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  • 1
    Electronic Resource
    Electronic Resource
    Biodegradable Fiber Reinforced Ti Composite Fabricated by Spark Plasma Sintering Method (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 3201-3206 
    Details
    ISSN: 1662-9752
    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: Ti and Ti alloys are particularly attractive materials as the metallic implant-material. Thisis because that these alloys have low shear modulus and the good biological compatibility with bone.However, interfacial adhesion ability of bone and Ti alloy is low. As improvement method of theinterfacial adhesion ability, bioaffinity material like hydroxyapatite has been coated on surface of theTi alloys. However, such bioaffinity materials have low strength and wear resistance. In this study, Ticomposites containing biodegradable poly-L-lactic-acid (PLLA) fiber were fabricated by sparkplasma sintering (SPS) method. The PLLA fiber plays a role as reinforcement in Ti matrix, and canbe gradually decomposed inside body with progress of time. By the decomposition of PLLA, pore isgenerated in Ti matrix, and bone simultaneously penetrates into the pore. Therefore, tightly bondbetween bone and Ti matrix can be expected. Using the Ti-PLLA composites fabricated by SPSmethod, microstructural observation and mechanical tests were performed. It was found thatTi-PLLA composite has laminate-layer structure with plate-like shape PLLA. Hardness and wearbehavior of Ti-PLLA composite has anisotropy due to its structure. However, strength of theTi-PLLA composite is low because of the imperfect sintering of Ti matrix. Since sintering of Timatrix can be improved by changing the temperature of SPS, Ti-PLLA composite with anisotropicmechanical properties can be expected by SPS method
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.3201.pdf
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of SiO〈sub〉2〈/sub〉 Particles on Wear Behavior of Cu-SiO〈sub〉2〈/sub〉 Dispersion-Hardened Alloys (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 659-662 
    Details
    ISSN: 1662-9752
    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: Effects of solid particles on wear behavior of dispersion-hardened alloy were investigatedusing Cu-SiO2 alloys containing 0.6vol.%SiO2, 1.2vol.%SiO2 and 1.7vol.%SiO2 particles. Wear testswere made using pin-on-disc type wear machine. Wear property of the Cu-SiO2 alloys is improved byincreasing volume fraction of SiO2 particles. Moreover, wear amounts of Cu-SiO2 alloys increasewith increasing the sliding distance, and then are saturated at exceeding about 1km. This is why thatSiO2 particle improves the strength of Cu-SiO2 alloy, and that the work hardening occurs on wornsurface. Wear-induced layer is formed just below worn surface by severe plastic deformation due towear, and its hardness increases as the volume fraction of SiO2 particles increases. From theseobtained results, wear process of Cu-SiO2 alloy was discussed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.659.pdf
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  • 3
    Electronic Resource
    Electronic Resource
    Grain Refinement Performance of Aluminium Cast-Alloy by Deformed Al-Al〈sub〉3〈/sub〉Ti Alloy Refiner (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 519-521 (July 2006), p. 1859-1864 
    Details
    ISSN: 1662-9752
    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: Grain refining experiments for casting of pure Al were conducted to evaluate the grainrefinement performance of an Al-5mass%Ti alloy refiner before and after cold rolling. Al3Tiparticles in the Al-Ti alloy refiner were efficiently fragmented by cold rolling. The size of theAl3Ti particles in cold rolled Al-Ti alloy refiner decreased from 280μm to 30μm with increasingreduction ratio of cold rolling. Mean size of α-Al grains in pure Al cast refined by the cold rolledAl-Ti alloy refiner decreased from about 500μm to 200μm with increasing the reduction ratio. Inorder to investigate mechanical property of the pure Al cast refined by the cold rolled Al-Ti alloyrefiner, Vickers hardness test and tensile test were conducted. Strength of the pure Al cast refinedby the cold rolled Al-Ti alloy refiner increased with increasing the reduction ratio. The strengthimprovement of pure Al cast refined by the cold rolled Al-Ti alloy refiner followed Hall-Petchrelationship. From obtained results, it was concluded that cold rolling for refiner is usefulpractical application for pure Al cast
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.1859.pdf
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  • 4
    Electronic Resource
    Electronic Resource
    Mechanical Properties of Al-5.7wt% Ni Eutectic Alloy Severely Deformed by Equal-Channel Angular Pressing (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 539-543 (Mar. 2007), p. 2916-2921 
    Details
    ISSN: 1662-9752
    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 this study, an Al-5.7wt% Ni eutectic alloy was subjected to severe plasticdeformation (SPD) by an equal-channel angular pressing (ECAP) technique. ECAP technique wascarried out by using two strain introduction methods, route BC and route A, at a temperature. It isfound that the Al-Ni eutectic alloy specimens after ECAP technique by route BC and route Amethods have very different microstructures which affected strongly the tensile properties of thespecimens. Namely, after ECAP technique by route BC method, the fine Al3Ni dispersoids ofabout 300 nm homogeneously dispersed in α-aluminum matrix and the samples appeared no clearanisotropic in tensile properties, while the eutectic textures containing α-Al and Al3Ni fibrousdispersoids have highly anisotropy distribution and are proved to have significant anisotropy tensileproperties after ECAP technique by route A method. Results of Young’s modulus andsimultaneous internal friction measured by dynamic mechanical analysis (DMA) were alsopresented. Based on the experimental results, the fracture mechanism during tensile process of theAl-Ni eutectic alloy by different strain induction methods was discussed
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/15/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.539-543.2916.pdf
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of Processing Route on Microstructure and Texture Development in ECAP of Al-Ti Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 251-254 
    Details
    ISSN: 1662-9752
