Adhesives joining for Ultra-Stable structures
Adhesives joining for Ultra-Stable C/C Based Component and for Zerodur–CFRP–Zerodur sandwich structures for Aerospace Applications
Description
This activity regards the development of high-performance adhesives to join components for aerospace applications: carbon fiber reinforced composites (C/C) and Zerodur to a carbon fiber reinforced polymers (CFRPs) honeycomb in a sandwich structure
Several different adhesive formulations, based on phenolic or cyanate-ester resins (charged with the maximum experimentally feasible amount of carbon-based fillers), are developed and tested, in order to guarantee sound mechanical strength, a low coefficient of thermal expansion, and ease of application on large components.
a) Results obtained at room temperature on adhesive joined C/Cs, b) Set up of the lap-shear test, c) a typical load/displacement curve: the line at 12 MPa evidences the minimum requested mechanical strength; the two selected adhesives are highlighted.
a) Sketch of the sandwich structure and b) the final prototype with face sheets made of Zerodur and CFRP honeycomb in between. The
adhesive joint between CFRPs and Zerodur is visible.
Phenolic
adhesive bonded CFRPs: a) SEM polished cross sections at increased magnification
showing the residual porosity in the phenolic adhesive, b,c) the perfect wettability
at the adhesive–CFRPs interface. Inorganic charges in the phenolic adhesive are also
visible in all the pictures.
Contact
monica.ferraris@polito.it
Recent reference(s)
V.Casalegno, S. De la Pierre des Ambrois, I.Corazzari, F.Turci, P. Tatarko, O. Damiano, L. Cornillon, A.Terenzi, M. Natali, D. Puglia, L.Torre, M. Ferraris Design, Realization, and Characterization of Advanced Adhesives for Joining Ultra‐Stable C/C Based Components, Macromolecular Materials and Engineering, 2020, 305(9), 2000229, https://doi.org/10.1002/mame.202000229
De la Pierre des Ambrois, S., Corazzari, I., Damiano, O.,Cornillon L., Casalegno, V., Ferraris, M., Adhesive Joining of Zerodur–CFRP–Zerodur Sandwich Structures for Aerospace Applications Macromolecular Materials and Engineering, 2020, 2000464
DOI: 10.1002/mame.202000464