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Physical–mechanical, superconducting, thermo-physical properties and interphase phenomena of polymer–ceramic nano-composites

✍ Scribed by S.P. Davtyan; A.O. Tonoyan; Christoph Schick; A.A. Tataryan; A.G. Sargsyan


Publisher
Elsevier Science
Year
2008
Tongue
English
Weight
543 KB
Volume
200
Category
Article
ISSN
0924-0136

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✦ Synopsis


Physical-mechanical properties of superconducting polymer-ceramic composites, obtained on the basis of oxide ceramics Y 1 Ba 2 Cu 3 O 7-x and a number of polymeric binders have been investigated. As it could be expected, the decrease of temperature of composite experiments till cryogen temperature leads to a rigid decrease of deformation of materials. However, it increases their resistance to rupture.

The influence of granule metrical content and degree of filling Y 1 Ba 2 Cu 3 O 7-x by ceramic on the interstitial boundary, the module of flexibility, elongation, and on the critical temperature of transition into superconducting condition has been investigated. It has been discovered, that regardless of the size of ceramic's grains, the increase of its amount leads to the increase of resistance to rupture, module and to the decrease of limiting deformation, whereas the increase of average sizes of ceramic's grains worsens resistant properties.

However, it increases superconducting properties of composites.

Thermo-physical properties for superconducting polymer-ceramic composites with superhighmolecular polyethylene and isotactic polypropylene binders has been investigated. For the composites mentioned the increase of melting heats has been found out. This has been explained by intercalation of macromolecules' fragments into the interstitial layer of ceramics' grains. This phenomena leads to the change of morphological structure of superconducting nano-composites obtained. The latter has been proved by electron microscopy.


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