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  • 1
    Electronic Resource
    Electronic Resource
    A high-strain-rate superplastic ceramic (2001)
    [s.l.] : Macmillian Magazines Ltd.
    Nature 413 (2001), S. 288-291 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] High-strain-rate superplasticity describes the ability of a material to sustain large plastic deformation in tension at high strain rates of the order of 10-2 to 10-1 s-1 and is of great technological interest for the shape-forming of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/35095025
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  • 2
    Electronic Resource
    Electronic Resource
    Adsorption of hydrogen on Ni and NiTiO"2 composite ultrafine particles
    Amsterdam : Elsevier
    Surface Science Letters 287-288 (1993), S. A438 
    Details
    ISSN: 0167-2584
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0167-2584(93)90595-A
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  • 3
    Electronic Resource
    Electronic Resource
    Adsorption of hydrogen on Ni and NiTiO"2 composite ultrafine particles
    Amsterdam : Elsevier
    Surface Science 287-288 (1993), S. 1082-1086 
    Details
    ISSN: 0039-6028
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0039-6028(93)91131-8
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  • 4
    Electronic Resource
    Electronic Resource
    Lattice defect and oxygen self-diffusion in MgO-stabilized ZrO2 (1985)
    Springer
    Journal of materials science 4 (1985), S. 176-180 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00728069
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of Silica Doping on the Electrical Conductivity of 3 mol % Yttria-Stabilized Tetragonal Zirconia Prepared by Colloidal Processing (1999)
    Springer
    Journal of electroceramics 4 (1999), S. 113-120 
    Details
    ISSN: 1573-8663
    Keywords: tetragonal zirconia ; yttria ; silica ; electrical conductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Silica-doped (SiO2 = 0 - 1.0 wt%) 3Y-TZP (3 mol % yttria-doped tetragonal zirconia polycrystal) ceramics are prepared from hetero-coagulated aqueous suspension by colloidal processing. Consolidation of the suspension was carried out by pressure filtration at 10 MPa followed by cold isostatic pressing (CIP) at 400 MPa. Consolidated compacts are densified to a relative density over 99% by sintering at 1573 K for 2 h. The formation of glass pockets at grain boundary multiple junctions was observed by SEM for ≥0.5 wt % silica-doped samples. Electrical conductivity measurements were performed to evaluate the modification of grain-boundaries by silica. The apparent grain boundary conductivity decreased with an increase in silica content and became nearly constant above 0.3 wt % of silica, while the bulk conductivity was constant with silica content.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009919011491
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  • 6
    Electronic Resource
    Electronic Resource
    Rapid quenching and properties of hard magnetic materials in MnAl-X (X=Ti, Cu, Ni, C, B) systems (1989)
    Springer
    Journal of materials science 24 (1989), S. 4331-4338 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract MnAl-X (X=Ti, Cu, Ni, C, B) ribbons were fabricated by a rapid quenching from the melt using a single roller method. As-rapid quenched ribbons were quenched completely into high temperature h c p phase. The rapid quenched ribbons were brittle especially carbon doped ribbons, however, the titanium doped ribbons were relatively ductile. Hard magnetic properties were measured using a vibrating sample magnetometer for the ten kinds of ribbons annealed at 410–700° C for 10 min–100 h. Phase transformation characteristics and magnetic properties were discussed by comparison with the samples produced by the conventional method. Titanium, boron and carbon doped ribbons showed good hard magnetic properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00544507
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  • 7
    Electronic Resource
    Electronic Resource
    Sintering characteristics of Fe and FeCo alloy ultrafine powders (1993)
    Springer
    Journal of materials science 28 (1993), S. 203-217 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Sintering characteristics of three kinds of iron and FeCo alloy ultrafine powders (UFPs) in vacuum and a hydrogen atmosphere were examined by continuously measuring their dimensions, and observing their structural changes. The UFPs exposed to air contain mixtures of oxide and hydroxide phases. The oxide phase increased during heating in vacuum. The compacts of the UFPs shrunk slightly at temperatures between 450 and 700 K, where the surface oxides sintered, and then densified rapidly above 700 K. The shrinkage in a stream of hydrogen occurred at much lower temperatures than that in vacuum. The reduction reaction is ratecontrolled by an interface reaction and the reduction rate of the UFPs depends on the oxidation level, where the more highly oxidized UFPs tend to the lower reduction rate. Activation energies of the reduction rate constants of the iron UFPs and FeCo UFPs lie in the range 48–59 kJ mol−1.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00349053
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  • 8
    Electronic Resource
    Electronic Resource
    Zr-Hf interdiffusion in polycrystalline Y2O3-(Zr+Hf)O2 (1982)
    Springer
    Journal of materials science 17 (1982), S. 3101-3105 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Lattice and grain-boundary interdiffusion coefficients were calculated from the concentration distributions determined for Zr-Hf interdiffusion in polycrystalline 16Y2O3·84(Zr1−x Hf x )O2 withx=0.020 and 0.100. The lattice interdiffusion coefficients were described byD=0.031 exp [−391 (kJ mol−1)/RT] cm2 sec−1 and the grain-boundary diffusion parameters byσD′=1.5×10−6exp [−309(kJ mol−1)/RT] cm3 sec−1 in the temperature range 1584–2116° C. Comparison of the results with those for the systems CaO-(Zr+Hf)O2 and MgO-(Zr+Hf)O2 indicated that the Zr self-diffusion coefficient was insensitive to the dopants in the fluorite-cubic ZrO2 solid solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01203471
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  • 9
    Electronic Resource
    Electronic Resource
    Effects of heating on the densification, structure and magnetic properties of Fe-Co alloy ultrafine powders (1991)
    Springer
    Journal of materials science 10 (1991), S. 987-991 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00721822
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  • 10
    Electronic Resource
    Electronic Resource
    Preparation of fine expanded perlite (1999)
    Springer
    Journal of materials science 34 (1999), S. 2461-2468 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Hollow glass microspheres named expanded perlite have been prepared from perlite, but the size is usually above 20 μm. Recently fine microspheres with low density are desired. In the conventional preparation method, it is difficult to produce fine expanded perlite with particle size under 20 μm because the water contained in finely milled perlite particle, which is the origin of foaming, is evolved during heating process. Fluidized sand-bed furnace is a useful tool to heat the fine particle rapidly. Using the rapid heat furnace fine expanded perlite with particle size under 15 μm and bulk density under 0.5 g/cm3 is prepared successfully. Foaming conditions are discussed by water contents and foaming temperatures. Existence states of water are interpreted by temperature-programmed desorption method and FT-IR spectrum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1004579120164
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