Mechanical Spectroscopy Study of the Cu36Zr59Al5 and Cu54Zr40Al6 Amorphous Alloys

被引：2

作者：

Barbosa Marques, Paulo Wilmar ^{[1
]}

Chaves, Javier Munoz ^{[1
]}

da Silva, Paulo Sergio, Jr. ^{[1
]}

Florencio, Odila ^{[1
]}

Garcia, Maira Martins ^{[1
]}

Rodriguez Aliaga, Luis Cesar ^{[2
]}

Botta, Walter Jose ^{[2
]}

机构：

[1] Univ Fed Sao Carlos UFSCar, Dept Phys, Sao Carlos, SP, Brazil

[2] Univ Fed Sao Carlos UFSCar, Dept Mat Engn, Sao Carlos, SP, Brazil

来源：

MATERIALS RESEARCH-IBERO-AMERICAN JOURNAL OF MATERIALS | 2012年 / 15卷 / 06期

基金：

巴西圣保罗研究基金会;

关键词：

bulk metallic glasses; amorphous alloys; glass transition temperature; mechanical spectroscopy; internal friction; anelastic relaxation; GLASS-FORMING ABILITY; BULK METALLIC-GLASS; TOPOLOGICAL INSTABILITY; INTERNAL-FRICTION; RELAXATION; BEHAVIOR;

D O I：

10.1590/S1516-14392012005000138

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A mechanical spectroscopy study of Cu-Zr-Al bulk metallic glasses, was performed with two types of equipment: a Ke-type inverted torsion pendulum and an acoustic elastometer, working in the frequency ranges of Hz and kHz, respectively, with a heating rate of 1 K/min. The analysis of the anelastic relaxation shows similar spectra for both types of equipment resulting in internal friction patterns that vary with temperature and are not reproducible at each thermal cycle. The normalized of the square of the frequency changes from the first to later measurement cycles. These results indicate that the specimens of Cu-Zr-Al alloys were changing by mechanical relaxation, owing to the motion of atoms or clusters in the glassy state and possible "defects" produced during the processing of alloys.

引用

页码：1070 / 1074

页数：5

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