Sintering formation of oriented linear cutting copper fibers
(1. Key Laboratory of Surface Functional Structure Manufacturing of Guangdong Higher Education Institutes,
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China;
2. Automotive Engineering Research Institute, Guangzhou Automobile Group Co., Ltd., Guangzhou 510640, China)
School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510640, China;
2. Automotive Engineering Research Institute, Guangzhou Automobile Group Co., Ltd., Guangzhou 510640, China)
Abstract: The formation mechanism of oriented linear cutting copper sintered felt was analyzed. The influences of sintering temperature, sintering atmosphere and sintering time on the sintering formation were investigated. And the tensile mechanical properties of sintering fibers under different sintering conditions were also analyzed. The results indicate that the formation of sintered necks in the contacted area due to the materials migration of microstructures on the surfaces of fibers promotes the tight connection of oriented linear cutting copper fibers. It is also found that both sintering temperature and sintering atmosphere show important effects on the sintering formation while the influence of sintering time is not so obvious. Sintering at 800 °C for 60 min under low temperature reduction can produce sintered necks to make fibers tightly connect together and maintain the coarse microstructure on the surface of fibers, and the best tensile mechanical property can be obtained as well.
Key words: sintering; porosity; fibers; mechanical properties