Layer-by-layer laser synthesis of Cu-Al-Ni intermetallic compounds and shape memory effect

摘要

We have studied conditions for the synthesis of intermetallic phases in the Cu-Al-Ni system by selective laser sintering/melting, in particular by heating a powder mixture to 300A degrees C. The effects of laser synthesis and heating on the microstructure of the intermetallic phases in the samples obtained have been studied using electron microscopy, optical metallography, and X-ray diffraction analysis. The results demonstrate high sinterability of stoichiometric mixtures. Resistivity measurements indicate that the samples exhibit a shape memory effect. We discuss the feasibility of producing biomicroelectromechanical systems using layerby- layer synthesis.