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  • 1
    Electronic Resource
    Electronic Resource
    Microstructure and Properties of Brush Electroplated Nano-SiC-Al〈sub〉2〈/sub〉O〈sub〉3〈/sub〉/Ni Composite Coating (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 285-288 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: This paper investigated the effect of nano-SiC particle on microstructure andproperties of brush electroplated nano-Al2O3/Ni composite coating. Three kinds of coatings,such as pure nickel coating, nano-Al2O3/Ni composite coating and nano-SiC-Al2O3/Nicomposite coating, were fabricated on 1045 steel substrate. Before deposited, Zeta potential ofnano-particles in the solution was examined. The results show Zeta potential of thenanoparticles in the nano-Al2O3/Ni electrolyte is negative, but that of the nanoparticles innano-SiC-Al2O3/Ni electrolyte is positive when the pH value of electrolyte is about 7.5. Energydispersive spectroscopy (EDS) results show Al element content in the nano-Al2O3/Ni coating is5.65%, while the content of Al and Si elements in nano-SiC-Al2O3/Ni coating is 5.63% and4.86% respectively. It confirms that nano-SiC particle co-deposited in the composite coatingwhile nano-Al2O3 particle content keeps constant. The microhardness of nano-SiC-Al2O3/Nicoating exhibits the highest, while the pure nickel coating is the lowest. And surfacemorphology of nano-SiC-Al2O3/Ni coating is the most smooth and compact among the threecoatings. The wear test results reveal that wear resistance of nano-SiC-Al2O3/Ni coating is 1.7times of that of nano-Al2O3/Ni coating, and 2.3 times of that of pure nickel coating. The aboveresults show the nano-SiC particle services a strengthening effect on the combinationperformance of nano-SiC-Al2O3/Ni coating
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.285.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Preparation and Tribological Properties of Surface-Coated Nano-Copper Additives (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 580-584 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In the present work, surface-coated Cu nanoparticles with FCC structure and an averagesize of 40 nm were prepared by reducing reaction and surface modification technique. Themorphology and phase structure of the nano-copper were characterized by transmission electronmicroscope (TEM). The ball-on-disc tester and ring-on-block tester were performed to study thetribological properties of surface-coated Cu nanoparticles as oil additive. The tests were carried outunder the lubrication of 50CC oil alone and oil containing surface-coated nano-copper additives. Themorphologies and elementary distributions of the worn surfaces were analyzed by scanning electronmicroscope (SEM) and energy dispersive spectrometry (EDS), respectively. Results indicate thatsurface-coated nano-copper additives can significantly improve the wear resistance and load-carryingabilities of 50CC oil, as well as reduce friction coefficient. A soft copper protective film is formed onthe worn surface lubricated with oil containing nano-copper additives, which separates the wornsurfaces, avoids their direct contact and reduces friction and adhesive wear. Besides, the grooves andsmall valleys on the worn surfaces are found to be partly filled and repaired by nano-copper, as makesthe worn surface repaired and smoother
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.580.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Microstructure and Tribological Properties of Layer Deposited by Micro-Plasma Arc Welding on Worn Gear (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 338-341 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Surface of gear that works continuously tends to be wore. Hardfacing on worn gear canrepair its worn surface, restore its precision, consolidate its surface property, and save cost.Micro-Plasma Arc Welding (micro-PAW) has low heat input and narrow heat-affected zone, and ithas good properties of energy concentration and high energy density. Therefore, hardfacing bymicro-PAW is an effective method to repair worn gear surface. KF-Ni60A Ni-based alloy powder hasgood weldability property, and KF-Ni60A welding layer has low friction coefficient and goodproperty of wear resistance between metallic hard surface, so it is a kind of good overlaying materialthat can be applied to the welding process to repair the worn gear surface. In this research, the methodof overlaying on worn gear using KF-Ni60A Ni-based alloy powder by micro-PAW is studied. Themicrostructure of deposition layer and the elementary distribution of cross-section are analyzed, thesurface hardness and wear resistant property of the layer are measured. The result indicates that thedeposition layer and the base metal bond well, the layer has high adhesive strength and hardness, lowporosity, and good property of wear resistance
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.338.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    An Automatic High Velocity Arc Spraying System (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 89-92 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: A new automatic high velocity arc spraying system was developed. The system wasconsisted of five units, i.e. central control unit, operating machine, positioner, touching screen andhigh velocity arc spraying equipment. The central control unit is controlled by a program, controllingother four units. Spraying parameters could be input and modified on the touching screen duringspraying. The moving of spraying gun was carried out by motion arm of the operating machine. Therotational velocity and angle of components to be sprayed was controlled by positioner. The sprayingprocess for a cylinder body of automobile engine with the system was introduced in detail. The autoand manual arc spraying have been used to fabricate coating. The microstructure of the coatingsprepared by the two spraying processing was analyzed. The result shows that the auto sprayed coatinghas a more uniform and compact structure than that of the manual sprayed coating
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.89.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Application of EIS and SEM to Study the Corrosion Behaviors of Organic Coatings/Substrate System (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 556-559 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Electrochemical corrosion behaviors of two common-used ship coatings——epoxyaluminum coating, chloride rubber iron red coating and their composite coatings immersed in3.5%NaCl solution were investigated using electrochemical impedance spectroscopy combined withopen circuit potential measurements and SEM micrograph analysis. Potential-time result indicatesthat the free corrosion potential of these three coatings with immersion time are more positive thanthat of metal substrate, which can serve as barrier layer to protect metal substrate from corrosion.During the course of immersion, increasingly negative shift potentials with time reveal the growth ofelectrochemical area of anode and corrosion takes place continuously. EIS shows that corrosivespecies can penetrate into coatings and reach the coating/substrate interface promptly, causing thedecrease of its shielding role and the beginning of electrochemical corrosion. SEM micrographssuggest that coatings were compact and continuous compared with obviously coarse and loose aftercorrosion, indicating the penetration of corrosive species destroys cross linkage of coatings.Composite coatings present better protection performance, displaying the effect of “1+1〉2”remarkably
