多组元替换Zr-Al-Ni-Cu-Ag金属玻璃的热稳定性和晶化行为  

Thermal Stability and Crystallization Behavior of Zr-Al-Ni-Cu-Ag Metallic Glasses with Multicomponent Replacement

作　　者：蒲永亮 钱翊齐 刘钰鑫 刘丛 丁静[3] 朱胜利[4,5] Pu Yongliang;Qian Yiqi;Liu Yuxin;Liu Cong;Ding Jing;Zhu Shengli(School of Materials Science and Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;School of Materials Science and Engineering,Hebei University of Technology,Tianjin 300130,China;School of Energy and Machinery,Dezhou University,Dezhou 253023,China;School of Materials Science and Engineering,Tianjin University,Tianjin 300350,China;Tianjin Key Laboratory of Composite and Functional Materials,Tianjin 300350,China)

机构地区：[1]兰州交通大学材料科学与工程学院,甘肃兰州730070 [2]河北工业大学材料科学与工程学院,天津300130 [3]德州学院能源与机械学院,山东德州253023 [4]天津大学材料科学与工程学院,天津300350 [5]天津市材料复合与功能化重点实验室,天津300350

出　　处：《稀有金属材料与工程》2024年第1期8-16,共9页Rare Metal Materials and Engineering

基　　金：Lanzhou Jiaotong University-Tianjin University Joint Innovation Foundation of China (2021051);Young Scholars Science Foundation of Lanzhou Jiaotong University (2019002)。

摘　　要：为提高金属玻璃的热稳定性并获得大过冷液相区,研究了成分为Zr_(65-x)(Al_(0.21)Ni_(0.29)Cu_(0.04)Ag_(0.46))_(35+x)(x=0,7.5,15.0,22.5)的金属玻璃,重点分析了组分浓度对合金热稳定性、热诱导沉淀相以及力学性能的影响。结果表明,随着合金组分浓度的增加,非晶漫散射峰的峰位向更高角度偏移,出现了玻璃转变现象。随着玻璃转变温度(T_(g))和晶化温度(T_(x))增加,液相线温度(Tl)降低,导致T_(x)和T_(g)之间的温度差(ΔT_(x))减小,约化玻璃转变温度(T_(rg))增大。此外,形核激活能(Ex)和长大激活能(E_(p1))随着溶质浓度的增加而增加。初晶从四方Zr_(2)Ni、Zr_(2)(Cu,Ag)、Zr Ag和六方Zr_(5)Al_(3)相的组合转变为单一四方ZrAg相,维氏硬度呈现出增加的趋势。通过研究,发现了具有141 K过冷液相区(ΔT_(x))和高热稳定性的新型金属玻璃Zr_(65-x)(Al_(0.21)Ni_(0.29)Cu_(0.04)Ag_(0.46))_(35+x)(x=7.5),且具有较强的抵抗晶化的特性。本研究采用的多组元替换策略对提高金属玻璃的热稳定性具有重要意义。In order to improve the thermal stability and to obtain a large supercooled liquid region of metal glasses,the Zr_(65−x)(Al_(0.21)Ni_(0.29)Cu_(0.04)Ag_(0.46))_(35+x)(x=0,7.5,15.0,22.5)metallic glasses were investigated.The effects of component concentrations on the thermal stability,heat-induced precipitate phases,and mechanical properties were analyzed.Results show that with increasing the component concentrations,the peak position of the broad diffraction pattern shifts towards higher angles,indicating the occurrence of glass transition phenomenon.With increasing the glass transition temperature(T_(g))and crystallization temperature(T_(x)),the liquidus temperature(Tl)is decreased,leading to decrease in the temperature difference(namely supercooled liquid region,ΔT_(x))between T_(x) and T_(g) and resulting in the increase in reduced glass transition range(T_(rg)).Additionally,the nucleation activation energy(Ex)and the growth activation energy(E_(p1))are increased with increasing the solute concentration.The primary crystal changes from the combination of tetragonal Zr_(2)Ni,Zr_(2)(Cu,Ag),ZrAg,and hexagonal Zr_(5)Al_(3) phases into the single tetragonal ZrAg phase.The Vickers hardness is also increased with increasing the solute concentration.In this research,a novel metallic glass,Zr_(65−x)(Al_(0.21)Ni_(0.29)Cu_(0.04)Ag_(0.46))_(35+x)(x=7.5),is developed,which presents a largeΔT_(x) of 141 K,high thermal stability,and strong crystallization resistance.This research adopting the multicomponent replacement strategy is of great significance to improve the thermal stability of metallic glasses.

关 键 词：金属玻璃 热稳定性 晶化行为 微观组织 维氏硬度 

分 类 号：TG139.8[一般工业技术—材料科学与工程]