Preferential oxidation of intermetallic compounds in Ag-2Sn-4La alloy

Preferential oxidation of intermetallic compounds in Ag-2Sn-4La alloy
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Ag-2Sn-4La合金中金属间化合物的优先氧化

DOI:
10.1016/j.corsci.2018.08.017
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发表时间:
2018-10
期刊:
影响因子:
8.3
通讯作者:
Danqing Yi
Danqing Yi
中科院分区:
材料科学1区
文献类型:
--
作者:
Qian Zhao;Chunping Wu;Huiqun Liu;Nana Li;Yong Jiang;Danqing Yi

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微量La对Ag-Sn合金氧化的影响已被广泛讨论。在这里,我们提出了一个详细的研究,以评估潜在的影响,高含量的La对Ag-Sn合金的氧化。发现Ag-2Sn-4La合金中存在两种金属间化合物。金属间化合物发生优先氧化,氧化物的析出顺序为La 2 O3、La 2Sn 2 O 7和SnO 2。在此基础上,我们认为高含量的La会加速Ag-Sn合金的氧化,但不利于Ag-SnO 2电触头材料的组织设计。
The influence of trace La on the oxidation of Ag-Sn alloy has been widely discussed. Here we present a detailed study for evaluating the potential impact of high content La for the oxidation of Ag-Sn alloy. We found that there are two kinds of intermetallic compounds in Ag-2Sn-4La alloy. The intermetallic compounds underwent a preferential oxidation, and the corresponded precipitation sequence of oxides was La2O3, La2Sn2O7and SnO2. Based on the acquired insight, we suggest that high content La can accelerate the oxidation of Ag-Sn alloy oxidation but is not beneficial for the microstructure design of Ag-SnO2electrical contact material.
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