high activity and selectivity in an oxygen oxidation reaction of alcohol without using the base at room temperature and under normal pressure. COPYRIGHT: (C)2009,JPO&INPIT
Patent•
14 Jan 2009
TL;DR: In this article, a bimetal wire rod continuous online annealing technology and a special device are presented for wire drawing, online annaling and insulation plastic extruding.
Abstract: The invention relates to a bimetal wire rod continuous online annealing technology and the special device, which belongs to the technology of a bimetal wire rod continuous online annealing technology Bimetallic wire is drawn to the required diameter of the wire through a wire drawing machine; the bimetallic wire directly enters a continuous online annealing device to ensure the material to be softened and to achieve the requirement of elongation percentage; the bimetallic wire directly enters the machine head of a plastic extruding machine to perform the plastic insulation layer processing and the water tank cooling and is drawn and taken up to a plastic process disc; the three working procedures, namely the wire drawing, the online annealing and the insulation plastic extruding are connected in series, to complete the production of the copper cladding aluminum insulation core wire; the continuous online annealing device is formed through the arrangement of a central roller, a transitional guide roller, an upper track annealing roller, a heating pipe and a lower track annealing roller at intervals The bimetal wire rod continuous online annealing technology and the special device utilize the calorification generated by the short circuit of the resistance of the wire body and the heat quantity induction and transmission to the wire through the calorification of the heating pipe to combine the two heat quantities to perform annealing on the wire
20 Mar 2009
TL;DR: In this article, the authors have successfully fabricated hybridized nanoparticles composed of polydiacetylene nanocrystal (core) and Ag or Pt nanoparticle (shell) by means of visible-light-driven photocatalytic reduction.
Abstract: We have successfully fabricated hybridized nanoparticles composed of polydiacetylene nanocrystal (core) and Ag or Pt nanoparticle (shell) by means of visible-light-driven photocatalytic reduction. Difference in the reduction mechanism between Ag and Pt affected the size of deposited metal-nanoparticles. Next, the Agnanoparticles preformed on the polydicetylene nanocrystals were employed as both a catalyst and a substrate for an electroless plating. As a result, we succeeded in the fabrication of thicker Ptshell and bimetal shell (Ag-Au, Ag-Pt, Ag-Pd). The core-shell-type nanoparticles were characterized using SEM, TEM, powder-XRD, EPMA and UV-Vis-NIR extinction spectroscopy.
TL;DR: In this article, the fracture toughness of small grain Nb metals decreased with decreasing test temperature and reached the lower shelf values (30-40MPa√m) at or above 173-K.
Patent•
11 Nov 2009
Abstract: The utility model relates to a steel-based composite copper alloy bimetal bearing liner and bearing sleeve, and belongs to the field of the lifting, loading and excavating machinery and the automobile mold parts. The steel-based composite copper alloy bimetal bearing liner and bearing sleeve comprises a steel-based bearing liner and bearing sleeve body. In the key technical proposal, the working surface of the steel-based bearing liner and bearing sleeve body is compounded with a copper alloy layer as a whole under the conditions with high temperature and high pressure through a permeable layer with a metal molecular chain. With the improvement based on the prior art, the utility model has the advantages of low price and easy processing, since the steel-based bearing liner and bearing sleeve bodies made of different materials can be compounded with the copper alloy layer as a whole through the permeable layer with the metal molecular chain. Therefore, the utility model not only can ensure technical indicators of the steel-based bearing liner and bearing sleeve body, such as the strength of the but also can greatly reduce the manufacturing cost of the steel-based bearing liner and bearing sleeve body.
Patent•
14 Oct 2009
TL;DR: In this article, the authors proposed an alarm non-tripping device which is applied to a lowvoltage circuit breaker, which consists of a heat element, a bimetal sheet and a screw.
Abstract: The utility model relates to an alarm non-tripping device which is applied to a low-voltage circuit breaker. The device comprises a heat element, a bimetal sheet and a screw. The heat element is Omega-shaped, the bimetal sheet is adhered at the right side surface of a right half vertical part of the heat element, the lower part of the bimetal sheet is riveted at the lower part of the right half vertical part of the heat element by a rivet, the screw is transversely inserted at the upper part of the bimetal sheet in a penetrating manner, and the front end of the screw is stretched out of the bimetal sheet. The heat element can emit heat under the circumstance of long-term electrification, and can be acted on the bimetal sheet by the function of heat transfer. When the action temperature of the bimetal sheet is reached, the bimetal sheet can be bent, and a micro switch is touched, so as to realize the function of non-tripping alarm. The alarm non-tripping device has the advantages that: 1. the price is low; 2. the structure is simple and novel; 3. the installation is convenient, and the circuit breakers with various specifications are used; 4. the performance is safe and reliable.
Patent•
26 Aug 2009
TL;DR: In this paper, the authors proposed a bimetal compound pipeline with high pressure resistance and high corrosion resistance, which adopts double technology of a diameter shrinking method and software elasticity innerexpanding technology and is compactly compounded with zero clearance.
Abstract: The invention relates to a novel bimetal compound pipeline with high pressure resistance and high corrosion resistance. The outer layer consists of a seamless steel pipe or an alloy steel pipe and the like, and the inner layer consists of a stainless steel pipe or corrosion-resistant alloy materials, such as copper, titanium or nickel and the like. The pipeline adopts the processing technology of double technology of a diameter shrinking method and software elasticity inner-expanding technology and is compactly compounded with zero clearance. The pipeline solves the problem that the linear expansion of the bimetal at a high temperature is poor, improves the corrosion resistance of the pipeline and prolongs the service life of the pipeline on the basis of ensuring all the performances of the prior base pipes, and has low cost. The pipeline better solves the problem that a medium in crude oil and crude gas influences the corrosion index of the transferring pipelines and obtains good use effect during use.
Patent•
13 Mar 2009
TL;DR: In this paper, an overcurrent tripping device of a circuit breaker is provided to prevent a delay in tripping action to improve current-breaking performance, where a heater 9c disposed on a current path and a trip bar 24 of a switching mechanism 15, a bimetal 26 is disposed with its base end fixed to the heater and its front end extended toward the trip bar.
Abstract: PROBLEM TO BE SOLVED: To provide an overcurrent tripping device of a circuit breaker which prevents a delay in overcurrent tripping action to improve current-breaking performance. SOLUTION: Between a heater 9c disposed on a current path and a trip bar 24 of a switching mechanism 15, a bimetal 26 is disposed with its base end fixed to the heater and its front end extended toward the trip bar, and a runoff tab 27 is fixed to the tip of the bimetal with a free end thereof located near the trip bar. A flow of overcurrent through the current path causes the heater to generate heat so that the tip of the bimetal is heated and bent. This bending of the bimetal tip results in a shift in the position of the free end of the runoff tab, which eventually comes in contact with the trip bar. COPYRIGHT: (C)2010,JPO&INPIT