首页|Thermal deformation behavior of GO/CeO2 in-situ reinforced Cu30Cr10W electrical contact material
Thermal deformation behavior of GO/CeO2 in-situ reinforced Cu30Cr10W electrical contact material
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NSTL
Elsevier
Cu30Cr10W and GO/CeO2-Cu30Cr10W composites were fabricated by the spark plasma sintering (SPS). The isothermal compression tests of the Cu30Cr10W and GO/CeO2-Cu30Cr10W composites were carried out on the Gleeble-1500 thermo-mechanical simulator under the deformation temperatures of 600–900 °C and strain rates of 0.001–1 s?1. The effects of graphene doped CeO2 on the thermal deformation behavior and microstructure of the composites were investigated. The results show that a trace amount of Cr7C3 layers/nanoparticles was in-situ formed at the interface between graphene and metal matrix, and the interfacial adhesion of composites improved significantly. The Cr particles grew in strip shape perpendicular to the compression direction, and the edge of tungsten carbide particles deformed slightly. With the increased of deformation temperature from 700 ℃ to 900 ℃, the texture component changed to fiber texture. In addition, the constitutive equations of the three composites were obtained. Compared with Cu30Cr10W composites, the addition of GO/CeO2 and the accompanying twinning mechanism increased the flow stress, and the activation energy increased by 8.4% and 33.1%, respectively. Furthermore, the hot working performance is obviously improved.
Constitutive equationsGOHot deformationIn-situ formation of Cr7C3Microstructure evolutionProcessing maps
Li X.、Jia Y.、Volinsky A.A.、Liang S.、Zhou M.、Zhang Y.、Liu S.、Tian B.、Geng Y.、Ban Y.、Liu Y.
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Center for Advanced Measurement Science National Institute of Metrology
College of Materials Science and Engineering Central South University
Department of Mechanical Engineering University of South Florida
School of Materials Science and Engineering Henan University of Science and Technology
NSTL
Elsevier
