Acoustic analysis of the amorphous phase of annealed Zr55Cu30Ni5Al10 glassy alloy, using diffracted SH ultrasonic waves

The effect of degree of amorphousness on electronic transport behaviors in the Ni–Nb–Zr–H glassy alloys with subnanometer-sized clusters

“…The structure of glassy alloys was identified by X-ray diffraction with Cu Kα radiation in the grazing incidence mode [4][5][6][13][14][15]. Using a diagnosis and analysis apparatus (USH-B, Toshiba Tungaloy, Japan) fitted with a transmitter/receiver set, the ultrasonic horizontally-shear (SH) wave pattern was analyzed in the pulse-diffraction mode with direct contact between the transducer and specimen [16]. The frequency was set to 1.6 MHz and naphthenic hydrogen oil with a viscosity of 400 Pa-s was used as the couplant [17].…”

“…The SH wave patterns revealed that the 10.5-, 31.4-and 104.7-m/s specimens contained 3, 2, and 1 types of structural colonies, respectively. A "colony" in the amorphous phase is defined as group of organized aggregations having the same composition [16]. The structural colony size was calculated using the formula Vs = f λ, where Vs, f, and λ are shear wave velocity (2121 m/s), frequency, and wavelength, respectively.…”

Band GAP Frequency Response in Regular Phononic Crystals

“…The second material was an Zr 55 Cu 30 Ni 5 Al 10 amorphous alloy. This type of alloys, due to their microstructure, are characterized by interesting phononic properties [27], although they are most often used in industry for their unique magnetic properties [28][29][30][31][32][33][34][35][36]. The whole structure is surrounded by air.…”