Effect of Laser Power on the Microstructure of Ni-P Layer Deposited on Aluminum Substrate
Laser processing of Ni-P layer electroless deposited on aluminum substrate was carried out by Nd-YAG pulsed laser. Different laser processing parameters were selected. When lower laser power density was employed, the modified Ni-P layer was obtained, however, when employed laser power density increased, laser alloying of Ni-P layer with aluminum substrate occurred. The characteristic dendritic or lamellar microstructures were observed in the alloyed layer. The phase constituents of the alloyed zones determined by X-ray diffraction are consisted of nickel-aluminum intermetallic compounds NiAl, Al3Ni and Al3Ni2, as well as some non-equilibrium phases, depending on the employed laser power density.
Yafang Han, Fusheng Pan, Jianmao Tang, Chungen Zhou
Y. Yang and J. D. Hu, "Effect of Laser Power on the Microstructure of Ni-P Layer Deposited on Aluminum Substrate", Materials Science Forum, Vol. 686, pp. 539-545, 2011