    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: Microstructure and texture evolution during equal channel angular pressing (ECAP) ofAl-5 mass%Ti alloy are investigated for up to 8 passes via routes A and BC. Platelet-shaped Al3Tiparticles in the Al-5mass%Ti alloy are cracked severely with repetitive ECAP passes, and the meansize of the Al3Ti particles is decreased with increasing the number of ECAP passes.Microstructural observation showed that an Al–Ti supersaturated solid solution is formed during theECAP process. It is also found that the Al-Ti alloy after ECAP by route A and route Bc methodshave very different microstructures. Namely, after ECAP by route Bc, the fine Al3Ti particles arehomogeneously dispersed in Al matrix, while the microstructure has highly anisotropic distributionafter ECAP by route A
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.251.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Mechanical and Physical Properties of Ni〈sub〉3〈/sub〉Al-Based Alloys with Cr Carbides Dispersion (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 439-442 
    Details
    ISSN: 1662-9752
    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: Ni3Al-based alloys possess good oxidation resistance, moderate room and hightemperature strength and ductility. Introduction of Cr-carbide particles through a solidification routeis attempted to provide higher hardness and wear resistance. The mechanical and physicalproperties are measured at room temperature for several alloys with various carbon concentrationsup to 2.0 wt.%. Hardness and wear resistance as well as compressive strength increase withincreasing carbon concentration, while bend ductility decreases. Adhesion between carbides andmatrix phase is good, and cracks propagate mainly through carbides. The crystallographicorientation relationships between constituent phases are also attempted using electronback-scattering diffraction (EBSD) technique. The thermal conductivity is found to be less sensitiveto the alloy composition
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/17/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.439.pdf
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  • 7
    Electronic Resource
    Electronic Resource
    Co Addition Effect on the Precipitation Behavior of Laves Phase in Fe-10Cr Ferritic Alloy (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 561-565 (Oct. 2007), p. 1745-1748 
    Details
    ISSN: 1662-9752
    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: Ferritic heat-resistant steel comprises basic alloys of Fe-10mass%Cr-W. This studyinvestigates how stress, the addition of Co, and tempering before aging affect the precipitation ofthe Laves phase of Fe-10Cr-6W ferritic heat-resistant steel, which is used in ultra-supercriticalpower plants and nuclear reactor materials. The study also investigates the mechanical properties ofthe steel. Precipitation of the Laves phase by aging increases the tensile strength, but decreases theelongation and impact strength of the alloys. Toughness of the alloys decreases greatly as very finedisk-like Laves phases appear in early aging stage. The strength and impact value of the steeldecrease when the steel is tempered before aging. This is mainly due to decrease of density andincrease of the particle size in the Laves phase. Since precipitation of the Laves phase increases byaddition of Co; the strength increases and the elongation and impact value decrease
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/18/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.561-565.1745.pdf
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  • 8
    Electronic Resource
    Electronic Resource
    Effects of Processing Routes on Wear Property of Al-Al〈sub〉3〈/sub〉Ti Alloys Severely Deformed by ECAP (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 584-586 (June 2008), p. 971-976 
    Details
    ISSN: 1662-9752
    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: Al-Ti alloys, which have Al3Ti platelet particles in Al matrix, were deformed by ECAPwith routes A and Bc. With increasing the number of ECAP passes, Al3Ti platelet particles arefragmented and their sizes decrease. The microstructure of ECAPed Al-Ti alloy specimens by routeA has a strong alignment of the fragmented Al3Ti particles. On the other hand, ECAPed Al-Ti alloyspecimens by route Bc have a relatively homogeneous distribution of Al3Ti particles comparing withthe specimen deformed by route A. Based on these results, it was found that ECAPed Al-Ti alloyspecimen by route A has highly anisotropic microstructure. However, both ECAPed specimens withroutes A and Bc have no anisotropic wear property. That is because the wear property of the Al-Tialloy specimen depends on the shape of the Al3Ti particle. From these results, it was found that SPDinduced by ECAP is an effective processing method to make homogeneous wear property for themetallic material containing platelet solid-particles
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.584-586.971.pdf
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  • 9
    Electronic Resource
    Electronic Resource
    Stoichiometry control of atomic beam fluxes by precipitated impurity phase detection in growth of (Pr,Ce)2CuO4 and (La,Sr)2CuO4 films (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 2557-2559 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This letter describes a method to sense slight off-stoichiometry (less than 2%–3%) in the cation ratio [Cu/(Pr+Ce) or Cu/(La+Sr)] of atomic beam fluxes by detecting precipitated impurity phases on the surface using reflection high-energy electron diffraction during growth of T′-(Pr,Ce)2CuO4 and T-(La,Sr)2CuO4 films. The method is based on the facts that off-stoichiometry of fluxes inevitably produces precipitates of certain impurity phases on the surface in film growth of these oxides, and that the species of the impurity phases are solely determined by the type of off-stoichiometry; copper rich or lanthanoid rich. Furthermore, it has been found that it is possible to recover a precipitate-free surface, from a surface with precipitates produced by lanthanoid-rich deposition, by later flux readjustment, but it is difficult from a surface with precipitates produced by copper-rich deposition. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.114431
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  • 10
    Electronic Resource
    Electronic Resource
    The Distribution of Disintegrated Droplets (1977)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 16 (1977), S. 475-480 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i160064a015
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