Microstructural evaluation of sputtered Ru–Pt multilayer anti-stick coatings for glass molding

Akhtar, Awais; WANG, Jianbiao; HE, Ruizheng; Wong, Evans Yi Chun; HUNG, Karl; Ruan, Haihui

doi:10.1016/j.matdes.2022.110898

Cited by 8 publications

(1 citation statement)

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“…In the PGM process, complex shapes, specifically micro–nano-structured components, can be fabricated with exceptional precision. Nevertheless, the PGM of ChG glass faces some obstacles, one of which is the ChG glass–mold interfacial adhesion. − ChG glasses will adhere or stick to the mold during PGM under the influence of high temperature, high pressing force, and long contact time. The interfacial adhesion consists of physical adhesion and chemical adhesion. , Because of the intimate contact between the softened viscoelastic ChG glass and molds, Van der Waals forces could cause significant physical adhesion.…”

Section: Introductionmentioning

confidence: 99%

Study of Interfacial Adhesion and Re–Ir Alloy Coating in Chalcogenide Glass Molding

Zhu

Zhou

et al. 2023

Langmuir

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Precision glass molding (PGM) has become an efficacious technique to fabricate high-precision optics. Chalcogenide (ChG) glass is increasingly used in thermal imaging, night vision, etc., because of its excellent infrared optical properties. Nevertheless, glass−mold interfacial adhesion has emerged as a pivotal issue within the PGM process. The interfacial adhesion during PGM has the potential to significantly undermine the performance of molded optics and reduce the longevity of molds. It is important to investigate interfacial adhesion behaviors in the PGM. In this study, the interfacial adhesion mechanism between ChG glass and the nickel−phosphorus (Ni−P) mold is analyzed using the cylindrical compression test. The effect of ChG glass internal stress on physical adhesion is investigated by finite element method (FEM) simulation. The spherical preform is proven to be capable of reducing the stress concentration and preventing physical adhesion. More importantly, a rhenium−iridium (Re−Ir) alloy coating is deposited on the Ni−P mold surface by ion sputtering to prevent atomic diffusion and resolve the problem of chemical adhesion. Finally, ChG glass microstructures with high accuracy are fabricated using the spherical ChG glass preform and the Re−Ircoated Ni−P mold by PGM.

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