冷-热处理对Zr基块体非晶合金结构和性能的影响  

Effect of Cold-Heat Treatment on Structure and Properties of Zr-Based Bulk Amorphous Alloys

作　　者：王顺平 李春燕[1,2] 王海博 李金玲 李阳 寇生中[1,2] Wang Shunping;Li Chunyan;Wang Haibo;Li Jinling;Li Yang;Kou Shengzhong(State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals,Lanzhou University of Technology,Lanzhou 730050,China;School of Materials Science and Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[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,甘肃兰州730050 [2]兰州理工大学材料科学与工程学院,甘肃兰州730050

出　　处：《稀有金属材料与工程》2022年第5期1759-1766,共8页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(51861021,51661016,51971103,51571105)。

摘　　要：传统晶态材料构件或装备在低温环境中会出现可动部卡死、龟裂、特性改变甚至脆性断裂等现象。低温极端条件如温度突变、高应变速率冲击等对材料性能带来的不利影响严重制约了其在低温极端环境领域的应用。块体非晶合金在低温条件下具有强度更高塑性更好的特殊性能,在极地科考以及航空航天等极端条件下具有极大的应用优势。以(Zr_(0.6336)Cu_(0.1452)Ni_(0.1012)Al_(0.12))_(97)Tm_(3)块体非晶合金为研究对象,研究冷-热处理时间对块体非晶合金的结构、力学性能和耐腐蚀性能的影响。结果表明,当处理时间由30 min延长到90 min时,试样的晶化体积分数从2.3%增加到4.0%,抗压强度由1703 MPa增加到1805 MPa。在3.5%NaCl溶液中,合金具有较小的自腐蚀电流密度与较大的电化学阻抗,这意味着经冷-热处理后的块体非晶合金具有优异的耐腐蚀性能。本研究为块体非晶合金在低温极端环境领域的应用提供了强有力的理论支撑。In the cryogenic temperature environment,the movable parts of traditional crystalline components or equipment will be stuck and cracked,and characteristic change and even brittle fracture will occur.The influence of cryogenic extreme environment such as temperature mutation and high strain rate shocks on metallic glass severely restricts its application in industry.Due to special propert ies of higher strength and better plasticity at cryogenic temperature,bulk metallic glass has great application advantages in extr eme conditions such as polar scientific research and aerospace.A(Zr_(0.6336)Cu_(0.1452)Ni_(0.1012)Al_(0.12))_(97)Tm_(3) bulk metallic glass was chosen in this paper,and the effect of cold-heat treatment time on the microstructure,mechanical properties and electrochemica l corrosion resistance were studied.It is found that when the treatment time is set from 30 min to 90 min,the crystallization volume fraction of specimens increases f rom 2.3%to 4.0%,and the compressive strength increases from 1703 MPa to 1805 MPa.The smaller self-corrosion current density and larger electrochemical impedance in 3.5 wt%NaCl solution indicate that the bulk metallic glass has excellent corrosion resistance a fter cold-heat treatment.This study provides a strong theory support for the application of bulk metallic glasses in cryogenic temperature extreme environment fields.

关 键 词：块体非晶合金 冷-热处理 结构 力学性能 耐腐蚀性能 

分 类 号：TG139.8[一般工业技术—材料科学与工程]