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Hot corrosion behavior of the spray-formed nickel-based superalloy |
| Min Xia(夏敏)1, Tian-Fu Gu(谷天赋)1, Chong-Lin Jia(贾崇林)1,2, Chang-Chun Ge(葛昌纯)1 |
1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;
2. Science and Technology on Advanced High Temperature Structural Materials Laboratory, Beijing Institute of Aeronautical Materials, Beijing 100095, China |
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Abstract An investigation of low temperature hot corrosion is carried out on a spray-formed nickel-based superalloy FGH100 pre-coated with Na2SO4-NaCl at 700℃ for 100 h. Mass gain measurement, x-ray diffraction, scanning electron microscopy, and energy dispersive x-ray spectroscopy are used to study the corrosion behavior. Results reveal that corrosion behavior follows a sequence, that is, first rapidly proceeding, then gradually slowing down, and finally forming an outer layer composed of different types of oxides and an inner layer mainly comprised of sulfides. In-depth analysis reveals that the hot corrosion of FGH100 is a combined effect of oxidation-sulfidation and transfer of oxides.
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Received: 13 July 2016
Revised: 09 September 2016
Accepted manuscript online:
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PACS:
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81.20.Ev
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(Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation)
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83.50.Uv
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(Material processing (extension, molding, etc.))
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62.20.-x
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(Mechanical properties of solids)
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Corresponding Authors:
Min Xia, Chang-Chun Ge
E-mail: xmdsg@ustb.edu.cn;ccge@mater.ustb.edu.cn
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Cite this article:
Min Xia(夏敏), Tian-Fu Gu(谷天赋), Chong-Lin Jia(贾崇林), Chang-Chun Ge(葛昌纯) Hot corrosion behavior of the spray-formed nickel-based superalloy 2016 Chin. Phys. B 25 128103
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