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O: Fachverband Oberflächenphysik

O 103: Poster Session VIII: Surface reactions II

O 103.5: Poster

Thursday, March 4, 2021, 13:30–15:30, P

Interfacial chemical bonding of protective (Ti,Al)N coatings grown on polycarbonate — •Lena Patterer, Soheil Karimi Aghda, Damian Mauritius Holzapfel, and Jochen Michael Schneider — Materials Chemistry, RWTH Aachen University, Kopernikusstr. 10, 52074 Aachen, Germany

Due to its superior mechanical properties as well as oxidation resistance, (Ti,Al)N coatings are commonly used as protective coatings for cutting and forming tools. However, less attention has been drawn so far to its application as protective coatings onto polymer components. To identify the chemical reactions and the corresponding bond formation at the (Ti,Al)N | polycarbonate interface, a detailed X-ray photoelectron spectroscopy analysis is performed on pulsed direct current magnetron sputtered (DCMS) (Ti,Al)N coatings deposited onto polycarbonate. To this end, the coating thickness was less than 2 nm to ensure that the chemical state information including the interfacial region is probed. By comparing to the chemical state information of the uncoated polycarbonate, the formation of CNx as well as of C-O-(Ti,Al) bonds is identified. Hence, it is reasonable to assume that these bonds serve as chemical link across the interface and firmly anchor the (Ti,Al)N coating on the polycarbonate substrate.