Microstructure modulation realizing high performance of Pb-Ag alloys by controlled solidification temperature

IF 2.4 4区化学 Q3 CHEMISTRY, PHYSICAL Ionics Pub Date : 2024-08-14 DOI:10.1007/s11581-024-05725-9

Xinxin Zhou, XiaoQiang Yu, Cheng Jiang, Buming Chen, Hui Huang, Jun Guo, Chao Gao, Ruidong Xu, Zhongcheng Guo

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Abstract

The microstructure of the Pb-Ag alloy is vital to its mechanical, corrosion, and electrochemical properties. In this paper, heat preservation mold is used to control the temperature of cast lead alloy, realizing the regulation of the microstructure of Pb-Ag alloy. The effects of the surface microstructure and the Ag distribution on the mechanical, corrosion-resistant, and electrochemical properties of lead alloy are investigated. The results show that the heat preservation treatment effectively enhances the longitudinal tissue uniformity of the alloy and optimizes the distribution of Ag in the alloy. The alloy shows the best comprehensive performance as the heat preservation temperature reaches 50℃ due to the uniform size of the metallographic structure and the most uniformly distributed Ag. The low-temperature heat preservation treatment (12℃) refines the middle and bottom grains of the alloy and enhances the mechanical properties of the alloy. However, the increased uniform grain size and Ag distribution at the longitudinal level of the alloy led to a decrease in the electrochemical properties and corrosion resistance.

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通过控制凝固温度实现高性能铅银合金的微观结构调控

铅银合金的微观结构对其机械、腐蚀和电化学性能至关重要。本文利用保温模具控制铸铅合金的温度，实现了对铅银合金微观结构的调控。研究了铅合金表面微观结构和Ag分布对其力学性能、耐腐蚀性能和电化学性能的影响。结果表明，保温处理有效地提高了合金的纵向组织均匀性，优化了合金中的Ag分布。当保温温度达到 50℃时，合金的金相组织尺寸均匀，Ag 的分布也最均匀，因此合金的综合性能最好。低温保温处理（12℃）细化了合金的中间和底部晶粒，提高了合金的机械性能。然而，合金纵向均匀晶粒尺寸和 Ag 分布的增加导致了电化学性能和耐腐蚀性能的下降。

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来源期刊

Ionics 化学-电化学

CiteScore

5.30

自引率

7.10%

发文量

427

审稿时长

2.2 months

期刊介绍： Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.