Abstract
Steel plates (St 14-05) of 1.5 mm thickness and coated with 1.5 μm of ironzinc-phosphatehydrate (ASTM 29-1429) were irradiated with an XeCl-excimer laser (Siemens XP 2020) at energy densities of 20–80 mJ/mm2 and with 2–32 pulses per spot. Depth-sensitive Mössbauer spectroscopy was carried out by means of conversion electron (CEMS) and conversion X-ray (CXMS) Mössbauer spectroscopy in order to determine the phases produced by the excimer laser treatment. Although the phosphate layer is mainly ablated during the laser treatment, there is a significant formation of Fe2P. The phosphorous phase and the wüstite, with changing stoichiometries, were found in the very surface (CEMS). In deeper layers and in correlation with the energy density and the number of pulses, austenite was found in surprisingly high amounts (CEMS and CXMS). The austenite was found to be nitrogen austenite. The high Fe-N austenite content as well as the presence of some ferromagnetic Fe-N phase (ε-Fe2+xN) must be ascribed to an unexpectedly high nitriding effect during the laser treatment.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
H.W. Bergmann, E. Schubert, K.J. Schmatjko and J. Dembowski, Thin Solid Films 174(1989)33.
H.W. Bergmann and E. Schubert, Review on materials processing with excimer lasers, in:Proc. 3rd Eur. Conf. on Laser Treatment of Materials, ECLAT 1990, Erlangen, Germany (Sprechsaal Publ. Group, Coburg, 1990) pp. 813–824.
J.G. Lunney, J.V. Armstrong, J.M.D. Coey and M.E.G. Lyons, SPIE-Excimer Lasers Appl. 1023(1988)216.
F.E. Wagner, J. de Phys. 37(1976)C6–673.
G. Rixecker, P. Schaaf and U. Gonser, J. Phys. D26(1993)870.
W. Meisel, J. de Phys. 41(1980)C1–63.
U. Gonser, P. Schaaf and F. Aubertin, Hyp. Int. 66(1991)95.
P. Schaaf, A. Krämer, L. Blaes, G. Wagner, F. Aubertin and U. Gonser, Nucl. Instr. Meth. B53(1991)184.
A.S. Bransden, J.H.P.C. Megaw, P.H. Balkwill and C. Westcott, J. Mod. Opt. 37(1990)813.
T. Toriyama, K. Ueoka, T. Hashimoto, K. Histake and K. Kitayama, Hyp. Int. 69(1991)771.
N.N. Greenwood and A.T. Howe, J. Chem. Soc. Dalton Trans. 6(1972)110.
K. Sato and K. Adachi, J. Phys. Soc. Jpn. 26(1969)855.
H. Reuther, Nucl. Instr. Meth. B30(1988)61.
P. Schaaf, P. Bauer and U. Gonser, Hyp. Int. 46(1989)541.
M. Ron, Iron-carbon and iron-nitrogen systems, in:Applications of Mössbauer Spectroscopy II, ed. R.L. Cohen (Academic Press, New York, 1980) pp. 329–392.
D.H. Jack and K.H. Jack, Mater. Sci. Eng. 11(1973)1.
P. Bauer, O.N.C. Uwakweh and J.M.R. Génin, Hyp. Int. 41(1988)555.
G. Wagner, R. Leutenecker and U. Gonser, Hyp. Int. 56(1990)1653.
R. Poprawe, E. Beyer, L. Bakowsky, G. Brumme and G. Herziger, Limitation of laser processing intensity by laser induced gas breakdown, in:Proc. 6th Int. Congress LASER '89 (Springer, Berlin, 1983).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Schaaf, P., Emmel, A., Schubert, E. et al. Surface investigation of excimer laser irradiated phosphatized steel plates. Hyperfine Interact 92, 1361–1366 (1994). https://doi.org/10.1007/BF02065779
Issue Date:
DOI: https://doi.org/10.1007/BF02065779