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Volume 38 Issue 5
Oct.  2020
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GUO Shi-bo, YI Zheng-yi, WANG Nan-chuan, SUN Jing, LIAO Jing-bing. Study on sintering properties of nano Mo–40Cu composite powders prepared by hydrothermal method and hydrogen reduction method[J]. Powder Metallurgy Technology, 2020, 38(5): 377-382. DOI: 10.19591/j.cnki.cn11-1974/tf.2020050010
Citation: GUO Shi-bo, YI Zheng-yi, WANG Nan-chuan, SUN Jing, LIAO Jing-bing. Study on sintering properties of nano Mo–40Cu composite powders prepared by hydrothermal method and hydrogen reduction method[J]. Powder Metallurgy Technology, 2020, 38(5): 377-382. DOI: 10.19591/j.cnki.cn11-1974/tf.2020050010
shu

Study on sintering properties of nano Mo–40Cu composite powders prepared by hydrothermal method and hydrogen reduction method

  • School of Materials Science and Engineering, Hunan University of Science and Technology, Xiangtan 411201, China

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    • Abstract
  • The Mo-40Cu composite powders were prepared by the hydrothermal and hydrogen reduction method, the effects of sintering process in the hydrogen atmosphere on the microstructure and mechanical properties of the Mo-40Cu composites were studied by X-ray diffraction (XRD), scanning electron microscope (SEM), and transmission electron microscope (TEM). The results show that, the optimum process parameters for the powder preparation are 400 ℃ for the hydrothermal temperature and 700 ℃ for the hydrogen reduction temperature, obtaining the homogeneous Mo-40Cu composite powders with the powder particle size of 70~90 nm. The optimum sintering process in the hydrogen atmosphere is sintering at 1300 ℃ for 2 h, the relative density, bending strength, hardness, electrical conductivity, and thermal conductivity are 98.1%, 1060 MPa, HRA 51, 20.8 MS·m-1, and 191.7 W·m-1·K-1, respectively, and the thermal expansion coefficient is 10.8×10-6 K-1 at 500~700 ℃. The microstructure of Mo-40Cu alloy is homogenous with the grain size of about 3~4 μm.
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    • References (18)
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