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The sintering mixed powders behavior of triuranium octoxide in uranium dioxide

机译：二氧化铀苷氧化锆氧化锆的烧结混合粉末

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摘要

The main aim of this research was to study the sintering behavior in hydrogen atmosphere of mixed powders of triuranium octoxide (U_3O_8) powder in dioxide uranium (UO_2) powders. By cold pressing the green pellets of mixed powders of triuranium octoxide in hyper stoichiometric uranium dioxide has density over 40 % UO_2 theoretical density (TD). The sintered pellets had a height diameter ratio (H / D) over one and oxygen uranium ratio (O/U) near stoichiometry of uranium dioxide (UO_2). The densities of sintered pellets were up to 97% of uranium dioxide theoretical density. The proposed treatment of sintering are function of green pellets density. Increasing the proportion of triuranium octoxide leads to a decrease in the density of the sinter pellets. The pellets made by 100 % of triuranium octoxide not resist to proposed sintering treatment. The metallographic analysis show uniform grains for sinter pellets made by the 30 % mixture of triuranium octoxide in uranium dioxide. This UO_2 sinter pellets are without surface defects.
机译：该研究的主要目的是研究二氧化铀铀（UO_2）粉末混合粉末混合粉末（UO_2）粉末的混合粉末氢气氛中的烧结行为。通过冷压制碘化铀在二氧化铀的碘氧化钠的混合粉末的绿色颗粒具有超过40％UO_2理论密度（TD）的密度。烧结粒料在二氧化铀（UO_2）的化学计量附近的一个和氧铀比（O / U）上具有高度直径比（H / D）。烧结粒料的密度高达二氧化铀理论密度的97％。所提出的烧结处理是绿色颗粒密度的作用。增加碘氧化锆的比例导致烧结粒料密度的降低。通过100％的碘氧化锑制成的粒料不抵抗提出的烧结处理。金相分析显示通过二氧化铀在二氧化铀中的30％混合物制备的烧结粒料均匀颗粒。该UO_2烧结颗粒没有表面缺陷。

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