Crystallization kinetics of amorphous nanostructured Pd40.5Ni40.5P19 alloys

When a homogeneous amorphous Pd40.5Ni40.5P19 alloy was subjected to thermal annealing for 30 min at various temperatures, novel microstructures were o bserved. At an annealing temperature of 603 K, phase separation of the amor phous phase dominated. At 628 K, a precipitation reaction proceeded first. After its completion, a eutectic growth set in. At 638 K, metastable spinod al decomposition occurred first, followed by a eutectic growth. Finally at 673 K, crystal growth of crystalline spinodal network was fast enough to co mpete with a eutectic growth.