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Microstructure Refinement in W-Y2O3 Alloy Fabricated by Wet Chemical Method with Surfactant Addition and Subsequent Spark Plasma Sintering

Journal Article


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Abstract


  • With the aim of preparing high performance oxide-dispersion-strengthened tungsten based alloys by powder metallurgy, the W-Y 2 O 3 composite nanopowder precursor was fabricated by an improved wet chemical method with anion surfactant sodium dodecyl sulfate (SDS) addition. It is found that the employment of SDS can dramatically decrease W grain size (about 40 nm) and improve the size uniformity. What's more, SDS addition can also remarkably improve the uniform dispersion of Y 2 O 3 particles during the synthesis process. For the alloy whose powder precursor was fabricated by traditional wet chemical method without SDS addition, only a few Y 2 O 3 dispersoids with size of approximate 10-50 nm distribute unevenly within tungsten grains. Nevertheless, for the sintered alloy whose powder precursor was produced by improved wet chemical method, the Y 2 O 3 dispersoids (about 2-10 nm in size) with near spherical shape are dispersed well within tungsten grains. Additionally, compared with the former, the alloy possesses smaller grain size (approximate 700 nm) and higher relative density (99.00%). And a Vickers microhardness value up to 600 Hv was also obtained for this alloy. Based on these results, the employment of SDS in traditional wet chemical method is a feasible way to fabricate high performance yttria-dispersion-strengthened tungsten based alloys.

Authors


  •   Dong, Zhi (external author)
  •   Liu, Nan (external author)
  •   Ma, Zongqing (external author)
  •   Liu, Chenxi (external author)
  •   Guo, Qianying (external author)
  •   Alothman, Zeid Abdullah. (external author)
  •   Yamauchi, Yusuke (external author)
  •   Hossain, Md Shahriar
  •   Liu, Yongchang (external author)

Publication Date


  • 2017

Citation


  • Dong, Z., Liu, N., Ma, Z., Liu, C., Guo, Q., Alothman, Z. Abdullah ., Yamauchi, Y., Hossain, M. A. & Liu, Y. (2017). Microstructure Refinement in W-Y2O3 Alloy Fabricated by Wet Chemical Method with Surfactant Addition and Subsequent Spark Plasma Sintering. Scientific Reports, 7 (1), 6051-1-6051-8.

Scopus Eid


  • 2-s2.0-85025171766

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3696&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2648

Start Page


  • 6051-1

End Page


  • 6051-8

Volume


  • 7

Issue


  • 1

Place Of Publication


  • United Kingdom

Abstract


  • With the aim of preparing high performance oxide-dispersion-strengthened tungsten based alloys by powder metallurgy, the W-Y 2 O 3 composite nanopowder precursor was fabricated by an improved wet chemical method with anion surfactant sodium dodecyl sulfate (SDS) addition. It is found that the employment of SDS can dramatically decrease W grain size (about 40 nm) and improve the size uniformity. What's more, SDS addition can also remarkably improve the uniform dispersion of Y 2 O 3 particles during the synthesis process. For the alloy whose powder precursor was fabricated by traditional wet chemical method without SDS addition, only a few Y 2 O 3 dispersoids with size of approximate 10-50 nm distribute unevenly within tungsten grains. Nevertheless, for the sintered alloy whose powder precursor was produced by improved wet chemical method, the Y 2 O 3 dispersoids (about 2-10 nm in size) with near spherical shape are dispersed well within tungsten grains. Additionally, compared with the former, the alloy possesses smaller grain size (approximate 700 nm) and higher relative density (99.00%). And a Vickers microhardness value up to 600 Hv was also obtained for this alloy. Based on these results, the employment of SDS in traditional wet chemical method is a feasible way to fabricate high performance yttria-dispersion-strengthened tungsten based alloys.

Authors


  •   Dong, Zhi (external author)
  •   Liu, Nan (external author)
  •   Ma, Zongqing (external author)
  •   Liu, Chenxi (external author)
  •   Guo, Qianying (external author)
  •   Alothman, Zeid Abdullah. (external author)
  •   Yamauchi, Yusuke (external author)
  •   Hossain, Md Shahriar
  •   Liu, Yongchang (external author)

Publication Date


  • 2017

Citation


  • Dong, Z., Liu, N., Ma, Z., Liu, C., Guo, Q., Alothman, Z. Abdullah ., Yamauchi, Y., Hossain, M. A. & Liu, Y. (2017). Microstructure Refinement in W-Y2O3 Alloy Fabricated by Wet Chemical Method with Surfactant Addition and Subsequent Spark Plasma Sintering. Scientific Reports, 7 (1), 6051-1-6051-8.

Scopus Eid


  • 2-s2.0-85025171766

Ro Full-text Url


  • http://ro.uow.edu.au/cgi/viewcontent.cgi?article=3696&context=aiimpapers

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2648

Start Page


  • 6051-1

End Page


  • 6051-8

Volume


  • 7

Issue


  • 1

Place Of Publication


  • United Kingdom