TY - JOUR
T1 - Ultrasonic welding of carbon/epoxy and carbon/PEEK composites through a PEI thermoplastic coupling layer
AU - Villegas, Irene Fernandez
AU - van Moorleghem, Regis
PY - 2018/6/1
Y1 - 2018/6/1
N2 - This paper investigates welding of carbon/epoxy and carbon/PEEK composites using the following procedure. Firstly, the carbon/epoxy composite was made “weldable” through a very thin PEI thermoplastic film co-cured on its surface. During the curing cycle, the PEI resin and the components of the epoxy resin system partially diffused into each other generating a gradient interphase between the original epoxy and PEI resins. Subsequently, the carbon/PEEK composite adherend was welded onto the PEI-rich surface of the weldable carbon/epoxy adherend, exploiting the total miscibility between PEI and PEEK. Thermal degradation of the carbon/epoxy adherend during the welding process was avoided via the ultra-short heating times enabled by the ultrasonic welding technology. In this research, mechanical testing was used to evaluate the weld strength relative to reference joints. Additionally, cross-section scanning electron microscopy was used to assess the morphology of the PEI/epoxy interphase before and after the welding process.
AB - This paper investigates welding of carbon/epoxy and carbon/PEEK composites using the following procedure. Firstly, the carbon/epoxy composite was made “weldable” through a very thin PEI thermoplastic film co-cured on its surface. During the curing cycle, the PEI resin and the components of the epoxy resin system partially diffused into each other generating a gradient interphase between the original epoxy and PEI resins. Subsequently, the carbon/PEEK composite adherend was welded onto the PEI-rich surface of the weldable carbon/epoxy adherend, exploiting the total miscibility between PEI and PEEK. Thermal degradation of the carbon/epoxy adherend during the welding process was avoided via the ultra-short heating times enabled by the ultrasonic welding technology. In this research, mechanical testing was used to evaluate the weld strength relative to reference joints. Additionally, cross-section scanning electron microscopy was used to assess the morphology of the PEI/epoxy interphase before and after the welding process.
KW - A. Polymer-matrix composites (PMCs)
KW - A. Thermoplastic resin
KW - A. Thermosetting resin
KW - E. Joints/joining
UR - http://www.scopus.com/inward/record.url?scp=85042940623&partnerID=8YFLogxK
UR - http://resolver.tudelft.nl/uuid:a2e9c315-99d0-4e24-81fc-424fe5448e5e
U2 - 10.1016/j.compositesa.2018.02.022
DO - 10.1016/j.compositesa.2018.02.022
M3 - Article
AN - SCOPUS:85042940623
SN - 1359-835X
VL - 109
SP - 75
EP - 83
JO - Composites Part A: Applied Science and Manufacturing
JF - Composites Part A: Applied Science and Manufacturing
ER -