AI Article Synopsis
- Researchers developed Cu-xBi-10Sn alloys to replace toxic Pb in Cu-Sn alloys while maintaining high friction performance.
- Bi was found to distribute in bands on the alloy's microstructure, influencing its mechanical properties as Bi content varied.
- The optimal Bi content was 7 wt.%, which yielded maximum hardness and tensile strength similar to Cu-10Pb-10Sn, while also showcasing superior wear resistance under lubrication.
Article Abstract
To reduce the use of the toxic Pb element in the Cu-Sn alloy with high friction performance, Cu-xBi-10Sn alloys with different Bi contents were prepared by gravity casting, and the effect of Bi content on the microstructure, mechanical properties and wear property of Cu-Sn alloys were studied. The results showed that the Bi element was distributed in bands or long strips on the dendritic arms and did not form compounds with other elements. With the increase in Bi content, the hardness and tensile strength of Cu-xBi-10Sn alloys present a trend of increasing first and then decreasing. When the Bi content was 7 wt.%, the maximum hardness value was obtained, and the ultimate tensile strength was close to that of Cu-10Pb-10Sn alloy. Compared with Cu-10Pb-10Sn alloy, Cu-7Bi-10Sn alloy also possessed better friction reduction and wear resistance under the oil lubrication condition.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10608447 | PMC |
| http://dx.doi.org/10.3390/ma16206658 | DOI Listing |
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