Ultrahigh Oxidation Resistance and High Electrical Conductivity in Copper-Silver Powder

Jiaxiang Li, Yunping Li, Zhongchang Wang, Huakang Bian, Yuhang Hou, Fenglin Wang, Guofu Xu, Bin Liu, Yong Liu

Research output: Contribution to journalArticlepeer-review

26 Citations (Scopus)


The electrical conductivity of pure Cu powder is typically deteriorated at elevated temperatures due to the oxidation by forming non-conducting oxides on surface, while enhancing oxidation resistance via alloying is often accompanied by a drastic decline of electrical conductivity. Obtaining Cu powder with both a high electrical conductivity and a high oxidation resistance represents one of the key challenges in developing next-generation electrical transferring powder. Here, we fabricate a Cu-Ag powder with a continuous Ag network along grain boundaries of Cu particles and demonstrate that this new structure can inhibit the preferential oxidation in grain boundaries at elevated temperatures. As a result, the Cu-Ag powder displays considerably high electrical conductivity and high oxidation resistance up to approximately 300 °C, which are markedly higher than that of pure Cu powder. This study paves a new pathway for developing novel Cu powders with much enhanced electrical conductivity and oxidation resistance in service.

Original languageEnglish
Article number39650
JournalScientific reports
Publication statusPublished - 2016 Dec 22

ASJC Scopus subject areas

  • General


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