نوع مقاله : مقاله پژوهشی

نویسندگان

1 استادیار، دانشکده مهندسی مکانیک، دانشگاه علم و صنعت ایران، تهران، ایران

2 دانشجوی کارشناسی ارشد، دانشکده مهندسی مکانیک، دانشگاه علم و صنعت ایران، تهران، ایران

چکیده

در این مقاله، روشی جدید برای پرس داغ صفحات نازک معرفی می‌شود. روش قدیمی پرس داغ با وجود دستیابی به چگالی نزدیک به چگالی نظری، قیمت بسیار بالایی دارد. دستگاه معرفی‌شده در این مقاله، با حفظ مزیت دستیابی به چگالی نظری، قیمت ساخت و کارکرد پایینی دارد و برای انجام پرس تنها به یک کوره الکتریکی معمولی نیاز دارد. با وجود تمام این مزایا، محدودیت این دستگاه آن است که تنها قابل استفاده برای ساخت صفحات نازک سرامیکی است. در این مقاله در ابتدا توضیح خلاصه‌ای در مورد کامپوزیت‌های زمینه سرامیکی داده می‌شود و تأثیر ترکیبات و روش ساخت بر خواص آن به بحث گذاشته می‌شود. سپس روش‌های شکل‌دهی پودر معرفی ‌شده و مزایا و معایب هرکدام به بررسی می‌شود. در ادامه پرس داغ انبساطی معرفی شده و مراحل ساخت و روش کار آن توضیح داده می‌شود. در پایان یک کامپوزیت زمینه سرامیکی استفاده شده و نتایج آن بررسی می‌شود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Modified hot pressing method for fabrication of ceramic matrix composites

نویسندگان [English]

  • habibollah akbari 1
  • reza partovy hamrah 2

1 Department of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

2 Department of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

چکیده [English]

This paper presents a Novel method for fabricating of thin ceramic plates. Although achieving nearly full density, the commercial hot pressing machine have extremely high price and upkeep cost. The device presented in this paper have lower cost and for hot pressing, needs just an ordinary electrical furnace. Despite all this benefits, it can just form thin ceramic plates. In this paper, initially a brief description about ceramic matrix composites (CMCs) is presented and the effect of formed components and forming methods on its properties is discussed. Then the powder forming methods with advantages and disadvantages is presented. In the next step the device (expansional hot pressing device) and its working method is introduced. And finally this device is used for forming of a special ceramic matrix composite and the mechanical and microscopic properties of the formed part is examined and the method proves to be useful for forming CMC

کلیدواژه‌ها [English]

  • Ceramic matrix composite
  • Hot press
  • Expansion hot press
  • Powder metal
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