The Effect of Free Volume on the Crystallization of Al87Ni8Gd5 Amorphous Alloy

被引：21

作者：

Abrosimova, Galina ^{[1
]}

Chirkova, Valentina ^{[1
]}

Pershina, Elena ^{[1
]}

Volkov, Nikita ^{[1
]}

Sholin, Ilia ^{[1
]}

Aronin, Aleksandr ^{[1
]}

机构：

[1] RAS, Inst Solid State Phys, Chernogolovka 142432, Russia

来源：

METALS | 2022年 / 12卷 / 02期

关键词：

metallic glass; nanostructure; free volume; deformation; BULK METALLIC-GLASS; SHEAR BANDS; STRUCTURAL RELAXATION; NANOCRYSTALLIZATION; DEFORMATION; DECOMPOSITION; COMPRESSION; PHASE;

D O I：

10.3390/met12020332

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of free volume on the process of crystallization of an Al87Ni8Gd5 amorphous alloy is investigated. The deformation of the amorphous alloys leads to the formation of shear bands, which contain an enhanced free volume concentration. To retain the free volume the amorphous alloy was coated with a layer of a refractory metal. The structure of the Al87Ni8Gd5 alloy with a protective Ta coating was studied by X-ray diffraction and transmission electron microscopy methods. The fraction of the nanocrystalline phase formed in the amorphous samples with a protective Ta coating under annealing was found to be larger than that in the uncoated samples. The size of Al nanocrystals formed in the coated and uncoated samples is the same. A higher rate of crystal nucleation in the deformed amorphous samples with a protective coating is caused by a higher diffusion coefficient due to an enhanced free volume concentration.

引用

页数：10

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