Formation of Metastable Disordered Ni3Al by Pulsed Laser-Induced Rapid Solidification
Citation
West, Jeffrey A.,James T. Manos, and Michael J. Aziz. 1991. Formation of metastable disordered Ni3Al by pulsed laser-induced rapid solidification. Materials Research Society Symposia Proceedings 213: 859-864.Abstract
Thin films of Ni3 formed by co-evaporation onto insulating substrates form single phase fcc disordered lattice upon rapid solidification following excimer laser-induced melting with an interface velocity of ~4 m/s. Transmission Electron Microscopy (TEM) and x-ray diffraction (XRD) analyses exhibit no superlattice diffraction at room temperature. Resistivity measurements, indicating that the disordered phase has a higher resistivity and much smaller temperature coefficient at room temperature than the stable ordered (L12) phase, permit us to monitor phase changes and ordering on a fast time-scale. Subsequent annealing recovers long-range order, with resistivity measurements indicating that reordering begins just below 300 degrees C.Terms of Use
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