On the Surface Hardening of Zinc Sulfide Windows by Gallium Sulfide.

Materials (Basel)

CREOL, The College of Optics and Photonics, University of Central Florida, 4304 Scorpius St., Orlando, FL 32816, USA.

Published: November 2024

AI Article Synopsis

  • * Using secondary ion mass spectrometry, the research found that gallium penetrates several tens of microns into the material without causing significant changes in structure, as indicated by X-ray diffraction.
  • * The results show that increasing gallium concentration leads to a substantial increase in surface hardness, achieving values more than double those of the untreated ZnS, with plans for future work to optimize this treatment for improved durability in harsh conditions.

Article Abstract

This study examines the effect of gallium doping on the phase transformation, transmission, and hardness of commercial multispectral-grade ZnS specimens exposed to GaS vapor. Using secondary ion mass spectrometry, we show that Ga diffusion extends into the subsurface down to several tens of microns. X-ray diffraction patterns reveal minimal to no precipitation of wurtzite, resulting in limited infrared transmission loss after treatment. We report a monotonic increase in Vickers surface microhardness with increasing Ga concentration, reaching values more than double those of untreated windows. Future work will focus on optimizing this process and evaluating its effectiveness in enhancing the durability of ZnS windows under harsh environmental conditions.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11595366PMC
http://dx.doi.org/10.3390/ma17225622DOI Listing

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