کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5370076 1388470 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Microstructure and properties of Ni-Co/nano-Al2O3 composite coatings by pulse reversal current electrodeposition
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
Microstructure and properties of Ni-Co/nano-Al2O3 composite coatings by pulse reversal current electrodeposition
چکیده انگلیسی

Ni-Co/nano-Al2O3 (Ni-Co/Al2O3) composite coatings were prepared under pulse reversal current (PRC) and direct current (dc) methods respectively. The microstructure of coatings was characterized by means of XRD, SEM and TEM. Both the Ni-Co alloy and composite coatings exhibit single phase of Ni matrix with face-centered cubic (fcc) crystal structure, and the crystal orientation of the Ni-Co/Al2O3 composite coating was transformed from crystal face (2 0 0) to (1 1 1) compared with alloy coatings. The hardness, anti-wear property and macro-residual stress were also investigated. The results showed that the microstructure and performance of the coatings were greatly affected by Al2O3 content and the electrodeposition methods. With the increasing of Al2O3 content, the hardness and wear resistance of the composite coatings enhanced. The PRC composite coatings exhibited compact surface, high hardness, better wear resistance and lower macro-residual stress compared with that of the dc composite coatings.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Surface Science - Volume 253, Issue 4, 15 December 2006, Pages 2132-2137
نویسندگان
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