کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5351391 | 1503657 | 2014 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structural, mechanical and oxidation characteristics of siliconized Ti-Al-X (XÂ =Â Nb, Ta) alloys
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Structural, mechanical and oxidation characteristics of siliconized Ti-Al-X (XÂ =Â Nb, Ta) alloys Structural, mechanical and oxidation characteristics of siliconized Ti-Al-X (XÂ =Â Nb, Ta) alloys](/preview/png/5351391.png)
چکیده انگلیسی
In this work, Ti-46.6Al, Ti-45.2Al-7.2Nb and Ti-44.8Al-6.6Ta alloys were siliconized by being buried in Si powder followed by heating (900, 1000 and 1100 °C for 2-12 h). Observation of the silicide formation kinetics showed that at 900 °C, the layers grow linearly with time. Meanwhile, at 1000 and 1100 °C, the growth is suppressed after the first two hours of siliconizing. Structure and composition observations revealed that, regardless of the composition of the substrate, the silicide layers formed at 900 and 1000 °C are composed of sublayers of TiSi2 and TiSi, elongated-shape TiSi crystals and a titanium-depleted sublayer at the silicide/metal interface. The layer formed at 1100 °C is Ti5Si3 with an external layer of Al2O3. The obtained silicide layers possessed very high hardness and improved oxidation resistance. This effect was significantly more pronounced in the case of the ternary alloys.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 307, 15 July 2014, Pages 579-588
Journal: Applied Surface Science - Volume 307, 15 July 2014, Pages 579-588
نویسندگان
TomáÅ¡ Popela, Dalibor VojtÄch, Jean-Bernard Vogt, Alena Michalcová,