Tailoring Cu nano Bi self-lubricating alloy material by shift-speed ball milling flake powder metallurgy

A novel method for preparing lead-free Cu nano Bi (CNB) alloy materials by nano Bi powder and shift-speed ball milling (SSBM) flake powder metallurgy was proposed. To improve the mechanical and tribological properties of the alloy materials, the spherical CuSn10 powder was firstly extruded and shear...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2022-05, Vol.903, p.163747, Article 163747
Main Authors: Liu, Cong, Yin, Yanguo, Li, Congmin, Xu, Ming, Li, Rongrong, Chen, Qi
Format: Article
Language:English
Subjects:
Alloy powders
Antifriction
Ball milling
Cold welding
Copper
Cu nano Bi self-lubricating alloy
Extrusion rate
Flake powder metallurgy
Flakes
Green design and development
Lead free
Low speed
Mechanical alloying
Mechanical properties
Powder metallurgy
Self lubrication
Shift-speed ball milling
Spherical powders
Tribology
Wear resistance
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:A novel method for preparing lead-free Cu nano Bi (CNB) alloy materials by nano Bi powder and shift-speed ball milling (SSBM) flake powder metallurgy was proposed. To improve the mechanical and tribological properties of the alloy materials, the spherical CuSn10 powder was firstly extruded and sheared into flakes by low-speed ball milling (LSBM) in the SSBM system. Meanwhile, the nano Bi powder was evenly dispersed and coated on the CuSn10 flakes. The mechanical alloying between mixed powders and the cold welding of flake CuSn10 flakes containing nano Bi into layered particles were then realized through short-time high-speed ball milling (HSBM) in the SSBM system. While promoting the uniform dispersion of lubricating phase Bi, the surface area of matrix CuSn10 flake was increased so as to achieve better combination of CuSn10 matrix in the material. Results show that the mechanical properties of the CNB material prepared through nano Bi powder and SSBM flake powder metallurgy improved compared with the Cu-Bi material prepared by HSBM. In addition, the antifriction and wear resistance improved by 30% and 80%, respectively. •Lead free Cu-Bi materials were prepared by nano Bi and shift-speed ball milling technology.•Cu-Bi material prepared by nano Bi particles could replace CuPb alloy.•The evolution of Cu-Bi mixed powder during shift-speed ball milling was analyzed.•The mechanism of improving the properties of Cu nano Bi alloy by shift-speed ball milling was analyzed.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2022.163747