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800°C isothermal section of the Co–Cr–Mo–Si quaternary system

  • Songlin Jiang , Fucheng Yin , Minghua Zhang , Manxiu Zhao and Zhi Li
Published/Copyright: December 5, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 105 Issue 12

Abstract

The 800°C isothermal section of the Co–Cr–Mo–Si quaternary system with the Co content fixed at 70 at.% and different contents of Cr, Mo and Si was determined by means of X-ray diffraction and scanning electron microscopy coupled with energy dispersive X-ray spectroscopy. Twelve different phase regions could be identified; one of them being a wide (Co) + Co3Mo2Si phase field, but only one four-phase region consisting of (Co) + Co3Mo +Co7Mo6 + Co3Mo2Si was experimentally confirmed. The measured solubility of Si in the Co3Mo phase is rather limited but could reach up to 15.1 at.% in Co7Mo6. The solubility of Cr in Co3Mo and Co7Mo6 was measured to be as high as 13.4 and 23.3 at.%, respectively, and the maximum solubility of Cr in (Co), αCo2Si and Co3Mo2Si could reach 26.9, 5.6 and 12.5 at.%, respectively.

Keywords: Cobalt-based alloy; Co–Cr–Mo–Si; Phase diagram; X-ray diffraction
* Correspondence address, Professor Dr. Fucheng Yin, School of Mechanical Engineering, Xiangtan University, Hunan 411105, PR China and Key Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University, Hunan 411105, PR China, Tel.: +86 731 58292210, Fax: +86 731 58292210, E-mail:

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Received: 2014-01-22
Accepted: 2014-06-02
Published Online: 2014-12-05
Published in Print: 2014-12-08

© 2014, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111130
Keywords for this article
Cobalt-based alloy; Co–Cr–Mo–Si; Phase diagram; X-ray diffraction

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. On the orientation dependence of grain boundary triple line energy in Cu
  5. Hydrogen storage kinetics of as-cast and spun (Mg24Ni10Cu2)100–xNdx (x = 0–20) alloys
  6. Segregation of phosphorus to ferrite grain boundaries during transformation in an Fe–P alloy
  7. A study on the pseudoelasticity of low temperature aged and thermomechanically treated Ti-51.5 at.% Ni shape memory alloy
  8. Experimental determination and thermodynamic calculation of the phase equilibria in the Co–Mn–Ta system
  9. 800°C isothermal section of the Co–Cr–Mo–Si quaternary system
  10. Phase fraction mapping in the as-cast microstructure of extrudable 6xxx aluminum alloys
  11. Effect of thixoforming on morphological changes in iron-bearing intermetallics and mechanical properties of Al–Si–Cu alloys
  12. The superplasticity of friction stir processed Al-5Mg alloy with additions of scandium and zirconium
  13. Short Communications
  14. Anti-corrosion behaviour of VE/GF coatings on mild steel
  15. Intermetallic phase stabilized Al/Pb metallic emulsion
  16. Synthesis of ultrafine powder (W,Ti)C by microwave heating in a stream of argon
  17. Fabrication and properties of porous silicon nitride ceramics via microwave sintering
  18. DGM News
  19. Personal
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