Ag<sub>15</sub>Cu<sub>85</sub>二元合金高温氧化行为对去合金机制的影响

doi:10.11896/cldb.20110140

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Abstract Recently, nano-porous materials have become a research hotspot in the fields of photocatalysis and energy storage. In this work, high temperature oxidation and dealloying process were combined to tune the fabrication process.The influence on Ag₁₅Cu₈₅ binary ribbon dea-lloying mechanism triggered by high temperature oxidation behavior was researched. There was a slice of 2D micropores, nanoparticles and island platforms on the surface of the precursor ribbon when high temperature oxidation was executed at 650—750 ℃ with the duration of 1—5 min. Similar micro morphology was observed at different duration of oxidation behavior. Compared with as cast precursor alloy dealloying process (60 ℃, 5%HNO₃, 1.5 h), nano-porous structure fabricated time by oxidized simple dealloying process (45 ℃, 5%HNO₃, 15 min) was 1/6 of as-cast one under lower temperature. Additionally, the ligament/pore size of fabricated nano-porous silver was larger than that of as-cast one. Dealloying process was greatly accelerated by oxidation behavior. Generally, specimens weathered high temperature oxidation could make a huge effect on the dealloying process. The reactant changed from α-Cu(Ag) solid solution to mixed product including α-Cu(Ag) and copper oxide. Moreover, as the oxidation products participated in the dealloying process, the procedure of nonnoble metal dissolve were promoted.

Key words： nano-porous silver high temperature oxidation microstructure atom diffusion dealloying

Published: 25 January 2022 Online: 2022-01-26

CLC number:

TG166.2

Fund:National Natural Science Foundation of China(51574147), the Natural Science Foundation of Liaoning (201602474)and Scientific Research Project of the Education Department of Liaoning (2021-LGKZ0388).

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	ZHAO Zijun
	WANG Xu

Cite this article:

ZHAO Zijun,WANG Xu. Impact on Ag₁₅Cu₈₅ Binary Alloy Ribbon Dealloying Mechanism Caused by High Temperature Oxidation[J]. Materials Reports, 2022, 36(2): 20110140-6.

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http://www.mater-rep.com/EN/10.11896/cldb.20110140 OR http://www.mater-rep.com/EN/Y2022/V36/I2/20110140

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