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  • 1
    Electronic Resource
    Electronic Resource
    Determining photothermally the thickness of a buried layer (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 1982-1985 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The conventional thermal-wave treatment following the Rosencwaig–Gersho theory is used to analyze the manner in which the properties of a layer buried within a sample influence the amplitude and the phase of surface-temperature oscillation during periodic heating by chopped light. This method can be applied to evaluate materials nondestructively in a manner similar to eddy current testing of electrically conductive layered samples: First experimental results on determining the thickness of a thin layer between an aluminum block and a 0.5-mm-thick blackened aluminum sheet are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336006
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  • 2
    Electronic Resource
    Electronic Resource
    Photothermal examination of an adhesive layer (1982)
    Springer
    Journal of nondestructive evaluation 3 (1982), S. 111-113 
    Details
    ISSN: 1573-4862
    Keywords: photoacoustic microscopy ; delamination ; layered structure ; NDE
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract An adhesive layer, by which a piezoceramic foil is attached to an aluminum membrane for telephone application, is examined in a nondestructive way by thermal waves. The basic principles of the method are outlined, and its detecting power is demonstrated by evaluation of a well-defined delamination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00568967
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  • 3
    Electronic Resource
    Electronic Resource
    Oberflächenverfestigung bei mikrotombearbeitetem Polyethylen (1980)
    Springer
    Colloid & polymer science 258 (1980), S. 1211-1216 
    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
    Description / Table of Contents: Summary Low density polyethylene rods smoothed with a microtome knife were partially covered and ion-etched in an Ar-rf-plasma. The resulting steps were measured with an inductive device (“talystep”) and plotted versus the corresponding etching periods. The resulting etching rates indicate the existence of a 1 μm thick layer of increased resistivity, deeper regions beeing removed faster. Scratches by faults of the knife represent regions of especially high deformation. Ion etching of these regions effects the formation of line by line structures, the mean frequency of which giving an estimate of the relative local orientation. Examination of these structures by a scanning electron microscope indicates the existence of toughening deformations extending until a depth of about 4 μm
    Notes: Zusammenfassung Mikrotombearbeitete Normkleinstäbe aus Polyethylen niederer Dichte wurden, teilweise abgedeckt, in einem HF-Ar-Plasma geätzt. Die dabei entstandenen Stufen wurden mit induktiven Taststiften ausgemessen und diese Ätztiefen gegen die entsprechenden Ätzzeiten aufgetragen. Die so erhaltenen Ätzraten deuten eine erhöhte Widerstandsfähigkeit einer oberflächennahen Schicht von etwa 1μm Dicke an. Tiefer liegende Schichten werden demgegenüber rascher abgebaut. Durch Messerscharten verursachte Riefen stellen Zonen besonders hoher Verformung dar. In diesen Bereich entstehen bei Ionenätzung Zeilenstrukturen, deren mittlere Häufigkeit Rückschlüsse auf den relativen Orientierungsverlauf zuläßt. Anhand rasterelektronenmikroskopischer Aufnahmen wird gezeigt, daß sich in diesen Bereich gefügeverfestigende Verformungen bis in eine Tiefe von etwa 4 ,um erstrecken.[/p]
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01668765
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  • 4
    Electronic Resource
    Electronic Resource
    Photoacoustic method for the measurement of the thermal diffusivity of drawn foils (1983)
    Springer
    Colloid & polymer science 261 (1983), S. 312-318 
    Details
    ISSN: 1435-1536
    Keywords: thermal diffusivity ; polymer foils ; drawn foils ; photoacoustic method
    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: Abstract A nonstationary method to measure the thermal diffusivity of polymer foils with thicknesses between 10 and 40μm normal to the foil plane is described. The principle of the experimental technique is a modification of the photoacoustic effect. The quantity that is measured, is the phase angle between the modulation of the light intensity and the pressure variation as a function of frequency. A theoretical treatment of the phenomenon is presented which enables the evaluation of the diffusivity from the experimental data. It is possible to measure absolute values of the thermal diffusivity with an accuracy in the order of three percent and relative changes in the thermal diffusivity, e. g. by drawing, of one percent. Measurements were performed on commercial PETP foils of 19 and 30μm thickness drawn along various directions. For draw ratios up to 1.3 the diffusivity decreased about 20 percent or increased about 10 percent, depending on the foil thickness and the treatment during manufacture. The results can be interpreted with the aggregate model of Kilian and Pietralla as well as with the two-phase model of Choy and Young.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01413937
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  • 5
    Electronic Resource
    Electronic Resource
    Gefügeveränderungen lichtstreuender Strukturen in Polyäthylenterephthalat (PETP)-Folien durch Verstrecken (1976)
    Springer
    Colloid & polymer science 254 (1976), S. 972-975 
    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
    Description / Table of Contents: Summary Commercially available PETP-films oriented by the manufacturing process are investigated by small angle light scattering (SALS). The twofold symmetry shown by the scattering patterns allows to determine two main directions of the films. Drawing into these directions results in very distinct stress strain behavior. Combined investigations with SALS, scanning electron microscope and IR absorption measurements suggest the partially crystalline and light scattering structures to be either stretched and deformed as wholes or to be “unpicked” from the edges in the direction of pulling.
