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Optical Engineering

Inelastic effects in a thermoplastic adhesive used for bonding a diamond disk
Author(s): Cynthia G. Madras; Peter Y. Wong; Ioannis N. Miaoulis
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Paper Abstract

A 1-in.-diam polished diamond disk was bonded to a disk of zinc sulfide (ZnS) using a high-temperature thermoplastic adhesive to form an optical structure that may be used for infrared applications. A postbonding thermal-stress-induced deformation in the structure at room temperature was observed to decrease exponentially over time. This curvature decrease may be attributed to viscoelastic stress relaxation within the adhesive layer. The relaxation behavior of the adhesive layer was characterized over a range of temperatures above room temperature by observing curvature changes in the structure heated to these temperatures. This characterization has led to knowledge of the deformational behavior of this structure during manufacturing and service conditions. In addition, relaxation and approximate physical properties of the adhesive were extracted from the observed behavior.

Paper Details

Date Published: 1 August 1996
PDF: 7 pages
Opt. Eng. 35(8) doi: 10.1117/1.600790
Published in: Optical Engineering Volume 35, Issue 8
Show Author Affiliations
Cynthia G. Madras, Tufts Univ. (United States)
Peter Y. Wong, Tufts Univ. (United States)
Ioannis N. Miaoulis, Tufts Univ. (United States)

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