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Volume 39 Issue 3
Jun.  2021
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CHEN Peng-qi, TAI Yun-xiao, CHENG Ji-gui. Study on the sintering properties of Mo–La2O3 nano-powders prepared by solution combustion method[J]. Powder Metallurgy Technology, 2021, 39(3): 203-208. DOI: 10.19591/j.cnki.cn11-1974/tf.2021020009
Citation: CHEN Peng-qi, TAI Yun-xiao, CHENG Ji-gui. Study on the sintering properties of Mo–La2O3 nano-powders prepared by solution combustion method[J]. Powder Metallurgy Technology, 2021, 39(3): 203-208. DOI: 10.19591/j.cnki.cn11-1974/tf.2021020009
shu

Study on the sintering properties of Mo–La2O3 nano-powders prepared by solution combustion method

  • 1.

    School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China

  • 2.

    Powder Metallurgy Engineering and Technology Research Center of Anhui Province, Hefei University of Technology, Hefei 230009, China

  • 3.

    National-Local Joint Engineering Research Center of Nonferrous Metals and Processing Technology, Hefei University of Technology, Hefei 230009, China

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  • Corresponding author:

    CHENG Ji-gui, E-mail: jgcheng@hfut.edu.cn

  • Received Date: February 22, 2021
  • Available Online: April 13, 2021
    Graphical Abstract
    • Abstract
  • Molybdenum (Mo) precursor powders doped by lanthanum oxides (La2O3) were prepared by the ultra-rapid solution combustion synthesis method using the low-cost and non-toxic starting materials, and the precursor powders were reduced and sintered. The effect of La2O3 doping content (mass fraction) on the properties of Mo–La2O3 alloys was studied. The results show that, the La2O3 doped molybdenum powders with the average particle size of 100~220 nm are obtained by the reduction of the combustion precursor in the hydrogen atmosphere at 700 ℃. The relative density of La2O3 doped molybdenum alloys sintered at 1600 ℃ is over 95%. With the increase of La2O3 doping content (mass fraction in the range of 0~1.0%), the microhardness increases firstly and then decreases. When the La2O3 doping content is 0.7%, the grain size of Mo is about 500 nm, and the microhardness of the materials reaches the highest as HV0.2 564.
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    • References (16)
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