توالی و سازوکار واکنش ها در دستگاه ایلمِنایت و آلومینیم

نوع مقاله : علمی و پژوهشی

نویسندگان

• راضیه خوشحال ¹
• محمدعلی بوترابی ²
• منصور سلطاینه ²

¹ دانشگاه علم و صنعت ایران

² علم و صنعت ایران

10.22067/ma.v26i2.31896

چکیده

در این تحقیق، واکنش های بین ایلمِنایت و آلومینیم به‌منظور تعیین اوّلین مرحله از واکنش های دستگاه ایلمِنایت، آلومینیم و گرافیت با هدف تولید مواد مرکب Al2O3-TiC/Fe بررسی شده است. برای این‌منظور، ایلمِنایت خالص تهیّه شد. سپس، ایلمِنایت و آلومینیم با نسبت مولی 1 به 2 مخلوط شدند و پس از فشرده شدن، در دماهای بحرانی به‌دست آمده از آزمون DTA عملیّات حرارتی شدند. مشخص شد که ابتدا آلومینیم ذوب می شود و در ادامه، با ایلمِنایت وارد واکنش می شود. در مراحل ابتدایی واکنش ایلمِنایت و آلومینیم، آهن، تیتانیم و آلومینا تشکیل می‌شوند. با گذشت زمان، ذرات کروی Fe2Ti در ساختار زمینه‌ی آلومینا و تیتانیا ایجاد می شود.

کلیدواژه‌ها

• ایلمنایت
• آلومینیم
• کامپوزیت هایFe-TiC/Al2O3

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عنوان مقاله [English]

Sequence and Mechanism of Reactions in Ilmenite and Aluminum System

نویسندگان [English]

• Razieh Khoshhal ¹
• Mohammad Ali Boutorabi ²
• Mansour Soltanieh ²

¹ Iran University of Science and Technology

² School of Metallurgy and Materials Engineering, Iran University of Science and Technology, 16846-13114, Tehran, Iran.

چکیده [English]

In this research, the first step of reactions in ilmenite-aluminum-graphite system for the formation of Al2O3-TiC/Fe composites was investigated by the study of the binary system of aluminum and ilmenite. The milled and pressed samples prepared by the synthesized ilmenite and aluminum powders having the molar ratio of 1:2 were heat treated at the critical temperatures obtained from DTA analysis. It was found that a transient Fe phase is formed along with TiO2. The spherical shaped Fe2Ti phase was then formed in the matrix consisting of TiO2 and Al2O3.

کلیدواژه‌ها [English]

• Ilmenite
• Aluminum
• Fe-TiC/Al2O3 composites

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