Transport Properties of Ni-Nb-Zr Glassy Alloys and Hydrogen Absorbed Alloys

• 作者: Hajime Yoshida Hiroshi Kawarada Jun Mizuno Mikiko Saito Mikio Fukuhara Rie Y. Umetsu Shin-ichi Yamaura Tetsushi Sekiguchi Toshio Sasaki
• 来源期刊: 金属学报(美国)
• 学科: 化学
• 关键词: Electrical RESISTIVITY AMORPHOUS Alloy RIBBON HYDROGEN ABSORPTION
• 年，卷（期）: 2013,（3）
• 页码范围: 45-49
• 页数: 5页
• 分类号: O6

摘要

The electrical transport properties of (Ni0.8Nb0.2)100-xZrx (x = 30, 40 and 50) amorphous ribbons and hydrogen charged specimens were investigated. The amorphous ribbons indicated a negative coefficient in the temperature dependence of their electrical resistivity as well as the typical transport properties of the amorphous alloys with comparatively high values of electrical resistivity, ρ. The normalized temperature coefficient of the resistivity (TCR ≡ 1/ρ300K·dρ/dT) tended to increase with increasing x in the temperature range of 100-300 K. These behaviors would suggest that the transport properties of the present amorphous ribbons were governed by temperature variation of the Debye-Waller factor, not by electron-phonon scattering. The hydrogen charged ribbons obtained by an electrochemical method also showed similar electrical resistivity behaviors as a function of the temperature. However, TCR of x = 40 with hydrogen charged ribbon, in which the amount of absorbed hydrogen was about 14 at%, increased about three times more than that of the pre-charged amorphous ribbon.