کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5468342 | 1518932 | 2017 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal stability of hard nanocomposite Mo-B-C coatings
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
In the present work, nanocomposite Mo-B-C coatings were deposited on high speed steel and hard metal substrates by magnetron sputtering of three targets. These coatings were subjected to annealing to final temperatures in the range from 500 °C to 1000 °C. It was found that the as deposited Mo-B-C coatings exhibited hardness of â¼20 GPa, nanocomposite microstructure with very fine grains (â¼2 nm) and low degree of crystallinity. The X-ray diffraction and transmission electron microscopy together with selective area electron diffraction were used to study the temperature induced changes of the microstructure of the coating and its crystallinity. The annealing process significantly improved the hardness (from â¼20 GPa to â¼30 GPa) and effective elastic modulus (from initial 330 GPa-500 GPa) of coatings while their resistance to fracture was kept sufficiently high.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 138, April 2017, Pages 199-204
Journal: Vacuum - Volume 138, April 2017, Pages 199-204
نویسندگان
L. Zábranský, V. BurÅ¡Ãková, P. SouÄek, P. VaÅ¡ina, J. DugáÄek, P. SÅ¥ahel, J. BurÅ¡Ãk, M. Svoboda, V. PeÅina,