Oxidation of boiler steels - RWTH Aachen University
Oxidation of boiler steels - RWTH Aachen University
Oxidation of boiler steels - RWTH Aachen University
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7 th GTT-Workshop, May 2005<br />
soluble<br />
N-con. [at.%]<br />
for 0,5 atm<br />
UNIVERSITÄT<br />
SIEGEN<br />
0,0040<br />
0,0035<br />
0,0030<br />
0,0025<br />
0,0020<br />
0,0015<br />
0,0010<br />
0,0005<br />
0,0000<br />
(Krupp et al. ; Ox. Metals, 1999)<br />
Internal nitridation <strong>of</strong> Ni-base alloys<br />
Calcualtion <strong>of</strong> nitrogen solubility<br />
temperature<br />
0 10 20 30<br />
Cr concentration [wt.%]<br />
Institut für Werkst<strong>of</strong>ftechnik<br />
1000°C<br />
Cr-nitride precipitation<br />
900°C<br />
800°C<br />
Berechnung des Diffusionskoeffizienten:<br />
Lehrstuhl für Materialkunde und Werkst<strong>of</strong>fprüfung
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