Ar¹²⁺Induced Irradiation Damage in Bulk Metallic Glass (Cu₄₇Zr₄₅Al₈)_98.5Y_1.5

Abstract

The highly charged ion Ar 12+ with an energy of 3 MeV is used for irradiating metallic glass (Cu47Zr45Al8)98.5Y1.5 and polycrystalline metallic W at the irradiation fluences of 1 × 10 14 ions/cm 2 , 1 × 10 15 ions/cm 2 and 1 × 10 16 ions/cm 2 . The main structure of metallic glass remains an amorphous phase under different irradiation fluences according to x-ray diffraction analysis. The scanning electron microscope observation on the morphologies indicates that no significant irradiation damage occurs on the surface and cross section of the metallic glass sample after different fluences of irradiation, while a large area of irregular cracks and holes were observed on the surface of metallic W at a fluence of 1 × 10 16 ions/cm 2 , with cracks and channel impairments at a certain depth from the surface. The root-mean-square (rms) roughness of metallic glass increases with increasing fluence of Ar 12+ , while the reflectance decreases with increasing irradiation fluence. A nano-hardness test shows that the hardness of metallic glass decreases after irradiation. Under certain conditions, metallic glass (Cu47Zr45Al8)98.5Y1.5 exhibits a higher capability of resistance to Ar 12+ irradiation in comparison with polycrystalline W.

Enhancing the crystallisation of insulin using amino acids as soft-templates to control nucleation

“…The interplay of these effects results in a significantly faster crystallisation and reduces the necessary bulk-supersaturation needed to form nuclei (15,17,18). Heterogeneous nucleants include mineral surfaces (19), membranes (20), polymers (21), DNA-origami (22), nano-and mesoporous particles (23,24), porous surfaces (25,26), and surfaces with selected functional groups (4,17,25,27). Selective nucleants that have an engineering surface topography and morphology, such as molecular imprinted silica surfaces or polymers, have the ability to selectively crystallise proteins due to favourable geometrical and physico-chemical interaction between the protein and the nucleant's surface (4,15,18,28,29).…”

“…Additives are soft organic molecules that fully dissolve in solution whereas heterogeneous nucleants are soft organic molecules which provide a soft heterogeneous surface for nucleation (e.g. pores of a DNA origami tube).Thus far, dissolved organic polymers (30, 31) and 3-dimensional DNA foldamers (22) have been shown to facilitate nucleation. Here, we would like to introduce natural amino acids as novel soft templates.…”

Effect of sintering temperature on luminescence properties of borosilicate matrix blue–green emitting color conversion glass ceramics*

“…[26][27][28] At home and abroad, lots of works of color conversion glass ceramics for white LEDs had been done. [29][30][31][32] At present, the glass mate-rial used in the color conversion glass ceramic research mainly include: bismuthate glass matrix material, [33] tellurate glass matrix material, [34] and borosilicate glass matrix material. [35] Compared to the other two glass matrix material, the borosilicate glass matrix material has two main advantages: (i) The borosilicate glass matrix material has a good thermal stability and prevents the phosphor from failing under high temperature and high humidity, (ii) The borosilicate glass matrix material is relatively stable, which can realize the glass ceramics with multi-wavelength phosphor doping.…”

Damage Characteristics of Zr-Based Metallic Glasses under Helium Ions Irradiation

“…MGs are potential candidates for applications in irradiation environments due to their inherent disordered structure [2]. The appearance of bulk metallic glasses (BMGs) have vastly increased their usefulness for structural applications [3][4][5][6] and created a renewed interest in these materials for nuclear applications [7][8][9][10][11]. A deuterium-tritium fusion reaction produces helium ions [12] with high energies and the helium ion bombardment of target materials can lead to damages, such as bubbling, peeling, flaking, and delamination at the peak zone of helium concentration under the surface layer.…”