Small particle erosion of coated and uncoated electro-optical materials

Rachel Waxman; W. Howard Poisl; Ibrahim Guven

doi:10.1117/12.2518525

13 May 2019 Small particle erosion of coated and uncoated electro-optical materials

Rachel Waxman, W. Howard Poisl, Ibrahim Guven

Proceedings Volume 10985, Window and Dome Technologies and Materials XVI; 109850A (2019) https://doi.org/10.1117/12.2518525
Event: SPIE Defense + Commercial Sensing, 2019, Baltimore, MD, United States

Abstract

In this study, effects of coating material and thickness on damage characteristics of an electro-optical material impacted by small particles have been investigated. Six distinct sample types were prepared: (1) multispectral zinc sulfide (MS-ZnS), (2) MS-ZnS with rain erosion protection (REP), (3) MS-ZnS with thin durable antireflection coating (DAR), (4) MS-ZnS with thick DAR, (5) MS-ZnS with REP and thin DAR, and (6) MS-ZnS with REP and thick DAR. The samples were subjected to impact by glass spheres of diameter ranging from 150 micrometers to 700 micrometers at velocities ranging from 40 m/s to 200 m/s. The impact events were captured using two high-speed cameras at a rate of 125,000 frames per second. Taking advantage of the transparency of the samples, one camera captured the impact events from a vantage point normal to the impacted plane, on the other side of the impacted face. The other camera captured the events from a side view. Using the synchronized footage from both cameras, impact sites were paired with the impacting spheres and their velocities were measured. Nearly two hundred impacts were analyzed. The analysis included optical and scanning electron microscopy. Through the characterization effort, impact pit diameter, lateral crack diameter, and radial cracks lengths were measured. When coatings were present, delamination and peeling of the coatings were quantified. The trends in damage morphologies as functions of impacting sphere diameter and inbound velocities were explored. Thresholds for lateral and radial cracking phenomena were identified. The measurements were compared against theoretical values from indentation theory.

Citation Download Citation

Rachel Waxman, W. Howard Poisl, and Ibrahim Guven "Small particle erosion of coated and uncoated electro-optical materials", Proc. SPIE 10985, Window and Dome Technologies and Materials XVI, 109850A (13 May 2019); https://doi.org/10.1117/12.2518525

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
13 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Coating

Scanning electron microscopy

Particles

Electro optics

Video

Glasses

Optical microscopy

Show All Keywords

Keywords/Phrases

Search In:

Publication Years