Detail publikace
Difuze na rozhraních Al-Ni a Al-NiCr za zvýšených teplot
ČELKO, L. KLAKURKOVÁ, L. ŠVEJCAR, J.
Český název
Difuze na rozhraních Al-Ni a Al-NiCr za zvýšených teplot
Anglický název
Diffusion in Al-Ni and Al-NiCr Interfaces at Moderate Temperatures
Typ
článek v časopise - ostatní, Jost
Jazyk
en
Originální abstrakt
The diffusion couples for experimental study were prepared by HVOF spraying of nickel and nickel with 20wt.% of chromium powders onto the aluminium steet s surface. The interfaces with sharp gradient of chemical concentration of these elements were prepared. Annealing at the temperatures 600oC and 630oC, close to the Al+Al3Ni eutectic melting point (639,9oC), with different dwell times were realized. The reactants during the annealing diffuse and create layers of Al3Ni2 and Al3Ni intermediate phase compositions. Moreover, nickel without assistance of chromium diffuses preferably by using grain boundaries into aluminium substrate and produces the strengthening of the substrate by stable Al3Ni and metastable Al9Ni2 particles. The microstructures were obtained by scanning electron microscope. Layer theckness measurements were realized by means of image analyses. Chemical composition was estimated by energy dispersive microanalysis measurements. According to the results of these analyses performed the average chemical interdiffusion coefficients and Wagner s integral interdiffusion coefficients were calculated.
Český abstrakt
The diffusion couples for experimental study were prepared by HVOF spraying of nickel and nickel with 20wt.% of chromium powders onto the aluminium steet s surface. The interfaces with sharp gradient of chemical concentration of these elements were prepared. Annealing at the temperatures 600oC and 630oC, close to the Al+Al3Ni eutectic melting point (639,9oC), with different dwell times were realized. The reactants during the annealing diffuse and create layers of Al3Ni2 and Al3Ni intermediate phase compositions. Moreover, nickel without assistance of chromium diffuses preferably by using grain boundaries into aluminium substrate and produces the strengthening of the substrate by stable Al3Ni and metastable Al9Ni2 particles. The microstructures were obtained by scanning electron microscope. Layer theckness measurements were realized by means of image analyses. Chemical composition was estimated by energy dispersive microanalysis measurements. According to the results of these analyses performed the average chemical interdiffusion coefficients and Wagner s integral interdiffusion coefficients were calculated.
Anglický abstrakt
The diffusion couples for experimental study were prepared by HVOF spraying of nickel and nickel with 20wt.% of chromium powders onto the aluminium steet s surface. The interfaces with sharp gradient of chemical concentration of these elements were prepared. Annealing at the temperatures 600oC and 630oC, close to the Al+Al3Ni eutectic melting point (639,9oC), with different dwell times were realized. The reactants during the annealing diffuse and create layers of Al3Ni2 and Al3Ni intermediate phase compositions. Moreover, nickel without assistance of chromium diffuses preferably by using grain boundaries into aluminium substrate and produces the strengthening of the substrate by stable Al3Ni and metastable Al9Ni2 particles. The microstructures were obtained by scanning electron microscope. Layer theckness measurements were realized by means of image analyses. Chemical composition was estimated by energy dispersive microanalysis measurements. According to the results of these analyses performed the average chemical interdiffusion coefficients and Wagner s integral interdiffusion coefficients were calculated.
Klíčová slova česky
difuze; Al-Ni; Al-NiCr; aluminidy
Klíčová slova anglicky
diffusion; Al-Ni; Al-NiCr; aluminides
Rok RIV
2010
Vydáno
01.03.2010
Nakladatel
Trans Tech Publications
Místo
Switzerland
ISSN
1012-0386
Časopis
Defect and Diffusion Forum
Ročník
297-301
Číslo
2010
Strany od–do
771–777
Počet stran
7
BIBTEX
@article{BUT47941,
author="Ladislav {Čelko} and Lenka {Klakurková} and Jiří {Švejcar},
title="Diffusion in Al-Ni and Al-NiCr Interfaces at Moderate Temperatures",
journal="Defect and Diffusion Forum",
year="2010",
volume="297-301",
number="2010",
month="March",
pages="771--777",
publisher="Trans Tech Publications",
address="Switzerland",
issn="1012-0386"
}