1 / 4

Initial Tests on Vacuum Thermogravimetric Apparatus (TGA) at Glenn Research Center Feb 2012

Initial Tests on Vacuum Thermogravimetric Apparatus (TGA) at Glenn Research Center Feb 2012. Sample. Macro-View of C-103 Coupon after Exposure to Vacuum at 1600C. Appears to show etching and grain boundary attack  Possible degradation in mechanical properties

idania
Télécharger la présentation

Initial Tests on Vacuum Thermogravimetric Apparatus (TGA) at Glenn Research Center Feb 2012

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Initial Tests on Vacuum Thermogravimetric Apparatus (TGA) at Glenn Research Center Feb 2012 Sample

  2. Macro-View of C-103 Coupon after Exposure to Vacuum at 1600C Appears to show etching and grain boundary attack  Possible degradation in mechanical properties Need to examine with electron microscope

  3. Comments on Further Studies • Pushing C-103 to extreme conditions • Initial weight gain on heat-up (condensed phase oxide?) • Then weight loss (vaporization and/or oxygen enhanced vaporization?) • Appears to be some type of vaporization/outgassing • Need to determine if related to oxygen—critical factor with refractory metals • Suggest further TGA tests with zirconia oxygen sensor • Possibly use oxygen getter in furnace • Suggest some mass spectrometer tests to identify vapor species • Post examination of samples with electron microscope • Information on mission parameters • Estimates of oxygen content in space? • How long at highest temperatures?

More Related