    Notes: Zusammenfassung Handelsübliche PETP-Folien, die durch den Herstellvorgang bereits orientiert sind, werden durch Kleinwinkelstreuung von Licht (KWLS) untersucht. Dabei lassen sich durch die zweizählige Symmetrie der beobachteten Streufiguren zwei Vorzugsrichtungen angeben, die sich durch sehr unterschiedliches Spannungs-Dehnungs-Verhalten der Folien bei Belastung auszeichnen. Kombinierte KWLS-, Rasterelektronenmikroskop-und IR-Absorptions-Untersuchungen legen den Schluß nahe, daß je nach Belastungsrichtung entweder die lichtstreuenden teilkristallinen Überstrukturen als Ganzes belastet und verzerrt oder aber these von den Rändern her in Belastungsrichtung aufgetrennt werden.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01516913
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  • 6
    Electronic Resource
    Electronic Resource
    Physik griffbereit. Definitionen  -  Gesetze  -  Theorien. Von B. M. Jaworski und A. A. Detlaf. Friedr. Vieweg & Sohn, Braunschweig 1972. 1. Aufl., 892 S., 259 Abb., 26 Tab., geb. DM 24.80 (1974)
    Weinheim : Wiley-Blackwell
    Zeitschrift für die chemische Industrie 86 (1974), S. 107-107 
    Details
    ISSN: 0044-8249
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/ange.19740860211
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  • 7
    Electronic Resource
    Electronic Resource
    Schallemissionsanalyse an kurzglasfaserverstärkten Thermoplasten: Einfluß der Glasfaserlängenverteilung (1978)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 9 (1978), S. 302-305 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Acoustic Emission Analysis on Short Glass Fibre Reinforced Thermoplastics (GRP). - The Influence of Fibre length DistributionIn this work a model is developed which relates the length of the glass fibres to the acoustic emission curve. In this model if one assumes that it is possible to strain the matrix infinitely then the emitted acoustic emission due to fibre fracture can be qualitatively analysed. It is also assumed that the mean length of the fibres, as related to their diameter, is considered to be the most important parameter for the probability of a fibre to fracture. This probability B, is 1 for a long thin fibre, and with an ever decreasing fibre length, this value tends towards O. It is possible, with these assumptions, to predict that the acoustic emission curve will have the form ∊B exp∊B, where ∊ is the applied strain. This model is supported by experimental results.
    Notes: In der vorliegenden Arbeit wird eine Modellvorstellung über den Einfluß der Glasfaserlängenverteilung auf die Form der Schallemissionskurve entwickelt. Unter der Voraussetzung einer fast unbegrenzt dehnbaren Matrix wird der Anteil der emittierten Schallintensität, der durch Glasfaserbruch bedingt ist, qualitativ analysiert. Die mittlere Glasfaserlänge - bezogen auf die Glasfaserdicke - wird dabei als wesentliche Einflußgröße auf die spezifische Bruchwahrscheinlichkeit B der Fasern betrachtet: Für sehr lange dünne Fasern hat sie den Wert 1 und strebt mit abnehmender Faserlänge monoton gegen Null. Unter diesen Annahmen läßt sich für den Verlauf der Schallintensität eine zu ∊B · exp∊B proportionale Form vorhersagen, wobei ∊ die aufgebrachte Dehnung bedeutet. Die qualitative Richtigkeit des Modells wird experimentell bestätigt.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19780090906
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  • 8
    Electronic Resource
    Electronic Resource
    Book Review: Physik griffbereit. Definitionen - Gesetze - Theorien (Physics at Your Fingertips. Definitions - Laws - Theories). By B. M. Jaworski and A. A. Detlaf (1974)
    Weinheim : Wiley-Blackwell
    Angewandte Chemie International Edition in English 13 (1974), S. 95-95 
    Details
    ISSN: 0570-0833
    Keywords: Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/anie.197400952
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  • 9
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    Photoacoustic method for the measurement of the thermal diffusivity of drawn foils (1983)
    Springer
    Details
    Publication Date: 1983-04-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 10
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    Unknown
    Gefügeveränderungen lichtstreuender Strukturen in Polyäthylenterephthalat (PETP)-Folien durch Verstrecken (1976)
    Springer
    Details
    Publication Date: 1976-11-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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