Glasslike elastic properties in the ω-β alloys
Glasslike elastic properties in the ω-β alloys
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ω-β 合金的玻璃状弹性特性
DOI：
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发表时间：
1994
期刊：
影响因子：
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通讯作者：
R. Pohl
中科院分区：
文献类型：
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作者：
J. Cleve;A. Raychaudhuri;R. Pohl
我们已经测量了几种多晶合金的内摩擦和声速，使用复合扭转振荡器，频率在60 kHz和100 kHz之间，温度在50 mK和100 K之间。通过将这些数据与现有的类似合金的弹性和热数据相结合，我们发现那些可以经历无扩散相变的合金，如Ti:Nb， Ti:V或Zr:Nb在一定的组成范围内具有玻璃样激发，因为它们具有弹性性质，其大小和温度依赖性与非晶固体一致。相比之下。结晶连续溶解型合金，如Nb:Ta，或具有扩散相变的合金，如高压淬火Al94Si6，具有与晶体相同的弹性性能。
We have measured the internal friction and speed of sound in several polycrystalline alloys, using compound torsional oscillators at frequencies between 60 kHz and 100 kHz and temperatures between 50 mK and 100 K. By combining these data with existing elastic and thermal data on similar alloys, we find that those alloys which can undergo diffusionsless phase transitions, such as Ti:Nb, Ti:V, or Zr:Nb in certain ranges of composition have glasslike excitations, since they have elastic properties which agree in magnitude and temperature dependence with those of amorphous solids. By contrast. crystalline continuous solution alloys, such as Nb:Ta, or alloys with diffusive phase transitions, such as high-pressure quenched Al94Si6, have the same elastic properties as are known for crystals.