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Rare Metals

, Volume 38, Issue 7, pp 653–664 | Cite as

Mechanical alloying behaviors of Mo–Si–B-based alloy from elemental powders under different milling conditions

  • Tao Yang
  • Xi-Ping GuoEmail author
Article
  • 62 Downloads

Abstract

Elemental powder mixtures with the composition of Mo–12Si–10B–3Zr–0.3Y (at%) were milled in a planetary ball mill using hardened stainless-steel milling media under argon atmosphere. Effects of milling time, milling speed, process control agent, ball-to-powder ratio and milling ball size on the mechanical alloying processes were investigated from the points of morphology, internal structure, grain size, microstrain, phase constituent and dissolution of solute atoms. It is shown that under all conditions, the microstructural evolutions of mechanically milled powder particles are similar. The morphological evolution can roughly be divided into five stages: individual particle, irregular blocky composite particle, flake-shaped particle, agglomerate and single particle. The internal structure generally undergoes five stages: individual particle, coarse lamellar structure, fine lamellar structure, non-uniformly mixed structure and plum-pudding structure. Regardless of exceptional cases, the grain size of Moss decreases and its microstrain increases with the increase in milling time. Si and Zr atoms are dissolved into Mo gradually with the progress of milling. However, the evolutionary rates change significantly with milling conditions. The most significant influencing factor among different milling conditions is the input power from the mill to the powders, which plays a decisive role in the milling process.

Keywords

Mechanical alloying Milling parameter Milling energy Mo–Si–B 

Notes

Acknowledgements

This work was financially supported by the National Key R&D Program of China (No. 2017YFB0702903), the National Natural Science Foundation of China (Nos. 51431003 and U1435201) and the Research Fund of State Key Laboratory of Solidification Processing, China (No. 143-TZ-2016).

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Copyright information

© The Nonferrous Metals Society of China and Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.State Key Laboratory of Solidification ProcessingNorthwestern Polytechnical UniversityXi’anChina

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