نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکترا، مهندسی مواد، خواجه نصیرالدین طوسی، تهران.

2 استاد، مهندسی مواد، دانشگاه خواجه نصیرالدین طوسی، تهران.

3 استادیار، مهندسی مواد، دانشگاه امام حسین، تهران.

10.22068/jstc.2020.116605.1600

چکیده

در این تحقیق نانوکامپوزیت هیبریدی زمینه آلومینیوم با استفاده از نانوذرات دی سولفید تنگستن و نانولوله کربنی ساخته شد. مخلوط سازی پودرها در حلال استن و با استفاده از آلتراسونیک انجام شد سپس ذرات هیبریدی و پودر آلومینیوم تحت آسیاکاری مکانیکی قرارگرفتند و با استفاده از پرس گرم پودر نهایی فشرده‌سازی و نانوکامپوریت هیبریدی ساخته شد. بررسی میکروساختاری نمونه‌ها با استفاده از میکروسکوب نوری(OM) و میکروسکوپ الکترونی روبشی گسیل میدانی(FESEM) انجام شد. نتایج نشان داد فازهای تقویت کننده به نحو مطلوبی بر روی ذرات فلیکی آلومینیوم جذب شده اند، توزیع مناسبی از ذرات تقویت کننده در زمینه وجود دارد و تقویت کننده‌ها ساختار خود را در فاز زمینه حفظ کرده‌اند. دانسیته نمونه‌ها از روش ارشمیدوس اندازه گیری و مشخص شد دانسیته نسبی نمونه‌های هیبریدی در محدوده 96 تا 98 درصد قراردارد. آزمون میکرو سختی نشان داد هیبریدسازی اثر مثبتی بر افزایش سختی دارد به طوری که سختی نمونه‌های هیبریدی با افزایش میزان نانولوله کربنی افزایش می-یابد و 20 درصد بهبود در میکروسختی نسبت به نانوکامپوزیت آلومینیوم با تقویت کننده دی-سولفید تنگستن بوجود می‌آید. اندازه‌گیری استحکام فشاری نشان می‌دهد نانوکامپوزیت هیبریدی استحکام فشاری نهایی را تا 17 درصد افزایش می‌دهد. آزمون سایش کاهش 50 درصدی ضریب اصطکاک نانوکامپوزیت هیبریدی را نسبت به آلومینیوم خالص نشان داد.

کلیدواژه‌ها

عنوان مقاله [English]

Fabrication and investigation of properties of Al / WS2-CNT hybrid nanocomposites

نویسندگان [English]

  • Hossein Salehi Vaziri 1
  • Ali Shokuhfar 2
  • Seyyed Salman Seyyed Afghahi 3

1 Faculty of Materials Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran.

2 Faculty of Materials Science and Engineering, K. N. Toosi University of Technology, Tehran, Iran.

3 Faculty of Materials Science and Engineering, Department of Engineering, Imam Hossein University Tehran, Iran.

چکیده [English]

In this research, a hybrid aluminum matrix nanocomposite was made using tungsten disulfide nanoparticles and carbon nanotube. Ultrasonic was used for mixing powders in acetone. Then hybrid particles and aluminum powder were mixed by mmechanical stirrer for 2 h and ball mill for 5h. The final mixed powder were compressed by hot pressing. Microstructural analysis of the specimens was performed by Optical Microscopy (OM) and Field Emission Scanning Electron Microscopy (FESEM). The results showed that the reinforcement phases were properly adsorbed on aluminum particles, there was a good distribution of the reinforcement particles in the aluminum matrix, and nanoparticles maintained their structure. The density of samples was measured by Archimedes method and the relative density of hybrid samples was found to be 96 to 98%. Micro hardness test showed that hybridization had a positive effect on the hardness and the hybrid nanocomposite micro hardness increased with increasing carbon nanotube content up to 20% that of Al/ WS2 nanocomposite. Compressive strength measurements showed that hybridization increased the final compressive strength up to 17%. Wear test showed the friction coefficient of the hybrid nanocomposite decreased up to 50% compared to the pure aluminum.

کلیدواژه‌ها [English]

  • Aluminum
  • Nanocomposite
  • Hybrid
  • Tungsten Disulfide
  • Carbon Nanotube

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