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  • 1985-1989  (36)
  • 1988  (22)
  • 1985  (14)
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  • 1985-1989  (36)
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  • 1
    Electronic Resource
    Electronic Resource
    Magnetic properties and microstructure of magnesium-doped Nd-Fe-B magnets (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 5513-5515 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A number of Nd15 Fe79−x Mgx B6 magnets with x up to 0.41 and pseudoternary Nd2(Fe1−yMgy)14B compounds with y up to 0.081 have been prepared by conventional powder metallurgy processes. Magnetic measurements indicate that for the magnet alloys i Hc increases as x increases up to 0.25 without a loss in Br, hence the (BH)max values are slightly enhanced. The maximum increase in i Hc is about 15% for x=0.25. Extensive Mg-rich precipitates inside the Nd-rich phase have been observed by electron probe microanalysis (EPMA). Higher Mg intensity at grain boundaries is also detected by EPMA. The reasons for the i Hc increase might be the grain boundary cleaning ability of Mg dopant. For the pseudoternary compounds, the anisotropy field HA is found to increase only slightly due to Mg doping while TC remains practically unchanged.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342320
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  • 2
    Electronic Resource
    Electronic Resource
    Structural and magnetic properties of pseudoternary Nd2(Fe1−xCux)14B compounds (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 2739-2741 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic and crystallographic measurements have been made on new pseudoternary compounds Nd2(Fe1−xCux)14B in order to study the systematic variation of magnetic properties with Cu substitution. X-ray powder diffraction data indicate that the tetragonal Nd2Fe14B-type phase exists only for x≤0.05. Partial replacement of Fe by nonmagnetic Cu significantly decreases the saturation magnetization value with little change in ferromagnetic Curie temperature TC. Low-temperature spin orientation temperature (Tsr) decreases from 135 K for x=0.00 to 130 K for x=0.03, and 122 K for x=0.05, and the tilt angle of the easy magnetization direction from the tetragonal c axis decreases accordingly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340969
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Magnetic and crystallographic properties of the permanent magnet systems (R1−xScx)2Fe14B (R=Y, Nd, Dy, Er, Lu) (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 5546-5548 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic and crystallographic measurements have been made on the rare-earth iron boride systems (R1−xScx)2Fe14B (R=Y, Nd, Dy, Er, Lu). Powder x-ray diffraction data indicate that a Nd2Fe14B-type single phase persists up to x=0.2 with lattice parameters decreasing slightly due to the smaller metallic radius of the Sc3+ ions. The variation of magnetic moments per formula unit with nonmagnetic Sc substitution depends on the smaller Sc size and the nature of the magnetic alignment of the rare-earth sublattice (nonmagnetic in Y and Lu, ferromagnetic axial in Nd, ferromagnetic planar in Er, and antiferromagnetic axial in Dy) with respect to the iron sublattice. The Curie temperature TC decreases monotonically with progressive addition of Sc atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342331
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  • 4
    Electronic Resource
    Electronic Resource
    Hard sphere treatment of binary diffusion in liquid at high dilution up to the critical temperature (1985)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 2052-2055 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Binary diffusion coefficients at high dilution are measured for ethane and ethylene dissolved in cyclohexane at temperatures from 280.5 to 363.2 K and for benzene in cyclohexane and n-hexane up to their critical temperatures. With the effective hard-sphere diameters backed out from self-diffusion data from both solute and solvent molecules and fitted to Protopapas, Anderson, and Parlee's formula, the prediction with the Sung–Stell theory is found to agree to within ±7% of experimental data for wide ranges of solute-to-solvent mass and size ratios at temperatures up to the critical point.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.448390
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Electrostatic model for protein/reverse micelle complexation (1988)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 89 (1988), S. 545-550 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Thermodynamics of protein solubilization in water-in-oil microemulsions is analyzed in terms of the shell-and-core model for reverse micelles. The electrostatic contribution to the free energy of transfer of the protein from the aqueous solution to the microemulsion is determined via the solution of the nonlinear Poisson–Boltzmann equation for the protein/reverse micelle complex, for the protein-free micelle, and for the cell model of aqueous protein solution in equilibrium with the microemulsion. The electrolyte effect on the protein solubility in the microemulsion is studied. A good agreement between the predictions of the model and the known salting out effect of cytochrome-c in sodium di-2-ethylhexylsulfosuccinate AOT-water-in-isooctane microemulsion is observed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.455443
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  • 6
    Electronic Resource
    Electronic Resource
    Fast turbulent correlations from phase coherence velocimetry (1985)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 56 (1985), S. 1831-1832 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Flows with coherent structures allow see-free measurements of local velocity and velocity fluctuations. Continuous turbulent velocity histories in ionizing shock waves are obtained at a 10-MHz sampling rate. From this, correlation profiles and frequency spectra are determined which reveal the presence of prominent high-frequency components.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138103
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  • 7
    Electronic Resource
    Electronic Resource
    Transmission electron microscopy studies on the lateral growth of nickel silicides (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 258-263 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Transmission electron microscopy (TEM) has been utilized to study the nickel-silicide growth in self-supported lateral-diffusion, thin-film couples by overlapping deposited layers of Ni and Si between two silicon oxide deposited films. Energy-dispersive x-ray spectroscopy, microdiffraction, and selected area diffraction were used to identify the Ni-silicide phases and their crystal structures. Long-grain growth of Ni2Si, as a result of phase-boundary migration induced by diffusion, was observed during in situ annealing between 500 and 750 °C in TEM. No preferred orientation or particular crystallographic relationship was found among the long grains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335482
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  • 8
    Electronic Resource
    Electronic Resource
    Stress relaxation during thermal cycling in metal/polyimide layered films (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 6690-6698 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The stress relaxation behavior during thermal cycling of metal/quartz and metal/polyimide/quartz layered structures has been investigated using a cantilever bending beam technique. The metals chosen for this study include Cu and Cr, two materials with contrasting mechanical and interfacial bonding properties. A finite element analysis, as well as an analytical calculation, has been carried out to deduce the stress distribution in the layered structures. Results indicate that the extent of stress relaxation strongly depends on the intrinsic mechanical property of the metal film with significantly higher stresses residing in the Cr film than in the Cu film. The interfacial polyimide layer has been found to serve as an effective buffering layer to reduce the residual stress in metal films. Observations from transmission electron microscopy suggest that the stress is partially released through the deformation of the polyimide near the metal/polyimide interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.341999
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Structure and dynamics in three-component microemulsions (1985)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 89 (1985), S. 711-713 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100250a030
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  • 10
    Electronic Resource
    Electronic Resource
    A reexamination of the synthesis of liquid crystalline side-chain polyacrylates via liquid-liquid phase-transfer catalysis (1988)
    s.l. : American Chemical Society
    Macromolecules 21 (1988), S. 904-907 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00182a009
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    Paper (German National Licenses)
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