"Carbon diffusion in extremely carbon-supersaturated ferrite and austenite alloys"@en . . . "Project deals with the carbon diffusion in carbon supersaturated Fe-based alloys. Diffusion coefficients of carbon in all the studied materials are significantly lower than those known for respective materials with equilibrium carbon concentration. This fact may influence further studies in this field. Publication activity exhibits lower intensity. Panel P108 evaluates project as accomplished."@en . "1"^^ . . . . . "GAP108/11/0148" . . . "0"^^ . . "2014-07-01+02:00"^^ . "0"^^ . . . "2013-06-07+02:00"^^ . "We propose to study the rate of carbon diffusion in carbon-supersaturated BCC and FCC phases of chosen Fe and Ni based alloys. The carbon supersaturation may be produced, e.g., as a result of a phase transformation of advanced materials or under a great concentration gradient in protective surface layer.\u00A0 Contrary to the fact that carbon diffusion coefficient is relatively high the mean diffusion path of carbon diffusion during the material production and/or during the projected service of the construction component may be very short due to low temperature. It means that carbon supersaturation is kept during the whole service time of the material. With respect to such conditions, it is desirable to know carbon diffusion coefficient in carbon-supersaturated matrices, which enables (i) to estimate the residual lifetime of the material and (ii) to design new types of material. The principal experimental method is very fine SIMS depth profiling. The results of the proposed study will elucidate kinetics of the process and/or sability of carbon-supersaturated materials."@en . "Projekt se zab\u00FDval dif\u00FAz\u00ED uhl\u00EDku v p\u0159esycen\u00FDch matric\u00EDch slitin na b\u00E1zi \u017Eeleza. Nejv\u00FDznamn\u011Bj\u0161\u00EDm (a neo\u010Dek\u00E1van\u00FDm) v\u00FDsledkem jsou \u0159\u00E1dov\u011B ni\u017E\u0161\u00ED hodnoty koeficientu dif\u00FAze uhl\u00EDku v p\u0159esycen\u00FDch f\u00E1z\u00EDch. Tento efekt m\u016F\u017Ee ovlivnit pohled na f\u00E1zov\u00E9 transformace, studovan\u00E9 v modern\u00ED metalurgii. Pl\u00E1novan\u00E9 c\u00EDle byly spln\u011Bny. Publika\u010Dn\u00ED aktivita byla sp\u00ED\u0161e pr\u016Fm\u011Brn\u00E1. Panel hodnot\u00ED v\u00FDsledky \u0159e\u0161en\u00ED jako spln\u011Bno."@cs . "14"^^ . . "http://www.isvav.cz/projectDetail.do?rowId=GAP108/11/0148"^^ . . "Dif\u00FAze uhl\u00EDku v uhl\u00EDkem extr\u00E9mn\u011B p\u0159esycen\u00FDch feritick\u00FDch a austenitick\u00FDch slitin\u00E1ch" . . "14"^^ . . . . . . "2013-12-31+01:00"^^ . "carbon diffusion ferritic steel austenitic steel carbon supersaturation"@en . "2011-01-01+01:00"^^ . "Bude studov\u00E1na rychlost dif\u00FAze uhl\u00EDku v uhl\u00EDkem siln\u011B p\u0159esycen\u00FDch tuh\u00FDch roztoc\u00EDch vybran\u00FDch slitin na b\u00E1zi Fe a Ni se strukturou BCC a FCC. Se siln\u00FDm p\u0159esycen\u00EDm uhl\u00EDkem se lze setkat\u00A0nap\u0159. po f\u00E1zov\u00E9 transformaci n\u011Bkter\u00FDch pokro\u010Dil\u00FDch materi\u00E1l\u016F, nebo v koncentra\u010Dn\u00EDm gradientu uhl\u00EDku pod uhl\u00EDkem bohat\u00FDmi povrchov\u00FDmi ochrann\u00FDmi povlaky. P\u0159esto\u017Ee dif\u00FAze uhl\u00EDku je relativn\u011B velmi rychl\u00E1, v d\u016Fsledku n\u00EDzk\u00FDch teplot p\u0159i vlastn\u00ED v\u00FDrob\u011B nebo b\u011Bhem aplikace materi\u00E1lu v provozu m\u016F\u017Ee p\u0159esycen\u00ED uhl\u00EDkem p\u0159etrvat. S ohledem k t\u00E9to okolnosti je velmi \u017E\u00E1douc\u00ED zn\u00E1t kvantitativn\u00ED \u00FAdaje (koeficienty dif\u00FAze) o dif\u00FAzi uhl\u00EDku v p\u0159esycen\u00E9 matrici,\u00A0kter\u00E9 mj. umo\u017En\u00ED (i) odhad zbytkov\u00E9 \u017Eivotnosti materi\u00E1lu a (ii) n\u00E1vrh materi\u00E1l\u016F nov\u00FDch. Nosnou experiment\u00E1ln\u00ED metodou je SIMS s mo\u017Enost\u00ED m\u011B\u0159en\u00ED hloubkov\u00FDch koncentra\u010Dn\u00EDch\u00A0profil\u016F. V\u00FDsledky umo\u017En\u00ED hlub\u0161\u00ED porozum\u011Bn\u00ED kinetiky p\u0159erozd\u011Blov\u00E1n\u00ED uhl\u00EDku v p\u0159esycen\u00FDch matric\u00EDch a posouzen\u00ED jejich stability" . .