A new Zr-(Fe, Cu) phase was found in furnace-cooled Zr-1.0Sn-0.3Nb-0.3Fe- 0.1Cu alloy and alloys aged at 580 °C for 10min, 2 h and 10 h. Electron diffraction experiment shows the crystal structure of this phase to be body-centered tetragonal with unit cell dimensions determined to be a = b = 6.49 Å, c = 5.37 Å. Its possible space groups have been discussed and the reason accounting for its formation is believed to be the addition of Cu according to the atom-level images. In addition, no crystal structural or chemical composition changes were observed throughout the aging process.

中文翻译：

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炉冷Zr-1.0Sn-0.3Nb-0.3Fe-0.1Cu合金中新型Zr-（Fe，Cu）相的TEM研究

在炉冷的Zr-1.0Sn-0.3Nb-0.3Fe-0.1Cu合金和在580°C时效10min，2 h和10 h的合金中发现了一种新的Zr-（Fe，Cu）相。电子衍射实验表明，该相的晶体结构为体心四边形，单位晶胞尺寸确定为a = b = 6.49Å，c = 5.37Å。已经讨论了其可能的空间群，并且据认为其形成的原因是根据原子级图像添加的Cu。另外，在整个时效过程中没有观察到晶体结构或化学组成的变化。