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  • 1
    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 A new combination of three-point bending stress and electron spin resonance (ESR) methods was developed and successfully tested in the field of glassy and ceramic materials. Summarizing the observed phenomena, one can establish the following advantages of such an experimental combination: (i) direct and continuous observation of the material under the action of bending stress up to mechanical destruction of the sample; (ii) optically transparent samples are not necessary, but a further direct combination with optical methods is, in general, possible; (iii) the high sensitivity and selectivity of the ESR method allow the first steps of stress influence on the local geometry to be followed long before the crack appears and fracture takes place, respectively; (iv) local effects are observed on the atomic scale which can be related to the mechanical properties by an appropriate hamiltonian; (v) the reversibility of the effects can easily be proved by a suitable alternating stress/relaxation regime; (vi) variation of further parameters such as temperature or application of tensile stress, is possible.
    Type of Medium: Electronic Resource
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