Therefore, a comprehensive analysis of our nano-laminated coatings in the as deposited state and after thermal treatments in vacuum and air up to 1600 C was carried out.Emphasis will be given to the development of new thin films for mechanical, tribological, optical, biological and energy-based applications.
Moreover, the concept and practice of tailoring the structure and morphology of a given coating or thin film system to modify its properties has been long used to add new functionalities and improved behavior to several materials and devices. However, the development of new products and the need to enhance materials functionalities requires the optimization of the coating or thin film system to respond to the increasing demands of a targeted application. Nano-engineering of surfaces is playing a fundamental role in this particular area of research, either in the case of new materials development or in their modification. ![]() Areas of particular interest will include, but not limited to, the following topics. Add Fundamentals of thin film growth: diagnostics, analysis and modeling 1: Kostas Sarakinos Ivan Petrov 09:00 CONTROL OF MICRO- AND NANOSTRUCTURE IN TRANSITION METAL NITRIDES AND BORIDES: RECENT ADVANCES Authors: Ivan Petrov, G. Greczynski, J. Rosen, J. Birch, L. Hultman, J.E. Greene Affiliations: Frederick Seitz Materials Research Laboratory and Materials Science Department, University of Illinois, Urbana, Illinois 61801. We will review the fundamental film growth processes - nucleation, coalescence, competitive growth, and recrystallization - and their role in thin film microstructure evolution as a function of substrate temperature. Special attention will paid to in-situ substrate treatment by ion-irradiation and its effect on film microstructure and adhesion. We will also review recent advances in the selective use of metal ions during HIPIMS co-sputtering to extend the attainable structures and properties in metastable TMN with examples of Ti(1-x)AlxN, Ti(1-x)SixN, ad Ti(1-x)TaxN. We probe the effects of (i) metal versus rare-gas ion irradiation as well as (ii) the type of metal ion uses (Ti vs Me). We employ a metastable NaCl-structure Ti0.39Al0.61N as a model system to demonstrate that switching from Ar- to Al-dominated bombardment eliminates phase separation, minimizes renucleation during growth, reduces the high concentration of residual point defects, and thus results in dense, single-phase, stress-free films. ![]() A common problem in sputter-deposited MiBx layers is that the film contains excess boron with x ranging from 2.4 to 3.5. It is important to be able to control the BTM ratio during film growth as a first step to synthesizing epitaxial single crystal films in order to investigate their fundamental properties. We use TiBx as a model system and study the effect of the discharge pressure and plasma density on the BTi ratio during magnetron sputtering of a TiB2 target. We present results from establishing control of the BTi ratio in magnetron sputter-deposited TiBx thin film and to synthesize stoichiometric single crystalline TiB2 layers. While it is widely accepted that this process is driven by surface energy minimization, it is currently not understood how 3D island formation and evolution occurs at an atomistic level. Seeking to achieve this understanding, in this work we employ kinetic Monte-Carlo simulations that describe in a fully atomistic fashiongrowth of Ag on weakly interacting FCC-structured substrates. Our data reveal the following chain of atomic events that lead to compact 3D island shapes: 3D nuclei are first formed due to facile step ascent at the substrate level, followed by microfaceting on the sides of the 3D island, which in turn facilitate upward diffusion from the island base to its summit. Furthermore, our results highlight differences in periphery diffusion around strongly faceted and monolayer islands, with indications of a new type of corner-crossing diffusion anisotropy that promotes the growth of (100) facets over (111) for certain temperatures. Q.1.2 09:45 Atomic scale investigations of thermally treated MoSiBTiAlN nano-multilayers Authors: E. Aschauer1, S. Sackl2, C.M. Koller1, T. Schachinger3, M. Arndt4, P. Polcik5, H. Riedl1,6, and. PVD arises the possibility to combine coating materials with contrary properties such as hardness and toughness, or thermal stability with self-lubrication to gain revolutionary characteristics. However, to gain a deeper understanding on the thermo-mechanical properties and the reaction kinetics during thermal exposure, a set of high resolution techniques, including high resolution transmission electron microscopy, electron energy loss and energy-dispersive X-ray spectroscopy, as well as selected area diffraction, compared to atom probe tomography are used for an in-depth analysis.
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