Internal friction in lotus-structured porous copper with hydrogen pores
Internal friction in lotus-structured porous copper with hydrogen pores
复制标题
含氢孔莲花结构多孔铜的内摩擦
DOI：
10.1016/s0921-5093(02)00234-4
复制
发表时间：
2003
期刊：
影响因子：
6.4
通讯作者：
H. Nakajima
中科院分区：
文献类型：
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作者：
K. Ota;K. Ohashi;H. Nakajima
在氢气和氩气的混合气体中，通过熔体的单向凝固制备了长圆柱形孔沿一个方向排列的多孔铜。在真空气氛中，用受迫扭振技术在0.1 ~ 2 Hz频率范围内测量了1173 K以下的内耗。一个非常大的弛豫型峰，这是约0.1的Q倒数，观察到在700 K左右的加热和冷却。在1173 K真空退火43.2ks后，直到1173 K才检测到弛豫峰。峰的消失可能是由于氢从多孔铜中解吸。因此，可以得出结论，大的内耗峰归因于多孔铜中的氢。
Porous copper whose long cylindrical pores are aligned in one direction has been fabricated by unidirectional solidification of the melt in a pressurized mixture gas of hydrogen and argon. Internal friction has been measured by a forced torsional vibration technique in the frequency range of 0.1–2 Hz in vacuum atmosphere in the temperature range up to 1173 K. A very large relaxation type peak, which is about 0.1 as Q inverse, was observed at around 700 K on heating and on cooling. After annealing in vacuum at 1173 K for 43.2 ks the relaxation peak was not detected up to 1173 K. The disappearance of the peak may be due to desorption of hydrogen from the porous copper. Thus, it is concluded that the large internal friction peak is attributed to hydrogen in the porous copper.
大阪大学产业科学研究所
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