کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5454735 | 1514359 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Structure-dependent mechanical behavior of copper thin films
ترجمه فارسی عنوان
ساختار وابسته به رفتار مکانیکی فیلم های نازک مس
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کلمات کلیدی
فیلم نازک مس، تست میکرو کششی، رابطه سالن پچ، ساختار میکرو، درجه حرارت بالا،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
چکیده انگلیسی
The mechanical properties of copper foils electroplated with (200) and (220) preferred orientations and thicknesses of 8-24 μm were assessed at various temperatures. It was found that the yield strength and elastic modulus both decrease with increasing temperature to 150 °C, and that the greater susceptibility of a columnar structure to defects makes it more sensitive to temperature than an equiaxed structure. Thus, for a given grain size, a columnar structure has a lower yield strength. A modified Hall-Petch relation was subsequently developed to take into account the effect of micro-structure on material strength by introducing a structure factor (S) : Ïy = Ï0 + kdâ 1/2 + S. As the slope (k) of this equation is constant, it can be used for copper thin films of any thickness, provided they are at room temperature and above the micro-level in scale. This structure factor concept, however, is only valid at room temperature. In the modified Hall-Petch relation, the new variable related to the equiaxed and columnar structures in the copper thin films was abstracted from the Hall-Petch relation. Then, if the materials are the same, the k value and the Ï0 value are constant regardless of the scale, and the relationship between the grain size and the yield strength can be shown by only changing the structure factor.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Characterization - Volume 128, June 2017, Pages 68-74
Journal: Materials Characterization - Volume 128, June 2017, Pages 68-74
نویسندگان
Yong-Seok Lee, Sangyul Ha, Jin-Hyoung Park, Soon-Bok Lee,