塑性变形对Zr-Al-Ni-Cu-Ag非晶合金中二十面体准晶相析出的影响  

Influence of Rolling on the Precipitation of Icosahedral Quasicrystalline Phase in Zr-Al-Ni-Cu-Ag Amorphous Alloy

作　　者：党淑娥[1,2] 王祥辉[2] 廉培霞[2] 胡勇[2] 闫志杰[2] 梁伟[1] 张国庆[3] 

机构地区：[1]太原理工大学,山西太原030024 [2]太原科技大学,山西太原030024 [3]浙江理工大学,浙江杭州310018

出　　处：《稀有金属材料与工程》2008年第10期1800-1803,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50471016);山西省自然科学基金(20051032);山西省青年学术带头人基金(2004)资助

摘　　要：利用X射线衍射(XRD)和差示扫描量热法(DSC)研究了轧制对Zr65Al7.5Ni10Cu12.5Ag5非晶合金中二十面体准晶相析出的影响。实验发现,经轧制塑性变形合金在随后的加热过程中二十面体准晶相的析出量增加,在变形量ε=70%时达到最大。另外,析出的二十面体准晶相的稳定性随着变形量增大而提高,在ε=70%时达到最大,随后又开始降低。这是由于合金在塑性变形过程中的原子组态发生变化所致。Influence of rolling on the precipitation of icosahedral quasicrystalline phase （I-phase） in Zr65A17.5Ni10Cu12.5Ag5 amorphous alloy is investigated by X-ray diffraction （XRD） and differential scanning calorimetry （DSC）. The results show that more I-phase precipitate in the roiled alloys than that in the as-cast one, and that the amount becomes the maximum when the deformation degree ε reaches 70 %. Furthermore, the thermal stability of the I-phase increases with the deformation degree increasing. The thermal stability of I-phase shows the maximum at ε=70 %, but subsequently decreases. It is attributed to the change of atomic configuration in the alloy during plastic deformation.

关 键 词：非晶合金 塑性变形 二十面体准晶相 

分 类 号：TG139.8[一般工业技术—材料科学与工程]