بررسی تاثیر مقدار تقویت کننده بر روی استحکام فشاری نانو کامپوزیت زمینه آلیاژ آلومینیوم A380 تقویت شده با نانو ذرات کاربید سیلیسیم

نوع مقاله : علمی و پژوهشی

نویسندگان

• علی محمدی ¹
• محمد علی پور ²

¹ گروه مهندسی مواد،دانشکده مکانیک، دانشگاه تبریز،ایران

² گروه مهندسی مواد، دانشکده مکانیک، دانشگاه تبریز، ایران

10.22067/jmme.2022.77789.1064

چکیده

در این مقاله ریز ساختار و  استحکام فشاری آلیاژ آلومینیوم A380 با افزودن نانو ذرات SiC (Silicon carbide) مورد بررسی قرار گرفت. پودر آلومینیوم A380  و نانوذرات SiC با مقدارهای (0 ،5/0 ،1 و 2 درصد وزنی) در یک دستگاه آسیاب گلوله‌ای سیاره‌ای در اتمسفر آرگون به مدت 10 ساعت آسیاب شدند. نسبت وزن توپ به پودر 1:10 و سرعت چرخش روی 250 دور بر دقیقه تعیین شد. پس از فرآیند آسیاب، از پرس گرم برای تولید نمونه‌ها استفاده شد، محصولات از طریق قالب گرافیتی به قطر 15 میلی متر همزمان  با سرعت گرمایش 10 درجه سانتیگراد بر دقیقه تا دمای پخت نهایی 510 درجه سانتیگراد با زمان نگهداری 30 دقیقه تحت خلا در فشار 50 مگاپاسکال در دستگاه پرس گرم قرار گرفت. ریز ساختار و فاز های تشکیل شده نمونه‌های تولید شده با استفاده از میکروسکوپ الکترون روبشی(SEM)   (Scanning electron microscope) و پراش اشعه‌ی ایکس (XRD) (X-ray diffraction) مورد بررسی قرار گرفت. برای آزمایش استحکام فشاری از دستگاه آزمایش  کشش/ فشار یونیورسال(UTM)  (universal testing machine) استفاده شد. مشاهده شد با افزایش نانو ذرات SiC اگلومره شدن اتفاق افتادکه باعث کاهش خواص مکانیکی شد. بهترین چگالی و استحکام فشاری نمونه‌ها مربوط به آلیاژ آلومینیوم با 5/0 درصد وزنی نانو ذراتSiC   به دست آمد همچنین به علت پایین بودن دمای زینترینگ، تجزیه SiC اتفاق نیفتاد و ترکیب بین فلزی آلومینیوم با کربن یا آلومینیوم با سیلیسیم تشکیل نشد.

کلیدواژه‌ها

• آلیاژ آلومینیوم
• کاربید سیلیسیم
• کامپوزیت
• متالوژی پودر
• استحکام فشاری

موضوعات

• متالورژی مکانیکی

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عنوان مقاله [English]

Investigating the effect of the amount of reinforcement on the compressive strength of A380 aluminum alloy nanocomposite reinforced with silicon carbide nanoparticles

نویسندگان [English]

• Ali Mohammadi ¹
• Mohammad Alipour ²

¹ Faculty of Mechanical engineering, Department of Materials Engineering, University of Tabriz, Iran

² Faculty of Mechanical engineering, Department of Materials Engineering, University of Tabriz, Iran

چکیده [English]

In this paper, the microstructure and compressive strength of A380 aluminum alloy were investigated by adding SiC nanoparticles. A380 aluminum powder and SiC nanoparticles with values (0, 0.5, 1, and 2% by weight) were ground in a planetary ball mill in an argon atmosphere for 10 hours. The ball weight ratio to powder was 10:1, and the rotation speed was set at 250 rpm. After the milling process, a hot press produced the samples. The products were produced through a graphite mold with a 15 mm diameter at a 10 °C heating rate per minute to a final 510 °C sintering temperature with a 30 minutes holding time under vacuum conditions. In addition, a pressure of 50 MPa was placed in the hot press machine. The microstructure and formed phases of the product samples were examined using scanning electron microscopy (SEM) and X-ray diffraction (XRD). Moreover, a universal testing machine (UTM) was used to test the compressive strength. It was observed that agglomeration occurred with the increase of SiC nanoparticles, which decreased the mechanical properties. The samples' best density and compressive strength were related to aluminum alloy with 0.5% by weight of SiC nanoparticle. Furthermore, due to the low sintering temperature, SiC decomposition did not occur. Besides, the intermetallic compound of aluminum with carbon or aluminum with silicon was not formed.

کلیدواژه‌ها [English]

• Aluminum alloy
• Silicon carbide
• Composite
• Powder metallurgy
• Compressive strength

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