Diffusion between glass and metals for optical fiber preform extrusion

• Main Authors: Nair, Dileep Kumar Chakkathara Janardhanan, Zhang, Yilei, Yeo, Felicia Yan Xin, Zhang, Zhifeng
• Other Authors: Asundi, Anand K.
• Format: Conference or Workshop Item
• Language: English
• Published: 2018
• Subjects: Photoacoustic Tomography; Hybrid Imaging; DRNTU::Engineering::Chemical engineering
• Online Access: https://hdl.handle.net/10356/88484; http://hdl.handle.net/10220/46931
• Institution: Nanyang Technological University

When silica is extruded, diffusion of metal atoms into silica results contamination to the silica being heated, and thus is a serious concern for the glass extrusion process, such as extrusion of glass fiber preform. This paper examines diffusion between fused silica and two high strength metals, the stainless steel SS410 and the superalloy Inconel 718, at 1000 °C and under the normal atmosphere condition by SEM and Electron Dispersion Spectrum. It is found that diffusion occurs between silica and SS410, and at the same time, SS410 is severely oxidized during diffusion experiment. On the contrary, the diffusion between Inconel 718 and silica is unnoticeable, suggesting excellent high temperature performance of Inconel 718 for glass extrusion.