کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6606765 | 459525 | 2016 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure characteristics and phase transformations of the Ni-P and Ni-P-Re electroless deposited coatings after heat treatment
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Microstructure characteristics and phase transformations of the Ni-P and Ni-P-Re electroless deposited coatings after heat treatment Microstructure characteristics and phase transformations of the Ni-P and Ni-P-Re electroless deposited coatings after heat treatment](/preview/png/6606765.png)
چکیده انگلیسی
The microstructure and phase composition of Ni-P and Ni-P-Re layers with medium phosphorus content of 8.8 and 8.2Â wt. % of P, respectively, and 6.8Â wt.% of Re electroless plated on copper substrate were studied. Both of the deposits showed amorphous X-ray profile, however, as it was expected, the presence of small (about 10Â nm in size) nanocrystallites was observed in both kinds of plating under transmission electron microscope (TEM). The crystallization temperatures, measured in the range of 298-773Â K, significantly increased with rhenium content as well as with increasing heating rate and differed by about 40Â K. The activation energy calculated based on the Kissinger's model in the case of Ni-8.2P-6.8Re plating was 217.7Â kJÂ molâ1 and for Ni-8.8Â P was 206.3Â kJÂ molâ1. X-ray diffraction (XRD) measurements of the Ni-P deposits carried out after the heat treatment indicated the presence of the Ni and Ni3P phases, which was confirmed by electron diffraction and high resolution observations in TEM. XRD data concerning Ni-P-Re plating revealed the following phases: Ni, Ni3P, Ni0.21Re0.79, Ni5P2 and NiP, while TEM investigation confirmed the presence of Ni3P, NiP, Ni5P2 so far. Due to the very local information gathered from the TEM, this result needs further studies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 209, 10 August 2016, Pages 183-191
Journal: Electrochimica Acta - Volume 209, 10 August 2016, Pages 183-191
نویسندگان
J. Wojewoda-Budka, A. Wierzbicka-Miernik, L. Litynska-Dobrzynska, M.J. Szczerba, G. Mordarski, M. MosiaÅek, Z. Huber, P. Zieba,