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Acoustic characteristics of Ni–Nb–Zr–H glassy alloys by ultrasonic shear waves
Author(s) -
Fukuhara Mikio,
Kawashima Asahi,
Yamaura Shinichi,
Inoue Akihisa
Publication year - 2007
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200600023
Subject(s) - hydrogen , shear waves , materials science , shear (geology) , ultrasonic sensor , elasticity (physics) , phase (matter) , analytical chemistry (journal) , condensed matter physics , mineralogy , crystallography , chemistry , composite material , physics , acoustics , organic chemistry
The propagation characteristics of shear horizontally polarized (SH) waves passing through (Ni 42 Nb 28 Zr 30 ) 100– x H x ( x = 0–15.2) glassy alloys were investigated as a function of hydrogen content. With an increase in hydrogen content, the propagation time and main frequency of the receiving waves show increase and decrease, respectively, indicating expan‐ sion in average atomic distance which comes from solution of hydrogen. In sharp contrast to crystalline alloys, the decrease in damping ratio and the delay in phase with increasing hydrogen suggest a strong settlement of hydrogen into four‐coordination sites surrounded tetrahedrally by four Zr atoms and the resulting increase in dynamic elasticity, respectively. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)