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Statements

Subject Item
n2:RIV%2F00216305%3A26220%2F10%3APU87347%21RIV11-GA0-26220___
rdf:type
n8:Vysledek skos:Concept
dcterms:description
The electro-ultrasonic spectroscopy was used as a non-destructive testing method for the magnesium composites evaluation. AC current varying with frequency fE and the ultrasonic signal varying with frequency fU are applied on the conducting sample and a new intermodulation signal on the frequency fm given by the superposition or subtraction of exciting frequencies is measured on the sample. We have measured on intermodulation frequency fm = fE - fU. This method can be used as a diagnostic tool for the quality and reliability assessment. The sample resistance is influenced by the ultrasonic signal. The ultrasonic signal changes the contact area between the conducting grains in the sample structure and then resistance is modulated by the frequency of ultrasonic excitation. The electrical charge and also the electrical current flowing through the sample structure are conserved. In case the contact area between the conducting grains is changing then the current density is changed. This leads to the resist The electro-ultrasonic spectroscopy was used as a non-destructive testing method for the magnesium composites evaluation. AC current varying with frequency fE and the ultrasonic signal varying with frequency fU are applied on the conducting sample and a new intermodulation signal on the frequency fm given by the superposition or subtraction of exciting frequencies is measured on the sample. We have measured on intermodulation frequency fm = fE - fU. This method can be used as a diagnostic tool for the quality and reliability assessment. The sample resistance is influenced by the ultrasonic signal. The ultrasonic signal changes the contact area between the conducting grains in the sample structure and then resistance is modulated by the frequency of ultrasonic excitation. The electrical charge and also the electrical current flowing through the sample structure are conserved. In case the contact area between the conducting grains is changing then the current density is changed. This leads to the resist
dcterms:title
Electro Ultrasonic Spectroscopy of Magnesium Composites Electro Ultrasonic Spectroscopy of Magnesium Composites
skos:prefLabel
Electro Ultrasonic Spectroscopy of Magnesium Composites Electro Ultrasonic Spectroscopy of Magnesium Composites
skos:notation
RIV/00216305:26220/10:PU87347!RIV11-GA0-26220___
n3:aktivita
n7:P
n3:aktivity
P(GA106/07/1393), P(GD102/09/H074)
n3:cisloPeriodika
5/2010
n3:dodaniDat
n14:2011
n3:domaciTvurceVysledku
n11:5258162 n11:6541763 n11:9770690 n11:5802407
n3:druhVysledku
n12:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n4:predkladatel
n3:idSjednocenehoVysledku
256686
n3:idVysledku
RIV/00216305:26220/10:PU87347
n3:jazykVysledku
n16:eng
n3:klicovaSlova
Electric signal, ultrasonic signal, resistance change
n3:klicoveSlovo
n10:ultrasonic%20signal n10:resistance%20change n10:Electric%20signal
n3:kodStatuVydavatele
CZ - Česká republika
n3:kontrolniKodProRIV
[7FC98EC16015]
n3:nazevZdroje
Jemná mechanika a optika
n3:obor
n18:BE
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
4
n3:projekt
n13:GA106%2F07%2F1393 n13:GD102%2F09%2FH074
n3:rokUplatneniVysledku
n14:2010
n3:svazekPeriodika
55
n3:tvurceVysledku
Šikula, Josef Tofel, Pavel Trčka, Tomáš Sedláková, Vlasta
s:issn
0447-6441
s:numberOfPages
3
n17:organizacniJednotka
26220