(1. 兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室，兰州 730050；
2. 兰州理工大学 材料科学与工程学院，兰州 730050)
摘 要: 采用X射线衍射分析仪(XRD)、差示扫描量热仪(DSC)、万能力学试验机、扫描电子显微镜(SEM)及电化学工作站等研究退火以及深冷循环处理对Zr基块体非晶结构和性能的影响。结果表明：经玻璃转变温度Tg及以下温度退火处理后的试样呈非晶态。随着退火时间的延长，合金试样热稳定性减弱、耐腐蚀性逐渐增强、压缩塑性呈现先增强后减弱趋势，在500 K(0.6Tg)保温30 min时塑性应变εp达16.44%。退火态(0.6Tg，保温30 min)合金试样经深冷循环处理后仍呈非晶态。随着循环次数的增加，合金试样热稳定性增强、耐腐蚀性逐渐增强、压缩塑性逐渐优化，当循环90次时塑性应变εp达19.05%。综上所述可知，适当的退火处理工艺与深冷循环处理可以有效地提升Zr基块体非晶合金性能。
关键字: Zr基块体非晶合金；退火处理；深冷循环处理；原子结构；力学性能
（1. State Key Laboratory of Advanced Processing and Reuse of Nonferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;
2. School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, China）
Abstract:The effects of annealing and cryogenic thermal cycles on the structure and properties of Zr-based bulk amorphous alloys were studied by X-ray diffraction (XRD) and differential scanning calorimeter (DSC), universal mechanical testing machine, scanning electron microscope (SEM) and electrochemical workstation. The results show that the structures of samples after annealed at glass transition temperature (Tg) and below Tg are all amorphous. With the increase of annealing time, the thermal stability of the alloy decreases, the corrosion resistance gradually increases, and the mechanical properties increase first and then decrease. The plastic strain εp reaches 16.44% at 500 K (0.6Tg) for 30 min. The annealed alloy (0.6Tg, holding for 30 min) is still amorphous after cryogenic cycle treatment. With the increase of cycle times, the thermal stability, corrosion resistance and mechanical properties of the alloy samples are improved gradually. The plastic strain εp reaches 19.05% after 90 cycles. Generally speaking, proper annealing process and cryogenic cycle treatment conditions can be used as effective methods to improve the properties of the alloy.
Key words: Zr based bulk amorphous alloy; annealing treatment; cryogenic cycling treatment; atomic structure; mechanical property
