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Cu在Zr-2.5Nb-0.5Cu合金及其腐蝕生成氧化膜中的存在形式
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國家自然科學(xué)基金（50871064）；上海市重點(diǎn)學(xué)科建設(shè)項(xiàng)目（S30107）資助


Existing Form of Cu in Zr-2.5Nb-0.5Cu Alloys and the Oxide Films during Corrosion Testing in SCW at 550 oC/25 MPa
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    摘要:

    用電子顯微鏡研究了合金元素Cu在Zr-2.5Nb-0.5Cu合金及其腐蝕生成氧化膜中的存在形式。合金基體中的元素Cu主要以四方結(jié)構(gòu)的CuZr2第二相形式存在，CuZr2相中會富集雜質(zhì)元素Fe。合金經(jīng)過550 ℃，25 MPa超臨界水條件深度腐蝕后，伴隨著合金基體發(fā)生的H致β相變，CuZr2第二相也發(fā)生了相消溶、擴(kuò)散及凝聚長大過程。在腐蝕生成的氧化膜中，合金元素Cu以非晶氧化物的形式存在于氧化鋯的晶界。

    Abstract:

    Scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM), equipped with an energy dispersive X-ray spectroscopy (EDS) were employed for examining the existing form of Cu in Zr-2.5Nb-0.5Cu alloys and the oxide films during corrosion testing in SCW (supercritical water) at 550 oC/25 MPa. In Zr-2.5Nb-0.5Cu alloy, Cu exists mainly in the form of tetragonal second phase CuZr2, rich in impurity element Fe. The CuZr2 are transferred and agglomerated with the β phase transformation of the alloy induced by hydrogen during the corrosion testing. In the form of amorphous cuprous oxide, Cu segregates on the grain boundaries of zirconia in the oxide films during corrosion testing.

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李 強(qiáng),梁 雪,周邦新,姚美意,彭劍超. Cu在Zr-2.5Nb-0.5Cu合金及其腐蝕生成氧化膜中的存在形式[J].稀有金屬材料與工程,2012,41(1):92~95.[Li Qiang, Liang Xue, Zhou Bangxin, Yao Meiyi, Peng Jianchao. Existing Form of Cu in Zr-2.5Nb-0.5Cu Alloys and the Oxide Films during Corrosion Testing in SCW at 550 oC/25 MPa[J]. Rare Metal Materials and Engineering,2012,41(1):92~95.]
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  • 收稿日期:2010-12-05
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