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| Effect of La
2O3 content on properties of copper-based powder metallurgy materials for subway collector boots |
| XU Xiongfei1，2，YIN Cailiu1，3，WANG Xiufei4，SONG Hao1 |
| （1.Institute of Friction Materials, Guangxi University for Nationalities, Nanning 530006, China； 2.Xi’an Ther‐
mal Power Research Institute Co., Ltd., Xi’an 710054 China； 3. Guangxi Colleges and Universities Key Labora‐
tory of Environmental-friendly Materials and New Technology for Carbon Neutralization, Guangxi Key Laboratory
of Advanced Structural Materials and Carbon Neutralization, Nanning 530105, China; 4. Beijing Youcaitec Mer‐
terial Co., Ltd., Beijing 100095, China） |
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Abstract Copper-based powder metallurgy friction materials containing 0%, 0.1%, 0.2% and 0.3% La2O3 were
prepared by powder metallurgy technology and their mechanical properties were measured. The friction perfor‐
mance was tested using MM-1000III friction and wear testing machine. The microstructure of friction surface and
impact section was observed by scanning electron microscope(SEM). The results showed that with the increase of
La
2O3 content, the impact strength and tensile strength of the material decreased first and then increased, while
the Brinell Hardness and resistivity increased. The friction coefficient increased with the increased of La2O3 con‐
tent under the same pressure and inertia configuration. The impact sections of all samples showed the characteris‐
tics of ductile fracture.
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Received: 09 September 2022
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Corresponding Authors:
尹彩流（1976—），男，博士，研究员，硕士生导师，主要研究方向为摩擦材料和复合材料。
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2023, Vol. 33 
