YENİDEN SİNTERLENEN UO2 PELLETLERİNİN MEKANİK ÖZELLİKLERİNİN MİKRO SERTLİK METODUYLA İNCELENMESİ

Year 2019, Volume: 31 Issue: 1, 24 - 29, 26.06.2019

Sevgi Akbal , Ahmet Yaylı , Ferhan Can Esra Keşaf

Abstract

Bu çalışmanın amacı, mikro
sertlik testi kullanılarak re-sinter UO₂ yakıt peletlerinin mekanik özelliklerinin
incelenmesidir. UO₂ yakıt peletleri toz metalurjisi yolu ile
üretilmiştir. Ar +% 5 H₂ atmosferinde 4 saat sinterleme ile üretilen
UO₂ peletleri, termal kararlılık testi için Ar +% 5 H₂
atmosferinde 24 saat boyunca 1700 ⁰C'de yeniden sinterlemeye tabi
tutulmuştur. Termal kararlılık testinin UO₂ peletlerinin mekanik ve
mikroyapı özelliklerine etkisi tartışılmıştır.  

Keywords

UO2, yeniden sinterleme, termal kararlılık testi, mikrosertlik, mekanik özellikler, mikroyapı

INVESTIGATION OF MECHANICAL PROPERTIES RESINTERED UO2 PELLETS BY MİCRO HARDNESS METHOD

Abstract

Thermal stability test
(re-sintering test) of the nuclear fuel is one of the most important
characterization steps before loading to the reactor. The purpose of this study
is investigation of mechanical properties of re-sintered UO₂ pellets using micro hardness test method. UO₂ fuel pellets were produced by
powder metallurgical route.  UO₂
pellets sintered for 4 hours at Ar + 5% H₂ atmosphere were subjected
to re-sintering at 1700 ⁰ C for 24 hours in Ar + 5% H₂
atmosphere for thermal stability test. Re-sintering effects
on the mechanical properties and microstructure of UO₂ pellets were investigated.

Keywords

UO2, re-sintering, thermal stability test, micro hardness, mechanical properties, microstructure

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