مهندسی متالورژی

مهندسی متالورژی

سنتز نانوذراتAlMgB₁₄ :تأثیر نوع پیش‌ماده و روش تولید بر بازدهی محصول

نوع مقاله : مقاله پژوهشی

نویسندگان
دانشکده مهندسی و علم مواد، آزمایشگاه مواد پیشرفته و نانوتکنولوژی، دانشگاه صنعتی خواجه نصیرالدین طوسی
10.22076/me.2026.742729
چکیده
ترکیب بین‌فلزی بوریدآلومینیوم منیزیم AlMgB₁₄ به دلیل سختی بالا، چگالی پایین، ضریب اصطکاک کم و خواص فیزیکی و الکتریکی مطلوب، از مواد مورد توجه برای استفاده در کاربردهای مختلف مهندسی بشمار می­رود. در پژوهش حاضر، با هدف بررسی مسیر مناسب برای سنتز این ترکیب با بازدهی بالا و تولید نانوذرات آن، دو گروه شامل الف) عناصر اولیه بور، آلومینیوم و منیزیم و ب) ترکیب بین‌فلزی Al₁₂Mg₁₇ و بور ، بعنوان پیش­ماده مورد بررسی و مقایسه قرار گرفتند. نتایج نشان داد که استفاده از ترکیب بین‌فلزی Al₁₂Mg₁₇به‌عنوان پیش‌ماده، در مقایسه با استفاده مستقیم از عناصر آلومینیوم و منیزیم، مسیر مؤثرتری برای تشکیل AlMgB₁₄فراهم می‌کند و بازدهی محصول نهایی را به حدود ۹۲ درصد می‌رساند. محصول حاصل از این مسیر دارای سختی GPa 28 و چگالی g/cm³ 68/2 بود که تطابق مناسبی با مقادیر نظری نشان داد. بر اساس نتایج حاصل، محصول سنتزشده با استفاده از پیش‌ماده بین‌فلزی به‌عنوان ترکیب منتخب برای ادامه فرآیند تولید نانوذرات انتخاب شد. در ادامه، با استفاده از آسیاب‌کاری مکانیکی پرانرژی، از نمونه بالک AlMgB₁₄، نانوذرات این ترکیب با میانگین اندازه n 4/32 تولید شد. نتایج این پژوهش نشان داد که انتخاب مناسب پیش‌ماده در کنار به‌کارگیری فرآیندهای متوالی سنتز حالت جامد و آسیاب‌کاری مکانیکی، می‌تواند مسیر مؤثری برای تولید AlMgB₁₄ با بازده بالا و اندازه نانومتری فراهم کند.
کلیدواژه‌ها

عنوان مقاله English

Synthesis of AlMgB₁₄ Nanoparticles: Effect of Precursor Type and Processing Route on the Synthesis Yield

نویسندگان English

Elham Bakhshizade
Mehdi Khodaei
Faculty of Materials Science and Engineering, Advanced Materials and Nanotechnology Research Laboratory, K. N. Toosi University of Technology
چکیده English

Aluminum magnesium boride (AlMgB₁₄) is an intermetallic compound that has attracted considerable attention for various engineering applications owing to its high hardness, low density, low coefficient of friction, and desirable physical and electrical properties. In the present study, two precursor systems were investigated and compared to identify an effective route for the high-yield synthesis of AlMgB₁₄ and subsequent production of its nanoparticles: (a) elemental boron, aluminum, and magnesium, and (b) Al₁₂Mg₁₇ intermetallic compound combined with boron. The results demonstrated that the use of Al₁₂Mg₁₇ as a precursor provided a more effective route for the formation of AlMgB₁₄ than the direct use of elemental aluminum and magnesium, resulting in a final product yield of 92%. The product synthesized through this route exhibited a hardness of approximately 28 GPa and a density of 2.68 g/cm³, both of which were in good agreement with the corresponding theoretical values. Based on these results, the product synthesized using the intermetallic precursor was selected for subsequent nanoparticle production. High-energy mechanical milling of the bulk AlMgB₁₄ subsequently yielded nanoparticles with a mean particle size of 32.4 nm. The findings demonstrate that the appropriate selection of precursors, combined with sequential solid-state synthesis and mechanical milling processes, provides an effective route for the high-yield production of AlMgB₁₄ with nanoscale dimensions.

کلیدواژه‌ها English

Aluminum magnesium boride
Nanoparticles
High-energy ball milling
Spark plasma sintering
Solid-state synthesis
Intermetallic compound
Superhard materials
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انتشار آنلاین از 18 مهر 1405