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  • Articles  (47)
  • 1965-1969  (47)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (47)
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  • Articles  (47)
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  • 1
    Electronic Resource
    Electronic Resource
    A review of semiconductor heterojunctions (1967)
    Springer
    Journal of materials science 2 (1967), S. 88-96 
    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 The article serves as an introduction to a comprehensive list of references on semiconductor heterojunctions. Several methods of producing such structures are given, together with a table of materials between which heterojunctions have been formed. The more important measurements which are made on semiconductor heterojunctions are discussed and typical results quoted. A brief description of band models proposed for various heterojunctions is given. The references are arranged by year and in alphabetical order for convenience. Several articles are included which are not referred to in the text: these articles are included since they discuss certain theoretical aspects and possible practical applications of semiconductor heterojunctions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00550056
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  • 2
    Electronic Resource
    Electronic Resource
    The determination of the diffusion constants of oxygen in nickel and α-iron by an internal oxidation method (1969)
    Springer
    Journal of materials science 4 (1969), S. 797-801 
    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 The diffusion constants of oxygen in nickel and α-iron are calculated from experimentally determined internal oxidation rates in dilute silicon-bearing alloys. A single crystal alloy of composition 0.058 wt % silicon in nickel and polycrystalline alloys of composition 0.48 wt % silicon in nickel and 0.072 wt % silicon in iron were oxidised and allowance is made for the absorption of oxygen in the reaction with silicon. For nickel the values of activation energy Q=73.9 kcal/g atom in the range 800 to 1200° C and Q=74.4 kcal/g atom in the range 900 to 1300° C are in good agreement with a previous result. The activation energy required for oxygen diffusion in α-iron was found to be 39.9 kcal/g atom in the range 700 to 850° C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00551075
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  • 3
    Electronic Resource
    Electronic Resource
    The influence of boundary layer growth on shock tube test times (1968)
    Springer
    Flow, turbulence and combustion 18 (1968), S. 116-155 
    Details
    ISSN: 1573-1987
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Summary A theoretical and experimental investigation of the limitation on shock tube test times which is caused by the development of laminar and turbulent boundary layers behind the incident shock is presented. Two theoretical methods of predicting the test time have been developed. In the first a linearised solution of the unsteady one-dimensional conservation equations is obtained which describes the variations in the average flow properties external to the boundary layer. The boundary layer growth behind the shock is related to the actual extent of the hot flow and not, as in previous unsteady analyses, to its ideal extent. This new unsteady analysis is consequently not restricted to regions close to the diaphragm. Shock tube test times are determined from calculations of the perturbed shock and interface trajectories. In the second method a constant velocity shock is assumed and test times are determined by approximately satisfying only the condition of mass continuity between the shock and the interface. A critical comparison is made between this and previous theories which assume a constant velocity shock. Test times predicted by the constant shock speed theory are generally in agreement with those predicted by the unsteady theory, although the latter predicts a transient maximum test time in excess of the final asymptotic value. Shock tube test times have also been measured over a wide range of operating conditions and these measurements, supplemented by those reported elsewhere, are compared with the predictions of the theories; good agreement is generally obtained. Finally, a simple method of estimating shock tube test times is outlined, based on self similar solutions of the constant shock speed analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00382342
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  • 4
    Electronic Resource
    Electronic Resource
    Über die grenzflächenenergetische Zustandsfunktion (1965)
    Springer
