Skip to main content Accessibility help
×
Home

Laser alloying of Cu and Cr

  • J.F.M. Westendorp (a1), W. Koelewijn (a1), W.G.J.H.M. van Sark (a1), F.W. Saris (a1), N.M. van der Pers (a2) and Th.H. de Keijser (a2)...

Abstract

CuCr multilayers, 0.5−1 /um total thickness, on Cu substrates have been laser irradiated. Threshold energy densities for complete alloying with different laser wavelengths and different multilayer structures were determined using Rutherford backscattering. Results are discussed in terms of absorbance of Cu and Cr as a function of laser wavelength, overall chemical composition, and thicknesses of the individual Cu and Cr layers. Also, x-ray diffraction was used to study the microstructure of the CuCr before and after laser irradiation. A method is outlined for unraveling the contributions to peak shift of stacking faults, stresses, and change in'chemical composition. The CuCr alloy produced by the laser irradiation consisted of small, very defective Cu-rich and Cr-rich crystallites. The CuCr layer was subjected to a high tensile stress. The distinct change in preferred orientation of crystallites on laser irradiation indicated a complete melting of the CuCr multilayer. A high tensile strength (> 935 MPa) of the CuCr before and after laser alloying is suggested by the microstructure as observed by x-ray diffraction and sustained by hardness measurements. In the Cu-rich crystals 4.0 at. % Cr was in solid solution, i.e., five times the maximum equilibrium solid solubility.

Copyright

References

Hide All
1Hansen, M., Constitution of Binary Alloys (McGraw-Hill, New York, 1958), 2nd ed.
2Hamman, J. F., Siemens Forsch. Entwicklungsber. 9, 210 (1980).
3Falkenhagen, G. and Hofmann, W., Z. Metallkd. 43, 69 (1952).
4Dirks, A. G. and Broek, J. J. van den, in the Proceedings of the 12th International Conference on Metallurgical Coatings, Los Angeles, April 1985 (to be published).
5Draper, C. W., Jacobson, D. C., Gibson, J. M., Poate, J. M., Vandenberg, J. M., and Cullis, A. G., in Laser and Electron Beam Interactions with Solids, edited by Appleton, B. R. and Cellar, G. K. (North-Holland, New York, 1982), p. 413.
6Ehrenreich, H. and Philipp, H. R., Phys. Rev. 128, 1622 (1962).
7Rimini, E., in Surface Modification and Alloying by Laser, Ion and Electron Beams, edited by Poate, J. M., Foti, G., and Jacobson, D. C. (Plenum, New York, 1983), Chap. 2.
8Draper, C. W. and Poate, J. M., in Ref. 7, Chap. 13.
9Cullis, A. G., Webber, H. C., and Bailey, P., J. Phys. E12, 688 (1979).
10Delhez, R., Mittemeijer, E. J., Keijser, Th. H. de, and Rozendaal, H. C. F., J. Phys. E 10, 784 (1977).
11Delhez, R. and Mittemeijer, E. J., J. Appl. Crystallogr. 8, 609 (1975).
12Cohen, J. B., Dölle, H., and James, M. R., in National Bureau of Standards Special Publication 567, edited by Block, S. and Hubbard, C. R. (National Burea of Standards, Washington, DC, 1980), pp. 453477.
13Hauk, V. M. and Macherauch, E., Adv. X-Ray Anal. 27, 81 (1983).
14Warren, B. E., X-ray Diffraction (Addison-Wesley, Reading, MA 1969).
15Wagner, C. N. J. in Local Atomic Arrangements Studied by X-ray Diffraction, edited by Cohen, J. B. and Hilliard, J. E. (Addison-Wesley, Reading, MA, 1966).
16Johnson, P. B. and Christy, R. W., Phys. Rev. B 6, 4370 (1972).
17Johnson, P. B. and Christy, R. W., Phys. Rev. B 9, 5056 (1974).
18Delhez, R., Keijser, Th. H. de, and Mittemeijer, E. J., Fresenius Z. Anal. Chemie. 312, 1 (1982).
19Bollenrath, F., Hauk, V., and Müller, E. H., Z. Metallkd. 58, 76 (1967).
20Metals Handbook, Properties and Selection: Nonferrous Alloys and Pure Metals (American Society for Metals, Metals Park, OH, 1979), Vol. 2.

Laser alloying of Cu and Cr

  • J.F.M. Westendorp (a1), W. Koelewijn (a1), W.G.J.H.M. van Sark (a1), F.W. Saris (a1), N.M. van der Pers (a2) and Th.H. de Keijser (a2)...

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed