نوع مقاله : مقاله پژوهشی

نویسندگان

1 پژوهشکده رآکتور و ایمنی هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران- ایران

2 دانشکده فیزیک، دانشگاه پیام نور، صندوق پستی: 1953633511، تهران- ایران

چکیده

در پژوهش حاضر ویژگی‌های ساختاری، مکانیکی و هسته‌ای دو نوع کامپوزیت زمینه پلیمری و زمینه فلزی حاوی ذرات کاربید بور مورد بررسی تجربی قرار گرفت. بر اساس آزمون عبور نوترون، میزان عبور نوترون کم‌­تری در پلیمر BPAER تقویت‌شده با نانوذرات C4B در مقایسه با کامپوزیت تقویت‌شده با میکروذرات به‌دست آمد. نمودارهای تنش- کرنش به‌دست آمده از آزمون کشش، بهبود ویژگی‌های مکانیکی کامپوزیت رزین اپوکسی تقویت‌شده با نانوذرات C4B در مقایسه با میکروذرات را نشان می‌دهد. هم­‌چنین آزمون عبور تابش نوترون، بهبود مشخصه‌ی هسته‌ای نانوکامپوزیت C4B-Al را در مقایسه با میکروکامپوزیت C4B-Al نشان می‌دهد. از سوی دیگر مشاهده شد چگالی این نانوکامپوزیت مقدار بیش­‌تری نسبت به میکروکامپوزیت داشته و صرف‌نظر از اندازه و مقدار افزودن ذرات کاربید، چگالی تمام نمونه‌های کامپوزیتی کم­‌تر از آلومینیم است. با افزایش درصد فاز تقویت‌کننده سختی کامپوزیت نیز افزایش یافته است که این افزایش در نمونه‌های نانوکامپوزیت بسیار بیش­‌تر از نمونه‌های میکرو بوده است.

کلیدواژه‌ها

عنوان مقاله [English]

Experimental study of structural, mechanical, and nuclear properties of neutron absorber composites containing boron

نویسندگان [English]

  • M. Asadi Asadabad 1
  • M.J. Nasr Isfani 2
  • F. Payami 1

1 Reactor and Nuclear Safety Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 11365-8486, Tehran - Iran

2 Department of Physics, Payame Noor University, P.O.BOX: 1953633511, Tehran - Iran

چکیده [English]

The present study investigated the structural, mechanical, and nuclear properties of two types of polymeric and metallic composites containing boron carbide particles. The neutron transmission test obtained lower neutron transmission in BPAER reinforced with B4C nanoparticles compared to the microparticle-reinforced composite. The stress-strain diagrams obtained from the tensile test show the improvement of the mechanical properties of the epoxy resin composite reinforced with B4C nanoparticles compared to the microparticles. The neutron transmission test also indicates an improvement in the nuclear properties of the Al-B4C nanocomposite compared to the Al-B4C micro composite. On the other hand, the density of this nanocomposite shows an increase compared to the micro composite. Also, regardless of the size and amount of carbide particles added, the density of all composite samples was lower than that of aluminum. Also, the hardness of the composite increased with increasing the amount of reinforcing phase, which was more in the nanocomposite samples than in the micro composite samples.

کلیدواژه‌ها [English]

  • Composite
  • Boron carbide
  • Neutron transmission
  • Nanoparticles
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