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CSME 2024/06
Volume 45 No.3
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209-217
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Copper-Reduction Alloy Design for Brake Pads
Tzung-Ming Chena and Chung-Jia Huanga
aDepartment of Industrial Education and Technology, National Changhua University of Education, Changhua, Taiwan 50074, ROC.
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Abstract:
In this study, a copper-reduction brake pad was designed based on environmental considerations. Solid diffusion calculations were performed for the brake pads containing 35 wt.% copper and 15 wt.% nickel. Functional alloy elements were added to the brake pads using a powder metallurgy process to achieve the desired results. The effect of each component on the mechanical properties of the pad was studied by adjusting the alloy ratio in the specimens. The binding behaviors of the copper substrate and additives were also analyzed. As a result, 35 wt.% copper and 15 wt.% nickel exhibited miscibility, and adding vanadium and silicon powder increased the bonding strength between the copper powder and the alloy. The maximum shear strength of the specimens reached 324 kgf, which is sufficient to cope with daily brake use. In addition, increasing the contents of tin, silicon, and nickel had a positive effect on the mechanical properties of the specimens with 35 wt.% copper, whereas, increasing the zinc content had a negative effect. Finally, the relationship among the copper concentration, sintering temperature, and time was calculated based on the diffusion theory, and the self-diffusion trend curves were plotted to obtain the sintering parameters so that the brake pad and the copper-sputtered back plate could reach 100% adhesion. Powder metallurgy related industries can reduce the number of trials in product development based on the results of this research, and can refer to the experimental parameters to plan the carbon- reduction process.
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Keywords: copper reduction, brake pads, powder metallurgy, alloy design.
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*Corresponding author; e-mail:
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©
2024
CSME , ISSN 0257-9731
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