اثر پارامترهای آبکاری پالسی بر میزان رسوب ذرات تقویت‌کننده در پوشش کامپوزیتی نیکل-تنگستن/اکسید سریم

نوع مقاله : مقاله پژوهشی

نویسنده

دانشکده مهندسی مواد، مجتمع آموزش عالی فنی و مهندسی

چکیده

اخیراً، پوشش‌های نیکل-تنگستن (Ni-W) به‌عنوان یک لایه مقاوم به خوردگی، مقاوم در برابر سایش و دارای سختی بالا توسط بسیاری از محققین مورد بررسی قرار گرفته‌اند. با این‌حال، برای بهبود عملکرد این پوشش‌ها، از ذرات تقویت‌کننده و تشکیل کامپوزیت نیز استفاده می‌شود. بنابراین در این کار تحقیقاتی پوشش کامپوزیتی نیکل-تنگستن تقویت شده با ذرات اکسید سریم (CeO2) به روش آبکاری الکتریکی با جریان پالسی بر روی فلز مس خالص ایجاد شد. با استفاده از میکروسکوپ الکترونی روبشی گسیل میدانی (FESEM)، ریز ساختار، ترکیب شیمیایی و ضخامت پوشش اعمالی مورد بررسی قرار گرفت. آنالیز اشعه ایکس (XRD) برای تعیین فازهای تشکیل شده در پوشش اعمالی استفاده شد. اثر پارامترهای فرایند آبکاری پالسی شامل درصد زمان روشنایی، فرکانس و شکل موج جریان بر روی میزان هم رسوبی ذرات تقویت‌کننده در زمینه نیکل-تنگستن مورد بررسی قرار گرفت. نتایج نشان داد درصد افزایش زمان روشنایی تا 70 درصد، افزایش فرکانس تا 100 هرتز و استفاده از جریان پالسی با شکل موج مربعی باعث رسوب ذرات بیشتری در پوشش شد. پوشش کامپوزیتی تحت این شرایط بهینه، با توزیع یکنواخت از ذرات تقویت‌کننده، ضخامت یکنواخت و چسبندگی بسیار خوب به زیرلایه، تشکیل شد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Effect of Pulse Electroplating Parameters on the Deposition of Reinforcing Particles in Ni-W/CeO2 Composite Coating

نویسنده [English]

  • F. Saeidpour
Department of Materials Engineering, Esfarayen University of Technology, Esfarayen, North Khorasan Province. Iran
چکیده [English]

Recently, nickel-tungsten (Ni-W) coatings have been investigated by many researchers as a corrosion-resistant, wear-resistant, and high-hardness layer. However, reinforcing particles is also used to form composite and improve the performance of these coatings. Therefore, in this research work, Ni-W composite coating reinforced with CeO2 particles was formed by electroplating method with pulse current on pure copper metal. The microstructure, chemical composition, and thickness of the applied coating were investigated using field emission scanning electron microscope (FESEM). X-ray diffraction (XRD) was used to determine the phases formed in the applied coating. The effect of the parameters of the pulse plating process, including duty cycle, frequency, and waveform was investigated on the co-precipitation of reinforcing particles in the Ni-W matrix. The results showed that increasing duty cycle up to 70%, increasing the frequency up to 100 Hz, and using pulsed current with a square wave shape caused more particles to deposit in the coating. Under these optimal conditions, the composite coating was formed with uniform distribution of reinforcing particles, uniform thickness, and very good adhesion to the substrate.

کلیدواژه‌ها [English]

  • Pulse electroplating
  • Ni-W/CeO2 composite coating
  • Duty cycle
  • Frequency
  • Waveform

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مواد پیشرفته در مهندسی
دوره 41، شماره 3
آذر 1401
صفحه 63-77

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