Elastic properties and microstructure of metallic glasses Pd_(39)Ni_(10)Cu_(30)P_(21) studied by microacoustical technique

摘要

The elastic properties of Pd_(39)Ni_(10)Cu_(10)P_(21) bulk metallic glass (BMG) have been analysed using measurements of sound velocities.Different states of the Pd_(39)Ni_(10)Cu_(10)P_(21) system (glassy state,supercooled liquid (SCL) and polycrystalline state) were obtained by annealing the samples near the glass transition and crystallization onset temperature.The microacoustical technique has been applied to measure local values of longitudinal and transverse elastic wave velocities and their distribution over a specimen.