Sintering and reaction behavior in Ni-Ti powder mixtures

The present study focuses on in situ as well as ex situ studies on the sintering of pre-compacted powder mixtures of 50 at% Nickel-50 at %Titanium. In situ studies were carried out by monitoring the changes in morphology of the fracture surface of the compact continuously during heating in the hot stage of an environmental scanning electron microscope. Results on the initiation of sintering and its variation with the particle size of reactants are presented. Differential Scanning Calorimetry and X-ray diffraction studies have also been made to characterize the formation of intermetallic compounds during the progress of sintering