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Spherical modification of tungsten oxide powder and its mechanism analysis

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Abstract

Owing to its high production costs, complexity of equipment, and difficulty in controlling parameters, spherical or subglobose tungsten powder preparation method cannot meet the demand of industrial production. Tungstic oxide powder was treated by particle composite system and its effects were studied. Morphologies of particles were investigated by scanning electron microscopy (SEM). Particle size analysis was carried out and the related mechanism was discussed. The results show that the processing effect is best when the rotational speed is set at 4,000 r·min−1 for 15 min: the powder particles become nearly spherical and their sharp edge angles are rounded off and reshaped. When the processing time is 60 min, the powders smash to pieces because of too much energy inputting. So the test results, such as grain size distribution, can be explained well. Nearly spherical tungsten powder is obtained after reduction at 780 °C for 2 h and its flow ability is significantly improved.

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References

  1. Peng ZH, Li HG. Behaviours of local priority reoxidation of tungsten powder—a study. Metall Eng. 1999;19(2):61.

    Google Scholar 

  2. White GD, Gurwell WE. Freeze dried tungsten heavy alloys. Adv Powder Metall. 1989;1:355.

    Google Scholar 

  3. Smith RW, Kim M, Kappor D. Structure and properties of spray formed tungsten base composite. Adv Part Mater Process. Princeton; 1997. 219.

  4. Luo LM, Lu ZL, Li H, Luo GN, Zan X, Wu YC. Current status and development trend on rare earth modified tungsten alloys. Chin J Rare Met. 2013;37(6):993.

    Google Scholar 

  5. Qiao JC, Xi ZP, Tang HP, Zhu JL, Wang JY, Ao QB. Current status of metal porous materials by powder metallurgy technology. Rare Met Mater Eng. 2008;37(11):2054.

    Google Scholar 

  6. Zhou HB, Jin S, Zhang Y, Lu GH. First-principles study of carbon effects in a tungsten grain boundary: site preference, segregation and strengthening. Sci China-Phys Mech Astron. 2011;54(12):2164.

    Article  Google Scholar 

  7. Lei CP, Tang JC, Cai DY, Wu AH. Reduction-carburization medium-size tungsten carbide powder. Chin J Rare Met. 2013;37(3):365.

    Google Scholar 

  8. Liu KM, Liao JC, Zhang ZD. A new technology of preparation spherical tungsten powder. Rare Met Mater Eng. 1987;4:26.

    Google Scholar 

  9. Guo SQ, Ge CC, Feng YB, Zhou ZJ, Zhou ZJ. Research on low-cost plasma spheroidization technology for spherical tungsten powder used in thermal spraying. Powder Metall Ind. 2010;20(3):1.

    Google Scholar 

  10. Sheng YW, Hao JJ, Guo ZM, Shao HP, Huang H. Preparation of spherical tungsten powder by RF induction plasma. Rare Met Mater Eng. 2011;40(11):2033.

    Google Scholar 

  11. Peng ZH, Li HG. Research on the effects of oxidation rate with re-oxidation process parameters of tungsten powder. Rare Metal Cem Carbides. 1993;3(114):14.

    Google Scholar 

  12. Fu XM. Submicron spherical tungsten powder prepared with ammonium paratungstate through the circulatory oxidization-reduction method. Rare Met Mater Eng. 2010;39(S1):468.

    Google Scholar 

  13. Liu XB, Jia CC, Chen CH, Gai GS. Fabrication of nano-Al2O3/Cu composite with powder treated by spherical process. J Iron Steel Res. 2007;14(1):94.

    Article  Google Scholar 

  14. Hao XY, Gai GS, Yang YF, Nan CW, Lai MB. PCS system and application. Nonferrous Min Metall. 2005;21(S1):142.

    Google Scholar 

  15. Pfeffer R, Dave RN, Wei DG, Ramlakhan M. Synthesis of engineered particulates with tailored properties using dry particle coating. Powder Technol. 2001;117(1):40.

    Article  Google Scholar 

  16. Hao XY, Gai GS, Zou X, Wu YX, Zhang YH, Emmanuelle R. Shape modification of HDH Ti powder and its mechanism analysis. Rare Met Mater Eng. 2009;38(S3):264.

    Google Scholar 

  17. Liu Y, Tang JC, Lei CP, Ye N, Zhuo HO. Hydrogen reducing process and mechanism of tungsten oxide. Powder Metall Ind. 2012;22(04):26.

    Google Scholar 

  18. Wang G, Li HH, Huang ZW, Chen MH, Wang QK, Zhong WL. Comparison of ultrafine tungsten powder produced by hydrogen reduction of blue tungsten oxide and violet tungsten oxide. Rare Met Mater Eng. 2009;38(S1):548.

    Google Scholar 

  19. Xie ZH, Chen SM, Wang WH, Zhang QH, Zhao HT, Liu B. On the preparation technology of spherical tungsten powder. China Tungsten Ind. 2009;24(4):40.

    Google Scholar 

Download references

Acknowledgments

This study was financially supported by the International Science and Technology Cooperation Program of China (No. 2010DFR50360).

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Authors and Affiliations

  1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing, 100083, China

    Cong-Cong Wang, Cheng-Chang Jia & Peng Gao

  2. Powder Technology R&D Group, Department of Material Science and Engineering, Tsinghua University, Beijing, 100084, China

    Guo-Cheng Gai & Yu-Fen Yang

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  1. Cong-Cong Wang
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  2. Cheng-Chang Jia
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  3. Peng Gao
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  4. Guo-Cheng Gai
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  5. Yu-Fen Yang
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Correspondence to Cheng-Chang Jia.

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Wang, CC., Jia, CC., Gao, P. et al. Spherical modification of tungsten oxide powder and its mechanism analysis. Rare Met. 34, 183–188 (2015). https://doi.org/10.1007/s12598-014-0370-8

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  • DOI: https://doi.org/10.1007/s12598-014-0370-8

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