. "The subject of the proposal is the study of migration characteristics of hydrogen in fourteen Ni3A1-based alloys in dependence on temperature chosen from interval 650-1200 K and on concentration of the third alloying element M (M=B,Cr,Fe and Zr). The measurements of hydrogen permeability will be carried out with mono-phase alloys by permeation technique. The proposed issue is at the top of interest of many scientific teams in recent years, since the H-induced brittlenes of Ni3Al, and of intermetalliin general, is the crucial obstacle on the way to much wider application of intermetallics into the technical practice. The new experimental results obtained in present project will shed some light into the kinetics of brittle-to-ductile transformation."@en . . "Permeabilita vod\u00EDku intermetalick\u00FDmi slitinami na b\u00E1zi Ni3Al" . "Neuvedeno."@en . "http://www.isvav.cz/projectDetail.do?rowId=GA106/99/1179"^^ . "0"^^ . . . . . "0"^^ . "GA106/99/1179" . "1"^^ . . . . . "Projekt \u0159e\u0161\u00ED aktu\u00E1ln\u00ED probl\u00E9m sv\u011Btov\u00E9ho v\u00FDzkumu a sice vod\u00EDkovou permeabilitu ve slitin\u00E1ch Ni3Al s Fe a Cr. Tyto v\u00FDsledky jsou citliv\u00E9 na \u0159adu faktor\u016F, jako je nap\u0159. rozpustnost vod\u00EDku v z\u00E1vislosti na teplot\u011B, teplotn\u00ED z\u00E1vislost koeficientu difuse vod\u00EDku"@cs . "9"^^ . "2003-04-01+02:00"^^ . "9"^^ . "P\u0159edm\u011Btem n\u00E1vrhu je studium migra\u010Dn\u00EDch charakteristik vod\u00EDku ve \u010Dtrn\u00E1cti intermetalick\u00FDch slitin\u00E1ch na b\u00E1zi Ni3Al, a to v z\u00E1vislosti na teplot\u011B a koncentraci t\u0159et\u00EDho leguj\u00EDc\u00EDho prvku. M\u011B\u0159en\u00ED bude provedeno permea\u010Dn\u00ED metodou v teplotn\u00EDm intervalu 650-1200K a leguj\u00EDc\u00EDmi prvky budou b\u00F3r, chr\u00F3m, \u017Eelezo a zirkon. Koncentrace t\u011Bchto p\u0159\u00EDm\u011Bs\u00ED bude volena tak, aby p\u0159i zvolen\u00FDch teplot\u00E1ch byla experiment\u00E1ln\u00ED slitina v\u017Edy jednof\u00E1zov\u00E1. T\u00E9ma pat\u0159\u00ED do oblasti, kter\u00E1 je v posledn\u00ED dob\u011B v pop\u0159ed\u00ED badatelsk\u00E9ho z\u00E1jmu; intermetalika na b\u00E1zi nikl aluminid\u016F jsou nad\u011Bjn\u00E9 materi\u00E1ly nasazovan\u00E9 v extr\u00E9mn\u00EDch podm\u00EDnk\u00E1ch nam\u00E1h\u00E1n\u00ED. Jejich k\u0159ehkost v\u0161ak br\u00E1n\u00ED jejich masivn\u00EDmu roz\u0161\u00ED\u0159en\u00ED v praxi. V sou\u010Dasn\u00E9 dob\u011B p\u0159eva\u017Euje n\u00E1zor, \u017Ee hlavn\u00ED p\u0159\u00ED\u010Dinou k\u0159ehkosti je p\u0159edev\u0161\u00EDm citlivost np\u0159\u00EDtomnost extern\u00EDch degrada\u010Dn\u00EDch faktor\u016F - zejm\u00E9na vod\u00EDku - v okoln\u00EDm prost\u0159ed\u00ED. P\u0159es pom\u011Brn\u011B \u010Detn\u00E9 a rozs\u00E1hl\u00E9 studie v oblasti mechanick\u00FDch vlastnost\u00ED dosud chyb\u00ED spolehliv\u00E9 \u00FAdaje o migra\u010Dn\u00EDch charakteristik\u00E1ch vod\u00EDku v t\u011Bchto materi\u00E1lech. V\u00FDsledky dos" . . . . . . . "Hydrogen permeation in Ni3Al-based intermetallic alloys"@en .