摘要
为寻找Cu-Zr二元合金中具有较强非晶形成能力(GFA)的成分比和探索不同成分Cu-Zr二元合金的GFA与其力学性能的关系,采用单辊旋淬法制备了3种不同成分比的Cu-Zr二元合金试样。采用X射线衍射分析试样的物相、差示扫描量热法(DSC)测定试样的热力学参数、扫描电镜(SEM)观察试样的显微形貌、纳米压痕实验测定试样弹性模量及纳米硬度。结果表明:随着合金成分从深共晶点Cu_(61.8)Zr_(38.2)向共晶点Cu_(56)Zr_(44)再向非共晶点Cu_(50)Zr_(50)转变,试样的T_(rg)和ΔT_(x)都不同程度地减小,即其GFA和热稳定性逐渐减弱。3种试样均具有较高的弹性模量和纳米硬度,但其数值都随Trg和ΔT_(x)的减小而降低,即合金的GFA和热稳定性越强,对应试样的力学性能越好。
In order to find the Cu-Zr composition ratio which has the stronger glass forming ability (GFA) in the Cu-Zr binary alloy and explore the relationship between the GFA and mechanical properties of Cu-Zr binary alloys with different compositions,three kinds of Cu-Zr binary alloy samples with different composition ratios were produced by single-roller rapid quenching.The phase of the samples were measured by X-ray diffraction (XRD),the thermodynamic parameters of the samples were determined by differential scanning calorimetry (DSC),the micrographs were observed by scanning electron microscope (SEM),as well as the elastic modulus and nano-hardness of the samples were determined by nano-indentation test.The results show that with the variation of component of Cu-Zr binary alloy from the deep eutectic point Cu_(61.8)Zr_(38.2),eutectic point Cu_(56)Zr_(44) to the non-eutectic point Cu_(50)Zr_(50),the TrgandΔT_(x) of the samples reduce to different extents.In other words,the GFA and thermal stability gradually weaken.The three samples have higher elastic modulus and nano hardness,but their values decrease with the Trgand ΔT_(x) decreasing.That is,the stronger the GFA and thermal stability of the alloys,the better the mechanical properties of the samples.
作者
郑进
王枭
王远
李朝岚
ZHENG Jin;WANG Xiao;WANG Yuan;LI Chaolan(School of Machinery and Transaction,Southwest Forestry University,Kunming 650224,China)
出处
《热加工工艺》
北大核心
2021年第2期52-55,62,共5页
Hot Working Technology
基金
云南省农业基础研究联合专项基金项目(2018FG001-062)。
关键词
Cu-Zr
非晶合金
GFA
热稳定性
力学性能
Cu-Zr
amorphous alloy
GFA(glass forming ability)
thermal stability
mechanical properties
