本文選題：Ag-In-Cd合金　切入點(diǎn)：堆內(nèi)輻照　出處：《原子能科學(xué)技術(shù)》2015年11期

【摘要】：Ag-In-Cd合金在核電站壓水堆控制棒中廣泛使用,其輻照腫脹行為是評(píng)價(jià)Ag-In-Cd控制棒使用壽命的關(guān)鍵因素。本文通過(guò)制備不同成分的模擬合金,來(lái)模擬Ag-In-Cd合金在堆內(nèi)輻照后的成分變化,分析合金的密度及微觀組織特點(diǎn)。結(jié)果發(fā)現(xiàn),當(dāng)Ag含量低至77.5%(質(zhì)量分?jǐn)?shù))時(shí),合金會(huì)分解為fcc和hcp兩相,fcc相中貧Sn高Ag,hcp相中富Sn低Ag。當(dāng)Ag含量在55%~61%之間時(shí),合金以hcp單相存在。由實(shí)測(cè)的密度擬合出了合金密度隨成分變化的關(guān)系式。此結(jié)果對(duì)于理解和掌握Ag-InCd合金的輻照腫脹行為有重要意義。
[Abstract]:Ag-In-Cd alloy is widely used in PWR control rod of nuclear power station, and its radiation swelling behavior is the key factor to evaluate the service life of Ag-In-Cd control rod. In this paper, the composition changes of Ag-In-Cd alloy after irradiation are simulated by preparing simulated alloy with different composition. The density and microstructure characteristics of the alloy were analyzed. It was found that when Ag content was as low as 77.5% (mass fraction), the alloy would be decomposed into Sn-poor high AgHCP phase in fcc and hcp phase and Sn-rich high AgHCP phase and low Ag content in Ag phase, and when Ag content was between 55% and 61%, the alloy would be decomposed into Sn-rich and low-AgHCP phases. The alloy exists as a single phase of hcp. The relationship between the density of the alloy and the composition of the alloy is fitted from the measured density. This result is of great significance for understanding and mastering the radiation swelling behavior of the Ag-InCd alloy.
【作者單位】： 中國(guó)核動(dòng)力研究設(shè)計(jì)院反應(yīng)堆燃料及材料重點(diǎn)實(shí)驗(yàn)室;
【基金】：大型先進(jìn)壓水堆核電站重大專項(xiàng)資助項(xiàng)目(2011ZX06004-016-003)
【分類(lèi)號(hào)】：TL351.5;TG146.32

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本文編號(hào)：1681038