کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1601462 | 1005199 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural characterization of the scale formed on a Ti-46Al-8Nb alloy oxidised in air at 700 °C
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Structural characterization of the scale formed on a Ti-46Al-8Nb alloy oxidised in air at 700 °C Structural characterization of the scale formed on a Ti-46Al-8Nb alloy oxidised in air at 700 °C](/preview/png/1601462.png)
چکیده انگلیسی
The structures of the oxide scale formed on a lamellar (γ + α2) Ti46Al8Nb alloy after heat-treatment in air at 700 °C for 50 and 1000 h have been compared. Though the outer scale is thicker after 1000 h, both oxide scales are similarly layered with an outer aluminium-rich layer. The main difference is that the aluminium-rich oxide is amorphous after 50 h while it becomes cubic gamma alumina after 1000 h. After 50 h, the presence of TiN was detected at the interface between the scale and the base metal. After 1000 h of oxidation, the subscale region is divided into two clearly separated zones differing by their composition, with a thick TiN layer close to the oxide scale. From these observations, it appears that the development of the oxide scale at 700 °C is similar to the scheme proposed in the literature for short times at higher temperatures, with the initial formation of a transient aluminium-rich oxide layer, which here is amorphous, and precipitates of TiN at the scale/metal interface that oxidise afterwards to rutile.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Intermetallics - Volume 18, Issue 2, February 2010, Pages 226-232
Journal: Intermetallics - Volume 18, Issue 2, February 2010, Pages 226-232
نویسندگان
P.E. Tchoupé Ngnekou, M.-C. Lafont, F. Senocq, L. Laffont, B. Viguier, J. Lacaze,