单辊旋淬法制纳米晶铜铍合金及结构分析

Nano-crystalline beryllium-Coppery alloy prepared by melt-spin method and its structural analysis

采用单辊旋淬法制备出纳米晶CuBe合金,利用X射线衍射、扫描电镜以及电子能谱等分析方法对纳米晶铜铍合金进行结构分析,并与原始态的CuBe合金的相结构进行了对比。研究表明:合理的快速凝固工艺能使铜铍合金的晶粒尺寸达到30 nm左右,晶粒形貌发生变化,并且有类似CuBe的金属间化合物出现。由于铍原子加入到纯铜中,使得铜铍合金的固溶度扩大,在快速凝固铜合金中有大量细小弥散的第二相颗粒,有共析转变发生。

Nano-crystalline beryllium-Coppery BeCu alloy is prepared by the melt-spin method. It was characterized by X-ray diffraction, scanning electron microscope and electron spectroscopy, and its structure was compared with of the original state of the alloy CuBe. Result shows that., reasonable rapid solidification technology can decrease grain size of the CuBe alloy to 30 nm around, changing the grain morphology of the alloy; something like CuBe intermetallic compounds can be found. In Be-doped Cu, a large number of small dispersion of the second phase particles appear in the rapid solidification alloy the solid solubility of the alloy is eahanced, and eutectoid reaction happen.