Vacuum Strength of Two Candidate Glasses for a Space Observatory

The strengths of two‐candidate glass types for use in a space observatory were measured. Samples of ultra‐low expansion glass (ULE) and borosilicate (Pyrex) were tested in air and in vacuum at room temperature (20°C) and in vacuum after being heated to 200°C. Both glasses tested in vacuum showed a s...

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Bibliographic Details
Published in:Journal of the American Ceramic Society 2007-10, Vol.90 (10), p.3318-3319
Main Authors: Manning, Timothy Andrew, Tucker, Dennis S., Herren, Kenneth A., Gregory, Don A.
Format: Article
Language:English
Subjects:
Applied sciences
Borosilicate
Building materials. Ceramics. Glasses
Ceramics
Chemical industry and chemicals
Exact sciences and technology
Glass
Glasses
Heating
Observatories
Samples
Silica
Statistical analysis
Statistical methods
Strength
Structure, analysis, properties
Temperature
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Summary:The strengths of two‐candidate glass types for use in a space observatory were measured. Samples of ultra‐low expansion glass (ULE) and borosilicate (Pyrex) were tested in air and in vacuum at room temperature (20°C) and in vacuum after being heated to 200°C. Both glasses tested in vacuum showed a significant increase in strength over those tested in air. However, there was no statistical difference between the strength of samples tested in vacuum at room temperature and those tested in vacuum after heating to 200°C.
ISSN:0002-7820
1551-2916
DOI:10.1111/j.1551-2916.2007.01872.x