نانومقیاس

نانومقیاس

بررسی مقایسه‌ای و بهره‌گیری از مدل فراکتالی در سنتز و ارزیابی خواص نانوکامپوزیت‌های Zn-Mg-Cu

نوع مقاله : مقاله پژوهشی

نویسنده
دانشگاه آزاد اسلامی واحد یادگار امام خمینی (ره) شهرری
چکیده
در پژوهش انجام شده، نانوکامپوزیت‌های Zn-Mg-Cu با درصدهای وزنی مختلف مس با روش الکتروشیمیایی لایه‌نشانی شدند و خواص سطحی و فراکتالی آنها مورد مطالعه قرار گرفتند. خواص ساختاری نانوکامپوزیت‌ها با استفاده از پراش اشعه ایکس (X-Ray) و خواص ریخت شناسی آنها با میکروسکوپ الکترونی روبشی (SEM) و میکروسکوپ نیروی اتمی (AFM) ارزیابی شدند. تجزیه و تحلیل آماری بر اساس تصاویر سه بعدی AFM نشان داد که تمام نمونه‌های سنتز شده دارای خواص فراکتالی هستند و این خواص به نوع و مقدار ناخالصی بارگذاری شده در ماتریس بستگی دارد. همچنین با توجه به نتایج حاصله، اندازه دانه‌ها با افزایش درصد وزنی ناخالصی مس کاهش می‌یابد. بعد فراکتالی نانوکامپوزیت‌ها با استفاده از روش الگوریتم شمارش جعبه بین 2 و 3 اندازه‌گیری شد و نشان داد که Df مستقل از اندازه روبش سطح و وضوح پیکسل تصاویر است. نتایج نشان داد که با افزایش غلظت مس، بعد فراکتالی و زبری سطح کاهش می‌یابد و مکان نگاری سطح منظم تر می‌شود. با محاسبه ضریب شکاف β ، مشخص شد که همه‌ی نانوکامپوزیت-ها درجه بالایی از همگنی بافت سطحی با β<0.07 دارند و نانوکامپوزیت‌های ZM3C4 و ZM3C2 به ترتیب کمترین و بیشترین ضریب شکاف را در مقایسه با نانوکامپوزیت مرجع ZM3 دارند.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

Comparative Study and use of Fractal Model in Synthesis and Investigation of properties of Zn-Mg-Cu nanocomposites

نویسنده English

maryam Gholizadeh Arashti
Yadegar-e-Imam Khomeini (RAH) Shahre Rey Branch, Islamic Azad university
چکیده English

In this work, the Zn-Mg-Cu nanocomposites with different weight percent of Cu were deposited by electrochemical method and their surface and fractal properties were studied. The structural properties of the nanocomposites by X-ray diffraction (XRD) and their morphological properties by atomic force microscopy (AFM) and scanning electron microscopy (SEM) were evaluated. Statistical analysis based on 3D AFM images showed that all synthesized samples exhibit fractal properties and that these properties depend on the type and amount of impurity loaded in the matrix. Also, the results show that the grain size decreases with increasing weight percent of Cu doping. The fractal dimension (Df) of the nanocomposites were measured using the box-counting algorithm between 2 and 3, indicating that Df is independent of the surface scan size and pixel resolution of the images. The results showed that with increasing copper concentration, the fractal dimension and surface roughness decrease and the surface topography becomes more regular. By obtaining the lacunarity coefficient β, it was found that all the nanocomposites have a high degree of surface texture homogeneity with β<0.07 and that the ZM3C4 and ZM3C2 nanocomposites have the lowest and highest lacunarity coefficients compared to the reference nanocomposite ZM3.

کلیدواژه‌ها English

Nanocomposite
Cu concentration
Electrochemical method
Surface morphology
SEM and AFM analyses
Fractal properties
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دوره 12، شماره 1
بهار 1404
صفحه 87-99

  • تاریخ دریافت 22 بهمن 1403
  • تاریخ بازنگری 17 اسفند 1403
  • تاریخ پذیرش 15 فروردین 1404