Synthesis of the Composite Ultrafine Particles of Pd-TiN System by 'Reactive Plasma-Metal' Reaction

摘要

Ultrafine particles of Pd-TiN system have been synthesized by "reactive plasma-metal" reaction, i.e., arc melting, vaporization and deposition of a binary Pd-Ti alloy in an atmosphere of a nitrogen-hydrogen mixed gas. X-ray diffraction and transmission electron microscope measurements have been carried out for the resulting particles. It is found that the typical morphology of the resulting ultrafine particles is a dumbbell-like particle consisting of single phases of Pd and TiN particles with the particle sizes of approx 20nm and approx 50nm, respectively. In addition, the ultrafine particles, synthesized from the parent alloys containing more than 60at percent Ti, show solid solutions of Pd and TiN.