Al-Cu-Mg合金在氯化钠溶液浸泡过程中萌生于单个和簇状金属间化合物粒子的局部溶解（英文）

发布时间：2018-03-05 13:41

本文选题：铝合金　切入点：金属间化合物粒子　出处：《Transactions of Nonferrous Metals Society of China》2016年11期 　论文类型：期刊论文

【摘要】：为了深刻理解AA2024-T3铝合金暴露在含氯水介质中金属间化合物相的响应方式,运用扫描电镜获得腐蚀试验前后合金表面的形貌信息,进行能谱分析确定金属间化合物粒子的成分变化,使用原子力显微镜检测金属间化合物相电化学反应所引起的高度变化,并对去合金金化的Al_2CuMg粒子及其周边区域进行透射电镜分析。研究发现,去合金化Al_2CuMg粒子为由5~20 nm大小的体心立方铜粒子组成的多孔多晶体结构;在去合金化早期,铝基体就开始在Al_2CuMg粒子周边出现沟槽状腐蚀;Al-Cu-Fe-Mn-(Si)粒子周边沟槽状腐蚀的发展不均匀且比Al_2CuMg去合金化需要更长时间萌生;由Al_2CuMg和Al_2Cu组成的粒子簇的局部腐蚀主要与Al_2CuMg粒子相关。
[Abstract]:In order to deeply understand the AA2024-T3 Aluminum Alloy exposure to chlorinated water medium intermetallic phase response way, using scanning electron microscopy to obtain information on the surface of the alloy morphology before and after corrosion test, energy spectrum analysis to determine the composition change of intermetallic particles, height change caused by using atomic force microscope, intermetallic compound and electrochemical reaction. Al_2CuMg to the gold particles on the alloy and its surrounding area by TEM analysis. The study found that the porous polycrystalline structure of BCC Cu particles to alloying Al_2CuMg particles by 5~20 nm size; in dealloy early, the aluminum matrix began to appear in the peripheral groove corrosion of Al_2CuMg particles (Si Al-Cu-Fe-Mn-; the development of the surrounding particles) groove corrosion is not uniform and the ratio of Al_2CuMg dealloy need longer time initiation; consisting of Al_2CuMg and Al_2Cu particles The local corrosion of the subclusters is mainly related to the Al_2CuMg particles.

【作者单位】：中航工业北京航空材料研究院航空材料先进腐蚀与防护航空科技重点实验室;School
【基金】：Project(51201157)supported by the National Natural Science Foundation of China Project(H052013A003)supported by the National Defense Technology Foundation,China Project supported by the UK-ESPRC LATEST2 Program
【分类号】：TG146.21;TG174.3

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