Hybrid piezochromic coatings for impact detection on composite substrates for aeronautic

Hybrid piezochromic coatings for impact detection on composite substrates for aeronautic

[Display omitted] •Sol-gel hybrid coatings for impact monitoring on aeronautical composite substrates.•Piezo- and thermo-chromic coatings for reversible and reusable detecting solutions.•Sensitivity and threshold pressure are determined to be 28% GPa−1 and 0.2 GPa. Structural Health Monitoring (SHM)...

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Bibliographic Details
Published in:Materials letters Vol. 253; pp. 140 - 143
Main Authors: Morelle, Q., Senani, S., Nicole, L., Gaudon, M., Rozes, L., Le Bourhis, E.
Format: Journal Article
Language:English
Published: Amsterdam Elsevier B.V 15-10-2019
Elsevier BV
Elsevier
Subjects:
Aeronautics
Chemical Sciences
Coatings
Composite materials
Functional coating
Material chemistry
Materials science
Nanocomposites
Piezochromic
Pigments
Structural health monitoring
Substrates
Nanocomposites
Functional coating
Piezochromic
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Summary:[Display omitted] •Sol-gel hybrid coatings for impact monitoring on aeronautical composite substrates.•Piezo- and thermo-chromic coatings for reversible and reusable detecting solutions.•Sensitivity and threshold pressure are determined to be 28% GPa−1 and 0.2 GPa. Structural Health Monitoring (SHM) is a major issue in the aeronautic field, especially for impact detection on composite materials which can be time consuming. Impact-sensitive coatings are an interesting way to save costs and time associated with these monitoring operations. This paper describes the successful preparation of a reversible piezochromic coating for impacts detection on composite substrates. It results from the incorporation of piezochromic pigments into a hybrid organic-inorganic matrix. It has been optimized by studying and quantifying their piezochromic behavior by UV-visible spectroscopy. It revealed that the piezochromic properties of the sensitive coating and the pigments alone are quite different and ruled by the hardness of the film. The obtained sensitivity and threshold pressure are determined to be 28% GPa−1 and 0.2 GPa respectively.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2019.06.045