Interaction of Ytterbium Trifluoride with Zirconium in a NaF-ZrF4 Molten Mixture

Kompanichenko, N. M.; Savchuk, R. N.; Faidyuk, N. V.; Омельчук, А. А.; Зинченко, В. Ф.; Buryak, N. I.

doi:10.1134/s0036023608030133

Cited by 1 publication

(1 citation statement)

References 7 publications

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“…Nevertheless, when the sample is exposed to SO2 salt fog for 24hrs, the entire coating collapsed into flakers (Figure 4 (b)). Since SiO2 and Si are reported stable in the SO2 salt fog environments [16][17][18][19], three factors that bring to our attention are 1) Stability of ZnO in the SO2 salt fog environment, 2) Defects in the coating that may allow SO2 penetration, and 3) Coating stress. ZnO is chemically unstable when exposed to SO2 or H2SO4 as shown below:…”

Section: Sio2/si Coating Materials Systemmentioning

confidence: 99%

Corrosion resistance environment durable SWIR-MWIR AR coatings

Xu,

Bredberg,

Ballou

et al. 2023

Advanced Optics for Imaging Applications: UV Through LWIR VIII

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In recent years, applied optics has been pushed into two opposite directions, deep ultraviolet (DUV)/extreme ultraviolet (EUV) for semiconductors, and infrared (IR) for infrared optics. To increase resolution, coatings are critical for IR optics on various IR transparent substrates. Outer window coatings pose a huge challenge in meeting severe environmental conditions including corrosion resistance, mechanical durability, or even biological threats. In this research, AR antireflective (AR) coatings for short wavelength to mid-wavelength IR (SWIR-MWIR) applications on IR transparent substrates were developed through physical vapor deposition (PVD) processes. By careful materials selection and processes tunning, Corning has developed a coating that can pass durability tests in severe conditions including fluid, ozone, bacteria, and enhanced humidity exposure. The developed coating has successfully passed corrosion resistance of SO2 salt-fog test for 168 hrs (7days) and H2SO4+salt-fog solution test for 672 hrs (28days) without degradation optically and mechanically. Atomic force microscope (AFM) data show that the RMS roughness is greatly reduced after corrosion testing and the surface is smoother with less scatter centers, which is consistence with transmission improvement. Timeof-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) data confirms no degradation after SO2 salt fog corrosive testing for 168Hrs. The success of this super-durable coating development was dependent upon dense, low defect, stress balanced, and chemically inert selection of the material system of SiO2/Si.

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Section: Sio2/si Coating Materials Systemmentioning

confidence: 99%