TY  - JOUR
N1  - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions.
EP  - 11
Y1  - 2024/01/15/
AV  - public
VL  - 536
TI  - Enhanced mechanical and tribological properties of low-cost core-shell structured microcrystalline graphite/Cu composites
KW  - Carbon-coated microcrystalline graphite/Cu; Tribological properties; Solid self-lubrication; Powder metallurgy
A1  - Zhong, Min
A1  - Duan, Shengzhi
A1  - Wu, Xiaowen
A1  - Min, Xin
A1  - Huang, Zhaohui
A1  - Fang, Minghao
A1  - Li, Huanxin
A1  - Ding, Hao
A1  - Luo, Bingcheng
JF  - Wear
SN  - 0043-1648
PB  - Elsevier
UR  - https://doi.org/10.1016/j.wear.2023.205155
ID  - discovery10192847
N2  - In the past, microcrystalline graphite (MG) was mainly used for the preparation of carbon enhancers and flame retardant, and is a low value-added inorganic mineral. There are very few reports of MG being compounded with Cu to produce friction materials. Carbon coated microcrystalline graphite/Cu (Carbon@MG/Cu) composites were prepared by coating MG with phenolic resin and mixing it with Cu. The effect of the phenolic resin coating on the mechanical and tribological properties of the composites was investigated by comparison with pure Cu, microcrystalline graphite/Cu (MG/Cu). The hardness and flexural strength of pure Cu were 39.8 HV and 72.3 MPa, respectively. The protection of the amorphous carbon shells led to a significant improvement in the mechanical properties of Carbon@MG/Cu, with hardness and flexural strengths of 72.3 HV and 103.8 MPa. The poor bonding between the MG and Cu severely affects its mechanical properties. Pure Cu has the highest wear rate (10.6 
 10?7(mm3/(N?m)), while Carbon@MG/Cu has a stable coefficient of friction (0.19) and the lowest wear rate (4.3 в 10?7 (mm3/(N?m)) compared to pure Cu and MG/Cu. We provide a method to prepare graphite/Cu composites with high mechanical and tribological properties based on low-cost MG, which helps to solve the problem of reuse of MG and increase its industrial added value.
ER  -