Sidorenko, A Ahn, HS Kim, DI Yang, H Tsukruk, VV 2024-01-21T10:35:44Z 2024-01-21T10:35:44Z 2022-01-10 2002-06 0043-1648 https://pubs.kist.re.kr/handle/201004/139484 A polymer trilayer (sandwiched) film with a thickness of 20-30 run has been designed to serve as a wear resistant nanoscale coating for silicon surfaces. These surface structures are formed by a multiple grafting technique applied to self-assembled monolayers (SAM) and functionalized tri-block copolymer, followed by the photopolymerization of a topmost polymer layer. The unique design of this layer includes a hard-soft-hard nanoscale architecture with a compliant rubber interlayer mediating localized stresses transferred through the topmost hard layer. This architecture provides a non-linear mechanical response under a normal compression stress and allows additional dissipation of mechanical energy via the highly elastic rubber interlayer. At modest loads, this coating shows friction coefficient against hard steel below 0.06, which is lower than that for a classic molecular lubricant, alkylsilane SAM. At the highest pressure tested in this work, 1.2 GPa, the sandwiched coating possesses four times higher wear resistance than the SAM coating, The wear mechanism for this coating is stress and temperature induced oxidation in the contact area followed by severe plowing wear. (C) 2002 Elsevier Science B.V. All rights reserved. English ELSEVIER SCIENCE SA SCANNING PROBE MICROSCOPY MECHANICAL-PROPERTIES FILMS PHOTOPOLYMERIZATIONS MONOLAYERS EVOLUTION Wear stability of polymer nanocomposite coatings with trilayer architecture Article 10.1016/S0043-1648(02)00048-0 1 WEAR, v.252, no.11-12, pp.946 - 955 WEAR 252 11-12 946 955 scie scopus 000176791700009 2-s2.0-0036601413 Engineering, Mechanical Materials Science, Multidisciplinary Engineering Materials Science Article SCANNING PROBE MICROSCOPY MECHANICAL-PROPERTIES FILMS PHOTOPOLYMERIZATIONS MONOLAYERS EVOLUTION wear stability MEMS nanocomposite coatings boundary lubricants