ACOUSTIC QUALITY FACTOR OF COPPER, BRASS AND BERYLLIUM COPPER FROM 50-MK TO 300-K

被引：11

作者：

DUFFY, W

机构：

[1] Department of Physics, Santa Clara University, Santa Clara

来源：

CRYOGENICS | 1992年 / 32卷 / 12期

基金：

美国国家科学基金会;

关键词：

MECHANICAL QUALITY FACTOR; INTERNAL FRICTION; GRAVITY WAVE DETECTORS;

D O I：

10.1016/0011-2275(92)90325-5

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The amplitude-independent background mechanical quality factors (reciprocal internal frictions) of oxygen-free electronic (OFE) copper (C1O1OO), free-turning brass (C36000) and beryllium copper (C17200) were measured in the temperature range 50 mK - 300 K. The data were obtained from measurements on 1 kHz torsional modes of mechanical resonators configured to minimize extraneous internal friction effects. The resonant frequency dependence on temperature was also obtained, giving the temperature dependence of the dynamic shear modulus. Strongly enhanced quality factors were obtained from appropriate heat treatment.

引用

页码：1121 / 1124

页数：4

共 13 条

[1] THE USE OF ALUMINUM-ALLOY 5056 FOR HIGH-Q MECHANICAL OSCILLATORS AT LOW-TEMPERATURES [J].