Research on bonding strength of ultra-thin glass in assembly of X-ray telescope

Shen Zhengxiang; Zhang Jing; Yu Jun; Wang Xiaoqiang; Wei Junjie; Long Huabao

doi:10.3788/IRLA201948.0218001

Epoxy is a key bond material in the mirror assembly of nested conical approximation Wolter-I type focusing telescope which is based on ultra-thin glass. The mechanical properties of the telescope is determined by the bonding strength of the adhesive layer with micron-scale thickness. The bonding strength of ultra-thin glasses-F131 epoxy -graphite bonding structure under different curing environments and surface roughness of graphite was studied. The results show that the bonding strength decreases with the increase of the curing humidity of epoxy and increases with the increase of the surface roughness of the graphite. The peel of the graphite was found to be the main type of failure in bonding structure by comparing the surface peeling area ratio of graphite. Finally, the B basis was introduced as an evaluation of bonding strength to improve the accuracy and reliability of the bonding properties for telescope assembly.

Research on bonding strength of ultra-thin glass in assembly of X-ray telescope

1. MOE Key Laboratory of Advanced Micro-Structured Materials,Tongji University,Shanghai 200092,China;

2. Institute of Precision Optical Engineering,School of Physics Science and Engineering,Tongji University,Shanghai 200092,China;

3. Shanghai Institute of Space Control Technology,Shanghai 201109,China

Received Date: 2018-09-10

Rev Recd Date: 2018-10-20

Publish Date: 2019-02-25

Key words:

Abstract: Epoxy is a key bond material in the mirror assembly of nested conical approximation Wolter-I type focusing telescope which is based on ultra-thin glass. The mechanical properties of the telescope is determined by the bonding strength of the adhesive layer with micron-scale thickness. The bonding strength of ultra-thin glasses-F131 epoxy -graphite bonding structure under different curing environments and surface roughness of graphite was studied. The results show that the bonding strength decreases with the increase of the curing humidity of epoxy and increases with the increase of the surface roughness of the graphite. The peel of the graphite was found to be the main type of failure in bonding structure by comparing the surface peeling area ratio of graphite. Finally, the B basis was introduced as an evaluation of bonding strength to improve the accuracy and reliability of the bonding properties for telescope assembly.

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Reference (18)

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Research on bonding strength of ultra-thin glass in assembly of X-ray telescope

doi: 10.3788/IRLA201948.0218001

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