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H2 Blister formation on metallic surfaces - a candidate for fegradation processes in space

Sznajder, Maciej and Geppert, Ulrich (2016) H2 Blister formation on metallic surfaces - a candidate for fegradation processes in space. In: Advances in Solar Sailing. Springer. Third International Symposium on Solar Sailing, Glasgow, UK. ISBN 978-3-642-34906-5

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Official URL: http://www.springer.com/us/book/9783642349065

Abstract

H2-blisters are metal bubbles filled with hydrogen molecular gas resulting from recombination processes of protons in metal lattice. Bubble formation depends on many physical parameters, for instance: proton energy, proton flux, or the temperature of an exposed sample. Up to now no metallic sample that has been exposed to conditions prevalent in the interplanetary medium has been returned to Earth. Therefore, a direct evidence that blistering appears in space is missing. However, blistering is certainly a candidate of degradation processes which may occur in space. It could play an important role in the solar sail technology, where the performance of the sail is significantly affected by both the sail geometry but especially by optical properties of sail materials. Thus, both theoretical and laboratory studies of the blistering process have to be performed. The here presented model simulates the growth of molecular hydrogen bubbles on metallic surfaces. Additionally, it calculates the decrease of reflectivity of the by blistering degraded foils. First theoretical results show that the reflectivity of an Aluminum foil decreases by about 27% for a bubble surface density of 1500 cm-2 and an average bubble radius of 100 μm. Therefore, if blistering occurs, the propulsion performance of any sail-craft will be decreased by a significant factor.

Item URL in elib:https://elib.dlr.de/107656/
Document Type:Conference or Workshop Item (Speech)
Title:H2 Blister formation on metallic surfaces - a candidate for fegradation processes in space
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Sznajder, Maciejmaciej.sznajder (at) dlr.deUNSPECIFIED
Geppert, Ulrichulrich.geppert (at) dlr.deUNSPECIFIED
Date:16 November 2016
Journal or Publication Title:Advances in Solar Sailing
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Editors:
EditorsEmail
Macdonald, MalcolmUNSPECIFIED
Publisher:Springer
ISBN:978-3-642-34906-5
Status:Published
Keywords:solar sailing, blistering
Event Title:Third International Symposium on Solar Sailing
Event Location:Glasgow, UK
Event Type:international Conference
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Space Technology
DLR - Research area:Raumfahrt
DLR - Program:R SY - Technik für Raumfahrtsysteme
DLR - Research theme (Project):R - Entfaltungstechnologie . Solar Sail (old)
Location: Bremen
Institutes and Institutions:Institute of Space Systems > Mechanic and Thermal Systems
Deposited By: Sznajder, Dr.-Ing. Maciej
Deposited On:16 Nov 2016 11:52
Last Modified:31 Jul 2019 20:04

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