سنتز خودپیشرونده دما بالای کاربید تیتانیم آلومینیم به کمک فعال‌سازی مکانیکی

نوع مقاله : مقاله پژوهشی

نویسنده

پژوهشکده نیمه هادی ها، پژوهشگاه مواد و انرژی، کرج، ایران

چکیده

سنتز خودپیشرونده دما بالای کاربید تیتانیم آلومینیم به کمک فعال‌سازی مکانیکی
نویسندگان: مریم اخلاقی، سیدعلی طیبی‌فرد، اسمعیل صلاحی، مهدی شاهدی اصل، گرت اشمیت
نویسنده مسیول: مریم اخلاقی
در پژوهش حاضر، سنتز ترکیب سه‌تایی Ti3AlC2 با استفاده از مواد اولیه تیتانیم، آلومینیم و گرافیت به روش سنتز خودپیشرونده دما بالای فعال‌شده مکانیکی انجام شد. سنتز این ترکیب در مد انفجار حرارتی با استفاده از مواد اولیه به نسبت Ti:Al:C=3:1:2 در کوره تیوبی انجام گرفت و سازوکار تشکیل این ترکیب بررسی شد. مشخصه‌یابی محصول سنتز به کمک گرماسنجی افتراقی، میکروسکوپ‌های الکترونی روبشی و عبوری و پراش پرتو ایکس انجام شد. هر چند ترکیب Ti3AlC2، به‌عنوان فاز اصلی محصول سنتز شناسایی شد، تشکیل محصول جانبی TiC در کنار فاز اصلی نیز اجتناب ناپذیر بود. بررسی‌ها نشان داد که تشکیل ترکیب‌های TiC و TiAl نقش اساسی در سنتز خودپیشرونده دما بالای فاز Ti3AlC2 دارد.
کلیدواژه: فعال‌سازی مکانیکی، سنتز خودپیشرونده دما بالا، فاز مکس، Ti3AlC2.

کلیدواژه‌ها

عنوان مقاله [English]

Synthesis of Ti3AlC2 MAX phase by MASHS

نویسنده [English]

  • Maryam Akhlaghi
Semiconductors Department, Materials and Energy Research Center (MERC), Karaj, Iran
چکیده [English]

Synthesis of Ti3AlC2 MAX phase by MASHS
Maryam Akhlaghia, Seyed Ali Tayebifarda, Esmaeil Salahib, Mehdi Shahedi Aslc, Gert Schmidtd
Titanium aluminum carbide was prepared employing mechanically activated self-propagating high-temperature synthesis process. The formation mechanism of Ti3AlC2 MAX phase using elemental titanium, aluminum and carbon (graphite) powders synthesized via two different preparation methods, wave propagation and thermal explosion synthesis techniques, were investigated. The combustion reaction products were characterized by differential thermal analysis, scanning electron microscopy and X-ray diffraction analysis. Although Ti3AlC2 was recognized as the dominant synthesis product, in both techniques, the formation of TiC was also verified as a byproduct. The MAX phase produced in the tubular furnace (thermal explosion mode) was purer than that synthesized in the reaction chamber (wave propagation mode). The results disclosed that the formation of TiC and TiAl compounds have significant roles on the combustion synthesis of Ti3AlC2 MAX phase.
Keywords: Mechanical activation, Self-propagating high-temperature synthesis, MAX phase, Ti3AlC2.

کلیدواژه‌ها [English]

  • Mechanical activation
  • Self-propagating high-temperature synthesis
  • MAX phase
  • Ti3AlC2

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  • تاریخ دریافت: 28 آذر 1397
  • تاریخ بازنگری: 13 بهمن 1397
  • تاریخ پذیرش: 21 فروردین 1398

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