کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1584096 | 1514899 | 2007 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of Ta on microstructure and phase distribution in cyclic oxidized Ir-Ta modified aluminide coatings on nickel base single crystal superalloy
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The effect of Ir-Ta coating (with varying amounts of Ta) on microstructure, composition variation and phase distribution in the modified aluminides on Ni-base single crystal superalloy, TMS-75 subjected to cyclic oxidation has been investigated. Ir-Ta coatings with Ta = 14.1, 23.1, 40.7 and 82.9 at.% deposited on ã1 0 0ã oriented nickel base single crystal superalloy, TMS-75 were aluminized and subjected to cyclic oxidation at 1373 K, for 600 h. The mass gain as a function of number of cycles data demonstrates an improved oxidation resistance with decreasing Ta content. In contrary to Ta-rich aluminides, Ir-rich aluminides show a large volume fraction of the β-phase, a less amount of γâ²-Ni3Al phase near the surface of the coatings. Rapid decrease in the concentration of Al in the diffusion zone and formation of interconnected γâ²-Ni3Al has been found to be responsible for the lower oxidation resistance of Ta-rich aluminides.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volumes 452â453, 15 April 2007, Pages 254-261
Journal: Materials Science and Engineering: A - Volumes 452â453, 15 April 2007, Pages 254-261
نویسندگان
P. Kuppusami, H. Murakami,