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
蒲永亮 1钱翊齐 1刘钰鑫 1刘丛 2丁静 3朱胜利4
作者信息
- 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;天津市材料复合与功能化重点实验室,天津 300350
- 折叠
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Zr65x(A10.21N10.29Cu0.04Ag0.46)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(Tg)和晶化温度(Tx)增加,液相线温度(T1)降低,导致T和Tg之间的温度差(△Tx)减小,约化玻璃转变温度(Trg)增大.此外,形核激活能(Ex)和长大激活能(Ep1)随着溶质浓度的增加而增加.初晶从四方Zr2Ni、Zr2(Cu,Ag)、ZrAg和六方Zr5Al3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(△Tx)和高热稳定性的新型金属玻璃Zr65-x(Al0.21Ni0.29Cu0.04Ag0.46)3x(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.
Abstract
In order to improve the thermal stability and to obtain a large supercooled liquid region of metal glasses,the Zr65-x(Al0.21Ni0.29Cu0.04Ag0.46)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(Tg)and crystallization temperature(Tx),the liquidus temperature(T)is decreased,leading to decrease in the temperature difference(namely supercooled liquid region,△Tx)between Tx and T and resulting in the increase in reduced glass transition range(Trg).Additionally,the nucleation activation energy(Ex)and the growth activation energy(Ep1)are increased with increasing the solute concentration.The primary crystal changes from the combination of tetragonal Zr2Ni,Zr2(Cu,Ag),ZrAg,and hexagonal Zr5Al3 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,Zr65-x(Al0.21Ni0.29-Cu0.04Ag0.46)35+x(x=7.5),is developed,which presents a large △Tx 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Key words
metallic glass/thermal stability/crystallization behavior/microstructure/Vickers hardness引用本文复制引用
基金项目
Lanzhou Jiaotong University-Tianjin University Joint Innovation Foundation of China(2021051)
Young Scholars Science Foundation of Lanzhou Jiaotong University(2019002)
出版年
2024
NETL
NSTL
万方数据