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.556.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    The Remanufacturing Engineering and Automatic Surface Engineering Technology (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 1-10 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Entering into the 21st century, remanufacturing engineering has been developedrapidly in China, Especially from 2005, lots of remanufacturing laws and regulations have beenreleased. Remanufacturing engineering is the industrialization of high technology maintenanceto the waste productions, and the advanced period of the maintenance engineering and surfaceengineering. The basic character of surface engineering is synthesis, intercross, compounding,and optimization. Surface engineering takes the “surface” as core. Nano surface engineering isthe integration and creation between the nano materials and traditional surface engineering. Toadapt the demand of remanufacturing industrialization, five kinds of automatic andintelligentized technologies, namely automatic nano electro-brush plating technology,automatic high velocity arc spraying technology, semi-automatic micro plasma arc weldingtechnology, automatic laser cladding technology, and intelligentized self-repair technology,have been independently innovated
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.1.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Structure and Wear Resistance at Elevated Temperature of Auto Brush-Plating n-Al〈sub〉2〈/sub〉O〈sub〉3〈/sub〉/Ni Composite Coatings (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 523-526 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Nanoparticle reinforced nickel matrix composite coating, n-Al2O3/Ni, was prepared bymanual brush-plating and auto brush-plating technologies. For the auto-coating, the surface wassmooth and made up of large quantity spheroid grain. The observed auto-coating’s structure wasdense. Compared with the auto-coating, the manual-coating’s surface was coarser, the grains thatform the surface were not spheroid but anomalistic and similar to cauliflower. The structure ofmanual-coating was sparser than the auto-coating’s. And the test found that the auto-coating’smicro-hardness improves 8% than the manual-coating’s. Results of the friction wear testing atelevated temperature showed that the wear resistance of auto-coating decreases while the temperaturegoes higher. It was concluded that during the process of auto-coating, with the help of computer, thespeed, pressure and flow brush liquid was stable. While during the manual process the parameterswere not controlled so that the quality of the coating was influenced. The other advantage of theauto-coating was set worker free from the front line, decrease harm to worker, provide comfortableworking condition, and keep the coating’s quality on a high level, can be adapted to large-scalepopularization and application
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.523.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Tribological Behavior of Nano-Silicate Mineral Powder as Lubrication Oil Additive (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 488-492 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The tribological behavior and the mechanism of nano-silicate mineral powder aslubrication oil additive were researched in the article. The tribological behavior of nano-silicatemineral powder with mass ratio 0.6% in lubrication oil 50CC was tested and compared with thelubrication oil 50CC’s by friction wear testing machine. The surface morphologies and elementarycompositions of grinding cracks were analyzed by Scanning Electron Microscope (SEM) and EnergyDispersive Spectrometer (EDS).The results showed that the friction coefficient is decreased 37.5%,and the lost mass of the upper proof sample reduces 68.75%, the down’s reduces 86.7%, after addingnano-silicate mineral as lubrication oil additive, by comparison to lubrication oil 50CC’s. Under thelubrication oil which has been putted nano-silicate mineral as additive, there is a repairing layerwhose material is different from basal body material on the grinding cracks; in addition, Si, Mg andother elements are deposited on the repairing layer. These state that nano-silicate mineral aslubrication oil additive possesses superior behavior of wear resistance, antiwear and self-repairingeffects
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.488.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Plasma Transferred Arc Powder Surfacing Technology of Thrust Face (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 43-46 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The thrust surface of W615 engine is remanufactured by plasma transferred arc (PTA)powder surfacing technology. The Ni15 Nickle-based alloy powder is selected as deposited metal. Byoptimizing the welding procedure, the coating is free of crack and pore. The microstructurecharacteristics of deposition layer are investigated by metallographic microscope, and themicrohardness of the overlay is measured by vickers hardness tester. It is found that the heat affectedzone is narrow, the rate of dilution is low and the microhardness of deposition layer is about HV130which is close to that of base metal. Furthermore, the hardness of welding surface can meet the needsof the engine
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.43.pdf
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  • 10
    Electronic Resource
    Electronic Resource
    Corrosion Protection of A3 Steel with Zn-Al-Mg-RE Coating from Arc Spraying (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 373-374 (Mar. 2008), p. 64-68 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Cored wires and high velocity arc spraying (HVAS) technologies have been applied toproduce Zn-Al-Mg-RE coating on A3 steels. The durability of coating in terms of corrosionresistance is the focus of this paper. The detailed degradation mechanism has been investigated usingelectrochemical-monitoring techniques supported by precise pre-test and post-test microscopicalexamination using Scanning Electron Microscopy (SEM) and X-Ray Diffraction (XRD).Zn-Al-Mg-RE coating shows a typical aspect of layered heterogeneous structure, the existing ofZnAl2O4 and MgAl2O4 implies the good anti-corrosion feature. The polarization curves showed thatZn-Al-Mg-RE coating exhibits passive behavior at 0.5h and 16h immersion, but at 600h, it begins todissolute. In contrast, the anti-corrosion performance isn’t cut down. The corrosion potential movesto the noble direction step by step, along with the current density drops gradually. After corrosion, ithas been observed that the coating surface is jointed by flaky lamellar products and dense withoutobvious defects and pores. It is postulated that with the addition of RE, the porosity of the coating isreduced, meanwhile, the stability of the products layer can reinforce the self-sealing effect of thecoating distinctively
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.373-374.64.pdf
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