    Colloid & polymer science 201 (1965), S. 52-57 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung Im Anschluß an vorangehende Untersuchungen, die ergeben hatten, daß zwischen den drei grenzflächenenergetischen Grundgrößen Festkörperoberflächenspannung, Flüssigkeitsoberflächenspannung und Grenzflächenspannung fest/flüssig eine Beziehung in der Art einer Zustandsgieichung besteht, werden in der vorliegenden Untersuchung mögliche Formulierungen dieser Zustandsgieichung diskutiert. Es wird gezeigt, daß der Quotient aus Adhäsionsarbeit und geometrischem Mittel der beiden Kohäsionsarbeiten in dem bisher zugänglichen Bereich von Festkörpern und Flüssigkeiten eine eindeutige Funktion der Grenzflächenspannung ist. Es wird diskutiert, ob diese Zustandsgieichung unabhängig vom Aggregatzustand ist, d. h. also insbesondere auch Systeme flüssig/flüssig beschreibt. Aus dem bisher vorliegenden Meßmaterial an Systemen fest/flüssig wurde die grenzflächenenergetische Zustandsfläche konstruiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01497080
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  • 5
    Electronic Resource
    Electronic Resource
    Über die grenzflächenenergetische Zustandsfunktion, II (1965)
    Springer
    Colloid & polymer science 204 (1965), S. 101-105 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Zusammenfassung Im Anschluß an die für kleine Werte der grenzflächenenergetischen Grundgrößen Festkörperoberflächenspannung, Flüssigkeitsoberflächenspannung und Grenzflächenspannung fest/flüssig in einer vorangegangenen Untersuchung (1) formulierte grenzflächenenergetische Zustandsgleichung wird gezeigt, wie aus einer einzigen Flüssigkeitsoberflächenspannung und einem Randwinkel zwischen einem Festkörper und dieser Flüssigkeit die zugehörige Festkörperoberflächenspannung berechnet werden kann. Es werden theoretisch berechnete Kurven mit experimentellen Daten verglichen. Im Bereich großer Energiewerte kann die Zustandsgleichung zwischen den grenzflächenenergetischen Grundgrößen im Rahmen des vorhandenen Meßmaterials durch eine additive Beziehung beschrieben werden. Als Beispiel für die Anwendbarkeit der hier entwickelten energetischen Vorstellungen wird der Zusammenhang zwischen Haftfestigkeit und Adhäsionsarbeit diskutiert.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01500385
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  • 6
    Electronic Resource
    Electronic Resource
    Die Temperaturabhängigkeit der Oberflächenspannung von Cholesterylstearat (1968)
    Springer
    Colloid & polymer science 222 (1968), S. 160-161 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , 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/BF01510801
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  • 7
    Electronic Resource
    Electronic Resource
    Self-diffusion in simple oxides (A bibliography) (1968)
    Springer
    Journal of materials science 3 (1968), S. 206-222 
    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 The paper is directed towards the materials scientist who wishes to employ published values of diffusion coefficients in his investigations. A brief review of self-diffusion behaviour and the likely inaccuracies of the various techniques used in the measurement of diffusion is followed by a selected bibliography and tabulation of coefficients for oxides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00585489
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  • 8
    Electronic Resource
    Electronic Resource
    Book reviews (1967)
    Springer
    Journal of materials science 2 (1967), S. 199-200 
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00549582
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  • 9
    Electronic Resource
    Electronic Resource
    Temperature coefficients of capacitance of solids (1969)
    Springer
    Journal of materials science 4 (1969), S. 370-374 
    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 An earlier treatment of temperature coefficient of capacitance, γ c [1] has been extended to include most solids. Materials are divided into those with given ranges of permittivity, ε, and temperature coefficient of polarisability. It appears that, for low dielectric loss, high permittivity glasses, like simple ionic compounds, always have a positive γ c, whereas paraelectrics and polymers have negative γ c. Ferroelectrics can have any value of γ c. Limitations in γ c and ε for given classes of solid are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00550407
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  • 10
    Electronic Resource
    Electronic Resource
    An experimental investigation of the structure of some internally oxidised ferromagnetic alloys (1969)
    Springer
    Journal of materials science 4 (1969), S. 359-369 
    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 Results are presented of optical, scanning electron and transmission electron microscope observations on some internally oxidised ferromagnetic alloys. The alloys investigated were of nominal composition 0.058 wt % Si in Ni, 0.48 wt % Si in Ni and 0.17 wt % Si in Co 66.2%-Ni 33.7%. The alloys were in polycrystalline form and in addition single crystals of 0.058 wt % Si in Ni were examined. The diffusion and oxidation rate constants are calculated and the state of the oxide product as a function of (i) depth in the alloy, (ii) oxidising temperature and (iii) alloy composition is considered. The possibility of using such systems as device material and as test material for theories of coercivity and approach to magnetic saturation is considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00550406
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