caa a22 4500 445844353 CHVBK 20180317145354.0 cr unu---uuuuu 170323e20110801xx s 000 0 eng 10.1007/s11085-010-9228-0 doi (NATIONALLICENCE)springer-10.1007/s11085-010-9228-0 Cyclic Oxidation and Hot Corrosion Behavior of Y/Cr-Modified Aluminide Coatings Prepared by a Hybrid Slurry/Pack Cementation Process [Elektronische Daten] [Jintao Lu, Shenglong Zhu, Fuhui Wang] Y/Cr-modified aluminide coatings were prepared on a Ni-base superalloy K417G using a hybrid slurry/pack cementation process. The coatings consisted of a NiAl layer with dissolved Cr and Y. The microstructures and high temperature corrosion behavior of the coatings were characterized using SEM/EDS, XRD, EPMA and SIMS. Cyclic oxidation tests at 1000°C for 200h were carried out in air. The results indicated that specimens coated by either the Y/Cr-modified aluminide coatings or the simple aluminide coatings exhibited better oxidation resistances than the cast alloy. The Y/Cr-modified aluminide coatings possessed lower oxidation rates and better degradation resistance than the simple aluminide coatings during the oxidation tests. Furthermore, the alumina scales formed on the Y/Cr-modified aluminide coatings were considerably more adherent than those on the simple aluminide coatings during the thermal cycling. The hot corrosion tests consisted of applying a 25wt% K2SO4 +75wt% Na2SO4 salt mixture to the specimens and exposing at 900°C. The Y/Cr-modified aluminide coatings showed the longest service life compared with the cast alloy and aluminide coatings, which suffered significant sulfur attack. After 200h, the Y/Cr-modified aluminide coatings were still protective. Springer Science+Business Media, LLC, 2010 Y/Cr-modified aluminide coating nationallicence Pack cementation process nationallicence Slurry nationallicence Oxidation nationallicence Hot corrosion nationallicence Lu Jintao State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Science, Wencui Road 62#, 110016, Shenyang City, People's Republic of China aut Zhu Shenglong State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Science, Wencui Road 62#, 110016, Shenyang City, People's Republic of China aut Wang Fuhui State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Science, Wencui Road 62#, 110016, Shenyang City, People's Republic of China aut Oxidation of Metals Springer-Verlag 76/1-2(2011-08-01), 67-82 0030-770X 76:1-2<67 2011 76 11085 https://doi.org/10.1007/s11085-010-9228-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11085-010-9228-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Lu Jintao State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Science, Wencui Road 62#, 110016, Shenyang City, People's Republic of China aut NATIONALLICENCE 700 1- Zhu Shenglong State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Science, Wencui Road 62#, 110016, Shenyang City, People's Republic of China aut NATIONALLICENCE 700 1- Wang Fuhui State Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Science, Wencui Road 62#, 110016, Shenyang City, People's Republic of China aut NATIONALLICENCE 773 0- Oxidation of Metals Springer-Verlag 76/1-2(2011-08-01), 67-82 0030-770X 76:1-2<67 2011 76 11085 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer