کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8016734 | 1517210 | 2016 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Surface phase transition in Cu-Fe solid solutions
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Surface phase transition in Cu-Fe solid solutions Surface phase transition in Cu-Fe solid solutions](/preview/png/8016734.png)
چکیده انگلیسی
Particles of a second phase on grain boundaries and free surface in copper-based solid solutions with iron were observed. Previously the samples were tested on diffusion creep for surface free energy measurements. The test method is based on measuring of time dependences of stress in foils. The stresses were low (up to 300 kPa) and most of time the foils were balancing around zero stress. Experiments were performed in a dry hydrogen atmosphere. The temperature range was from about 900 °C to 1070 °C. The volume concentration of iron for second phase formation on surfaces was about 0.4 at% Fe. The particles had uniform distribution on the grain boundaries and free surface. The average sizes are from 20 nm at 0.4 at% to about 1 µm at 0.74 at% Fe. The surface phase transition is confirmed by measurements of viscosity and surface energy. Surface free energy isotherm has extremum near 0.4 at% Fe and temperature dependence of viscosity has a gap at Fe concentration higher 0.4 at%.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 178, 1 September 2016, Pages 1-4
Journal: Materials Letters - Volume 178, 1 September 2016, Pages 1-4
نویسندگان
S. Zhevnenko, A. Rodin, A. Smirnov,