非晶态Cu56Zr44合金的结构及其等温退火晶化过程的研究

利用X射线衍射技术、差示扫描量热分析技术和透射电子显微镜研究了非晶态Cu₅₆Zr₄₄合金的结构及其等温退火条件下的晶化过程.实验结果表明,非晶态Cu₅₆Zr₄₄合金在室温下的短程结构类似于硬球无规密堆积分布.在703K过冷液相区内等温退火时发现,当退火时间为3min时,晶化产物主要为Cu₈Zr₃相;当退火时间为6min时,Cu₈Zr₃关键词： 非晶态 56Zr₄₄合金')" href="#">Cu₅₆Zr₄₄合金 结构 等温退火

STUDY ON MICROSTRUCTURE AND CRYSTALLIZATION OF AMORPHOUS Cu56Zr44 ALLOY BY MEANS OF ISOTHERMAL ANNEALING

The microstructure and crystallization process of an amorphous Cu₅₆Zr₄₄ alloy at isothermal annealing were studied by using the X-ray diffraction, differential scanning calorimetry and transmission electron micrograph techniques. The experimental results seem to show that the short-range order of amorphous Cu₅₆Zr₄₄ alloy at room temperature is of hard sphere random dense packing. It is found that the crystallization products of amorphous Cu₅₆Zr₄₄ alloy annealed at 703K within its supercooled liquid range is mainly Cu₈Zr₃ phase in an annealing time of 3min, and when the time is 6min, Cu₈Zr₃ phase disappears completely and Cu₁₀Zr₇ phase precipitates a lot, while if the time is longer than 30min, several kinds of phases such as Cu₁₀Zr₇, CuZr₂ and Cu₈Zr₃ will form. Based on the above the diffusion mechanism of amorphous Cu₅₆Zr₄₄ alloy at isothermal annealing is presented.