Resistance to H+ induced irradiation damage in metallic glass Fe80Si7.43B12.57

Applied Surface Science

et al. 2016

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a b s t r a c tMetallic glass Ta 38 Ni 62 strips, metallic W, and V 87.5 Cr 4.17 Ti 4.17 Nb 4.17 alloy were irradiated using a 500 keV He 2+ ion beam at different fluence to compare the metallic glass resistance to irradiation. Metallic glass Ta 38 Ni 62 remained amorphous at different He 2+ irradiation fluence. Transmission electron microscopy analysis revealed the presence of helium bubbles at the end of the range of helium ions in the metallic glass. No significant damage resulted in the metallic glass surface, and the root mean square roughness increased nonlinearly with the increase in fluence. At 1 × 10 18 ions/cm 2 , metallic W appeared in larger sunken areas on the surface and V 87.5 Cr 4.17 Ti 4.17 Nb 4.17 alloy experienced multi-layer flaking. The metallic glass Ta 38 Ni 62 resistance to He 2+ ion beam irradiation was better than that of metallic W, and that of the V 87.5 Cr 4.17 Ti 4.17 Nb 4.17 alloy was the poorest.

Section: Discussionsupporting

confidence: 63%

Resistance to He2+ irradiation damage in metallic glass Ta38Ni62

Hou

Mei

Applied Surface Science

et al. 2016

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“…The damage and mobility that irradiation induces have many parallels with the effects of mechanical deformation. Metallic glasses appear to be immune from the unlimited void swelling observed in some crystalline alloys 118 , which suggests their suitability for nuclear applications 119,120 . Irradiation can induce relaxation or rejuvenation, depending on the initial state of the glass and on the irradiation conditions (BOX 2).…”

Section: Alternatives To Mechanical Processingmentioning

confidence: 99%

Thermomechanical processing of metallic glasses: extending the range of the glassy state

2016

| For crystalline metals the science, technology, and application of thermomechanical processing are established, but this is not true for glasses. Metallic glasses-because they can be plastically deformed-offer a unique opportunity to study the effects of thermomechanical treatments on the structure and properties of glasses. Depending on the rate of cooling, various glassy states can form from a liquid. Slower cooling gives states of lower enthalpy and smaller volume; such states might also be reached by annealing, which induces structural 'relaxation'. A reduction in the degree of relaxation, or 'rejuvenation', is achievable through processes such as irradiation and mechanical deformation. In this Review, we explore the extent of

“…12 In ref. [24], under the 250-keV H + irradiation of Fe80Si7.43B12.57 at the same fluence, different depths from the surface were kept in an amorphous state. The beam current with the energy of 40 keV (~5 mA) was found to be hundreds of times higher than the one with 250 keV (~10 A), and hence the damage cascade was more serious when the energy of the beam current was 40 keV.…”

Section: Effect Of Phase Structure With H + Irradiation In Metallic Gmentioning

confidence: 99%

H+-induced irradiation damage resistance in Fe- and Ni-based metallic glass

Mei

Nuclear Instruments and Methods in Physics Research Section B:

et al. 2016

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In this study, use of 40-keV H + ion for irradiating metallic glass Fe80Si7.43B12.57 and Ni62Ta38 as well as metallic tungsten (W) at fluences of 1 × 10 18 and 3 × 10 18 ions/cm 2 , respectively, was investigated. At the fluence of 1 × 10 18 ions/cm 2 , a crystalline layer appeared in metallic glass Fe80Si7.43B12.57, with -Fe as the major crystalline phase, coupled with a little Fe2B, Fe3B, and metastable β-Mn-type phase. Fe80Si7.43B12.57 exhibited good soft magnetic properties after irradiation. At the fluence of 3 × 10 18 ions/cm 2 , Ni62Ta38 was found to be amorphous-based, with a little -NiTa and Ni3Ta phases. No significant irradiation damage phenomenon appeared in metallic glasses Fe80Si7.43B12.57 and Ni62Ta38. Blistering, flaking, and other damage occurred on the surface of metallic W, and the root-mean-square (RMS) roughness increased with the increase of fluence. Metallic glass Ni62Ta38 exhibited better resistance to H + irradiation than Fe80Si7.43B12.57, both of which were superior to the metallic W.