耐腐蚀铝合金 含量对Zr-4合金在LiOH水溶液中耐腐蚀性能的影响.docVIP

耐腐蚀铝合金 含量对Zr-4合金在LiOH水溶液中耐腐蚀性能的影响 第?23?卷第?6?期 Vol.23?No.6? 中国有色金属学报? The?Chinese?Journal?of?Nonferrous?Metals? 2013?年?6?月?June?2013? 文章编号：1004-0609(2013)06-1542-07? Ge?含量对?Zr-4?合金在?LiOH?水溶液中耐腐蚀性能的影响 张金龙?1,2?，谢兴飞?1,?2?，姚美意?1,2?，周邦新?1,2?，彭剑超?1,?2?，李 强?1,?2? (1.?上海大学 微结构重点实验室，上海?200444；? 2.?上海大学 材料研究所,?上海?200072)? 摘 要：采用堆外高压釜腐蚀试验研究添加0.1%?Ge和0.5%?Ge(质量分数)对Zr-4合金在360、0.01?mol/LLiOH?水溶液中耐腐蚀性能的影响，用TEM和EDS研究合金的显微组织和第二相成分。结果表明：与Zr-4合金相比， 添加Ge后合金的耐腐蚀性能显著提高，但随着Ge添加量的增加，对耐腐蚀性能的提高作用减弱。当Ge含量为?0.1%时，析出密排六方结构的?Zr(Fe,Cr)2?和?Zr(Fe,Cr,Ge)2?型第二相；当?Ge?含量达到?0.5%时，还会析出?Zr-Sn-Fe-Cr-Ge和尺寸较大的四方结构Zr3Ge型第二相， 添加Ge会使α-Zr基体中固溶的Sn含量降低。 固溶在α-Zr?中的?Ge?和尺寸较小的?Zr(Fe,Cr)2?、Zr(Fe,Cr,Ge)2?型第二相可以提高?Zr-4+xGe?合金的耐腐蚀性能；析出?Zr-Sn-Fe-Cr-Ge和尺寸较大的Zr3Ge第二相后会对耐腐蚀性能产生不利的影响。 关键词：Zr-4合金；Ge；耐腐蚀性能；显微组织 中图分类号：TG146.4? 文献标志码：A? Effect?of?Geaddition?on?corrosion?performance?of? Zr-4?alloy?in?lithiatedsolution? 1,?2?1,2?1,2?1,2?1,?2?1,?2? ZHANG?Jin-long?,?XIE?Xing-fei?,?YAO?Mei-yi?,?ZHOU?Bang-xin?,?PENGJian-chao?,LIQiang? (1.?Laboratory?for?Microstructures,?Shanghai?University,?Shanghai?200444,?China?? 2.?Institute?of?Materials,?Shanghai?University,?Shanghai?200072,?China)? Abstract:?In?order?to?investigate?the?effect?of?Ge?addition?on?the?corrosion?resistance?of?zircaloy-4?(Zr-4)?alloy,?the?corrosion?performance?of?Zr-4+xGe?(x=?0.1%,?0.5%,?mass?fraction)?was?studied?in?lithiated?solution?with?0.01?mol/L?LiOH?at?360?℃?by?out?reactor?autoclave?testing.?The?microstructures?of?the?alloys?and?the?compositions?of?the?second?phase?particles?(SPPs)?were?investigated?by?TEM?and?EDS.?The?results?show?that?compared?with?Zr-4?alloy,?the?corrosion?resistances?of?Zr-4+xGe?alloys?containing?0.1%?and?0.5%?Ge?are?markedly?improved,?while?the?corrosion?resistances?decrease?slightly?with?the?increase?of?Ge?addition.?The?addition?of?Ge?decreases?the?solid?solution?content?of?Sn?in?the?α-Zr?matrix.?When?the?Ge?content?is?0.1%,?the?second?phase?particles?precipitate?as?Zr(Fe,Cr)2?and?Zr(Fe,Cr,Ge)2?in?Zr-4+xGe?alloy.?When?the?Ge?content?re