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Description
  • Jelikož Al-Cu-Fe kvazikrystaly jsou velmi křehké pod 700 K, kvazikrystalická vrstva deponovaná na oceli byla použita k mechanické spektroskopii za teplot 300-800 K. Vnitřní tření tohoto kompozitu bylo měřeno v torzním kyvadle a vnitřní tření v samotné vrstvě bylo vypočteno. Maximum vnitřního tření je pozorováno okolo 600 K v izochronním měření při 1 Hz, ale není pozorováno při izotermálním měření. Toto maximum může souviset s relaxací termických napětí mezi substrátem a vrstvou. Tyto napětí též mohou za anomální vzrůst smykového modulu s teplotou. Vysokoteplotní exponenciální pozadí je interpretováno jako počátek přechodu křehký-tvárný v kvazikrystalické vrstvě. (cs)
  • Since the bulk Al-Cu-Fe quasicrystals are extremely brittle below 700 K, a quasicrystalline coating deposited on a steel substrate by thermal spraying was used for mechanical spectroscopy measurements at temperatures in the range of 300-800 K. The internal friction of this composite was measured in a forced torsion pendulum and the internal friction of the quasicrystalline coating itself was calculated. An internal friction maximum was observed around 600 K in isochronal measurements at 1 Hz, which is not present in isothermal measurements. This maximum may be associated with the relaxation of the thermal stresses built at the interface between the substrate and the coating. These stresses are also responsible for an anomalous increase of the shear modulus with temperature. The high temperature exponential background is interpreted as the brittle-to-ductile transition in the quasicrystalline coating.
  • Since the bulk Al-Cu-Fe quasicrystals are extremely brittle below 700 K, a quasicrystalline coating deposited on a steel substrate by thermal spraying was used for mechanical spectroscopy measurements at temperatures in the range of 300-800 K. The internal friction of this composite was measured in a forced torsion pendulum and the internal friction of the quasicrystalline coating itself was calculated. An internal friction maximum was observed around 600 K in isochronal measurements at 1 Hz, which is not present in isothermal measurements. This maximum may be associated with the relaxation of the thermal stresses built at the interface between the substrate and the coating. These stresses are also responsible for an anomalous increase of the shear modulus with temperature. The high temperature exponential background is interpreted as the brittle-to-ductile transition in the quasicrystalline coating. (en)
Title
  • Mechanical spectroscopy of Al-Cu-Fe quasicrystalline coatings
  • Mechanical spectroscopy of Al-Cu-Fe quasicrystalline coatings (en)
  • Mechanická spektroskopie Al-Cu-Fe kvazikrystalických vrstev (cs)
skos:prefLabel
  • Mechanical spectroscopy of Al-Cu-Fe quasicrystalline coatings
  • Mechanical spectroscopy of Al-Cu-Fe quasicrystalline coatings (en)
  • Mechanická spektroskopie Al-Cu-Fe kvazikrystalických vrstev (cs)
skos:notation
  • RIV/00216224:14310/04:00011000!RIV08-MSM-14310___
http://linked.open.../vavai/riv/strany
  • 524-530
http://linked.open...avai/riv/aktivita
http://linked.open...avai/riv/aktivity
  • Z(MSM 143100002)
http://linked.open...iv/cisloPeriodika
  • 1-2
http://linked.open...vai/riv/dodaniDat
http://linked.open...aciTvurceVysledku
http://linked.open.../riv/druhVysledku
http://linked.open...iv/duvernostUdaju
http://linked.open...titaPredkladatele
http://linked.open...dnocenehoVysledku
  • 572708
http://linked.open...ai/riv/idVysledku
  • RIV/00216224:14310/04:00011000
http://linked.open...riv/jazykVysledku
http://linked.open.../riv/klicovaSlova
  • quasicrystals; Al-Cu-Fe; internal friction; mechanical spectroscopy; thick films; coatings (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • NL - Nizozemsko
http://linked.open...ontrolniKodProRIV
  • [099628946BB8]
http://linked.open...i/riv/nazevZdroje
  • Materials Science and Engineering A
http://linked.open...in/vavai/riv/obor
http://linked.open...ichTvurcuVysledku
http://linked.open...cetTvurcuVysledku
http://linked.open...UplatneniVysledku
http://linked.open...v/svazekPeriodika
  • 370
http://linked.open...iv/tvurceVysledku
  • Fikar, Jan
  • Baluc, Nadine
  • Schaller, Robert
http://linked.open...n/vavai/riv/zamer
issn
  • 0921-5093
number of pages
http://localhost/t...ganizacniJednotka
  • 14310
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