naa a22 4500 510772293 CHVBK 20180411083218.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11837-012-0520-0 doi (NATIONALLICENCE)springer-10.1007/s11837-012-0520-0 Extended Functionality of Environmentally-Resistant Mo-Si-B-Based Coatings [Elektronische Daten] [J. Perepezko, R. Sakidja] Multiphase Mo-Si-B alloys with compositions which yield the ternary intermetallic Mo5SiB2 (T2) phase as a key microstructure constituent together with the Mo and Mo3Si phases, offer an attractive balance of high melting temperature, oxidation resistance, and mechanical properties. The investigation of reaction kinetics involving the T2 phase enables the analysis of oxidation in terms of diffusion pathways and the design of effective coatings. From this basis, kinetic biasing is used together with pack cementation to develop Mo-Si-B-based multilayered coatings with an aluminoborosilica surface and in situ diffusion barriers with self-healing characteristics for enhanced oxidation resistance. While a combustion environment contains water vapor that can accelerate an attack of silica-based coatings, the Mo-Si-B-based coatings provide oxidation resistance in water vapor up to at least 1,500°C. An exposure to hot ionized gas species generated in an arc jet confirms the robust coating performance in extreme environments. To extend the application beyond Mo-based systems, a two-stage process has been implemented to provide effective oxidation resistance for refractory metal cermets, SiC and ZrB2 ultra-high-temperature composites. TMS, 2012 Perepezko J. Department of Materials Science & Engineering, University of Wisconsin-Madison, 53706, Madison, WI, USA aut Sakidja R. Department of Materials Science & Engineering, University of Wisconsin-Madison, 53706, Madison, WI, USA aut JOM Springer US; http://www.springer-ny.com 65/2(2013-02-01), 307-317 1047-4838 65:2<307 2013 65 11837 https://doi.org/10.1007/s11837-012-0520-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11837-012-0520-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Perepezko J. Department of Materials Science & Engineering, University of Wisconsin-Madison, 53706, Madison, WI, USA aut NATIONALLICENCE 700 1- Sakidja R. Department of Materials Science & Engineering, University of Wisconsin-Madison, 53706, Madison, WI, USA aut NATIONALLICENCE 773 0- JOM Springer US; http://www.springer-ny.com 65/2(2013-02-01), 307-317 1047-4838 65:2<307 2013 65 11837 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer