Microstructure and mechanical properties of Cu-12Al-6Ni with graphite addition prepared by powder metallurgy
DENG Zhenghua1，2，YIN Haiqing3，WANG Haibao1，2，LI Wanquan1，2，JI Anping1，2
1. School of Mechanical Engineering，Chongqing Three Gorges University，Chongqing 404000，China；
2. Chongqing Engineering Technology Research Center for Light Alloy and Processing，Chongqing 404000，
China； 3.Collaborative Innovation Center of Steel Technology，University of Science and Technology Beijing，
Beijing 100083，China）
Abstract：The effect of graphite on the microstructure and properties of Cu-12Al-6Ni alloy prepared by powder
metallurgy was investigated. The results show that the number of pores, Al4Cu9, and NiAl phases in the structure
increases with increasing of the graphite content. The sintering density, hardness and tensile strength of the alloy
decreases as the graphite content increases. The friction coefficient and wear loss of the alloy first increases and
then decreases with the increasing of the graphite content. When the graphite content is 0.5%, the friction coefficient
reaches a maximum, and when the graphite content is 1%, the wear loss maximizes. When the graphite content
is 2%, the wear loss of alloy is approximately 32% lower than that of the alloy without graphite.
2022, Vol. 32 
