caa a22 4500 445844302 CHVBK 20180317145354.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s11085-011-9251-9 doi (NATIONALLICENCE)springer-10.1007/s11085-011-9251-9 Effects of Platinum on the Hot Corrosion Behavior of Hf-Modified γ′-Ni3Al+γ-Ni-Based Alloys [Elektronische Daten] [Vinay Deodeshmukh, Brian Gleeson] The establishment of a protective α-Al2O3 scale is critical for providing high temperature protection from oxidation and hot corrosion, thereby improving lifetimes of advanced gas turbine engine components. Recent work by our group has shown that a wide range of Pt+Hf-modified γ′-Ni3Al+γ-Ni alloy compositions form a very adherent and slow-growing Al2O3 scale and exhibit excellent oxidation resistance. The main thrust of the present study was to understand the effects of Pt addition on the Type I (900°C) and Type II (705°C) hot corrosion (HC) behavior of model Hf-modified γ′+γ alloy compositions. The salt used to bring about hot corrosion was Na2SO4. It was found that the Type I HC resistance of γ′+γ alloys improved with up to about 10at.% Pt addition, but then decreased significantly with increasing Pt content up to 30at.% (the maximum level studied); however, under Type II HC conditions the resistance of γ′+γ alloys progressively improved with increasing Pt content up to 30at.%. The effect of pre-oxidation on hot corrosion resistance was also examined, and the results indicated that pre-oxidation generally improved Type II HC resistance for the test duration studied. Springer Science+Business Media, LLC, 2011 γ′+γ alloy nationallicence Platinum effect nationallicence Pre-oxidation nationallicence Type I hot corrosion nationallicence Type II hot corrosion nationallicence Deodeshmukh Vinay Department of Materials Science and Engineering, Iowa State University, 2220 Hoover Hall, 50011-2300, Ames, IA, USA aut Gleeson Brian Department of Materials Science and Engineering, Iowa State University, 2220 Hoover Hall, 50011-2300, Ames, IA, USA aut Oxidation of Metals Springer-Verlag 76/1-2(2011-08-01), 43-55 0030-770X 76:1-2<43 2011 76 11085 https://doi.org/10.1007/s11085-011-9251-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11085-011-9251-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Deodeshmukh Vinay Department of Materials Science and Engineering, Iowa State University, 2220 Hoover Hall, 50011-2300, Ames, IA, USA aut NATIONALLICENCE 700 1- Gleeson Brian Department of Materials Science and Engineering, Iowa State University, 2220 Hoover Hall, 50011-2300, Ames, IA, USA aut NATIONALLICENCE 773 0- Oxidation of Metals Springer-Verlag 76/1-2(2011-08-01), 43-55 0030-770X 76:1-2<43 2011 76 11085 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer