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07468 Evaluation of Iron Aluminide Coatings for Oxidation Protection in Water Vapor Environment

Picture for 07468 Evaluation of Iron Aluminide Coatings for Oxidation Protection in Water Vapor Environment
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Product Number: 51300-07468-SG
ISBN: 07468 2007 CP
Author: Ying Zhang, Y.Q. Wang, and Bruce A. Pint
Publication Date: 2007
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Long-term (> 10,000h) oxidation behavior of aluminide coatings made by chemical vapor deposition (CVD) or pack cementation on representative ferritic (Fe-9Cr-1Mo) and austenitic (type 304L stainless steel) are being studied in air + 10% water vapor in the temperature range of 650-800°C. Unlike the uncoated alloys, which are severely attacked in this environment, the CVD aluminide coatings have not failed after 16,000h at 700°C or 10,000h at 800°C. The pack aluminide coatings also show good oxidation protection after testing for ~5,000h at 700°C. In addition, initial efforts have been made to fabricate coatings at lower aluminizing temperatures and the current results suggest that FeAl coatings can be synthesized at temperatures as low as 700°C.
Long-term (> 10,000h) oxidation behavior of aluminide coatings made by chemical vapor deposition (CVD) or pack cementation on representative ferritic (Fe-9Cr-1Mo) and austenitic (type 304L stainless steel) are being studied in air + 10% water vapor in the temperature range of 650-800°C. Unlike the uncoated alloys, which are severely attacked in this environment, the CVD aluminide coatings have not failed after 16,000h at 700°C or 10,000h at 800°C. The pack aluminide coatings also show good oxidation protection after testing for ~5,000h at 700°C. In addition, initial efforts have been made to fabricate coatings at lower aluminizing temperatures and the current results suggest that FeAl coatings can be synthesized at temperatures as low as 700°C.
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