Solid-State Diffusion Bonding of Glass-Metal for the International Thermonuclear Experimental Reactor (ITER) Diagnostic Windows

Aucott, Lee; Bamber, R.; Lunev, Artem; Darby, Tim; Maquet, P.; Gimbert, Nathalie; Pak, S.; Walsh, Mike; Udintsev, V. S.; Eaton, Glenn; Conway, Brendan

doi:10.1007/978-3-030-36296-6_191

Cited by 3 publications

(3 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Given the amorphous atomic structure of silica NPs, which restricts dislocation movement and renders the material brittle, 54 it can be inferred that the reorganisation of Fe-rich grains occurred through solid-state diffusion of Fe ions within the structure of silica NPs, thereby resulting in a reorganisation of the packing order of the NPs. The solid-state interdiffusion of Fe in silica NPs can be interpreted as a Kirkendall effect, 55 where Fe has a higher diffusion coefficient compared to Si NPs.…”

Section: Resultsmentioning

confidence: 99%

Non-destructive 3D exploration of silicate glass corrosion: a combined multiscale approach from the macro to the nanoscale

Franceschin,

Zanini,

Iori

et al. 2024

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 99%

Non-destructive 3D exploration of silicate glass corrosion: a combined multiscale approach from the macro to the nanoscale

Franceschin,

Zanini,

Iori

et al. 2024

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…Diffusion welding (a joining process by heat and pressure where the contact surfaces are joined by diffusion of atoms) (DFW)—either Al or Au—is considered the gold standard technique for the assembly of ITER windows [ 115 ]. Initially, candidate materials for the windows were fused silica, synthetic crystalline quartz and barium fluoride, among others [ 107 ].…”

Section: Diagnostic Materialsmentioning

confidence: 99%

Materials to Be Used in Future Magnetic Confinement Fusion Reactors: A Review

Alba¹,

Rodríguez²,

Cerdeira³

2022

Materials

View full text Add to dashboard Cite

This paper presents the roadmap of the main materials to be used for ITER and DEMO class reactors as well as an overview of the most relevant innovations that have been made in recent years. The main idea in the EUROfusion development program for the FW (first wall) is the use of low-activation materials. Thus far, several candidates have been proposed: RAFM and ODS steels, SiC/SiC ceramic composites and vanadium alloys. In turn, the most relevant diagnostic systems and PFMs (plasma-facing materials) will be described, all accompanied by the corresponding justification for the selection of the materials as well as their main characteristics. Finally, an outlook will be provided on future material development activities to be carried out during the next phase of the conceptual design for DEMO, which is highly dependent on the success of the IFMIF-DONES facility, whose design, operation and objectives are also described in this paper.

show abstract

“…Diffusion bonding can obtain sound joints between dissimilar materials, mainly when interlayers are applied to join the faying diffusion surfaces. In this case, cracks due to residual stress can be prevented [10,17,[31][32][33][34][35][36][37][38]. Active elements have been used as interlayers, e.g., titanium, niobium, and zirconium [15,16].…”

Section: Introductionmentioning

confidence: 99%

Joining Ti6Al4V to Alumina by Diffusion Bonding Using Titanium Interlayers

Silva

Ramos

Simões

2021

Metals

View full text Add to dashboard Cite

This work aims to investigate the joining of Ti6Al4V alloy to alumina by diffusion bonding using titanium interlayers: thin films (1 µm) and commercial titanium foils (5 µm). The Ti thin films were deposited by magnetron sputtering onto alumina. The joints were processed at 900, 950, and 1000 °C, dwell time of 10 and 60 min, under contact pressure. Experiments without interlayer were performed for comparison purposes. Microstructural characterization of the interfaces was conducted by optical microscopy (OM), scanning electron microscopy (SEM) with energy dispersive X-ray spectroscopy (EDS), and electron backscatter diffraction (EBSD). The mechanical characterization of the joints was performed by nanoindentation to obtain hardness and reduced Young’s modulus distribution maps and shear strength tests. Joints processed without interlayer have only been achieved at 1000 °C. Conversely, joints processed using Ti thin films as interlayer showed promising results at temperatures of 950 °C for 60 min and 1000 °C for 10 and 60 min, under low pressure. The Ti adhesion to the alumina is a critical aspect of the diffusion bonding process and the joints produced with Ti freestanding foils were unsuccessful. The nanoindentation results revealed that the interfaces show hardness and reduced Young modulus, which reflect the observed microstructure. The average shear strength values are similar for all joints tested (52 ± 14 MPa for the joint processed without interlayer and 49 ± 25 MPa for the joint processed with interlayer), which confirms that the use of the Ti thin film improves the diffusion bonding of the Ti6Al4V alloy to alumina, enabling a decrease in the joining temperature and time.

show abstract

Solid-State Diffusion Bonding of Glass-Metal for the International Thermonuclear Experimental Reactor (ITER) Diagnostic Windows

Cited by 3 publications

References 5 publications

Non-destructive 3D exploration of silicate glass corrosion: a combined multiscale approach from the macro to the nanoscale

Non-destructive 3D exploration of silicate glass corrosion: a combined multiscale approach from the macro to the nanoscale

Materials to Be Used in Future Magnetic Confinement Fusion Reactors: A Review

Joining Ti6Al4V to Alumina by Diffusion Bonding Using Titanium Interlayers

Contact Info

Product

Resources

About