Startseite Experimental study on phase relationships in the Co-rich portion of the Co–Ti–Zr system
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Experimental study on phase relationships in the Co-rich portion of the Co–Ti–Zr system

  • Yafei Pan , Peng Zhou , Yong Du , Yingbiao Peng , Chong Chen und Fenghua Luo
Veröffentlicht/Copyright: 26. Februar 2016
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International Journal of Materials Research
Aus der Zeitschrift International Journal of Materials Research Band 107 Heft 3

Abstract

The isothermal section at 1 050 °C and the liquidus projection in the Co-rich portion of the ternary Co–Ti–Zr system were determined. The microstructures and solidification paths of the as-cast alloys were established experimentally. The constituent phases and their compositions of both as-cast and heat-treated alloys were investigated by means of optical microscopy, X-ray diffraction and electron probe microanalysis. No ternary compound was observed. For the Co-rich portion of the isothermal section at 1 050 °C, there are four three-phase regions, αCo + TiCo3 + TiCo2 (h), αCo + TiCo2 (h) + (Ti,Zr)Co2 (c), αCo + (Ti,Zr)Co2 (c) + Zr6Co23 and αCo + Zr2Co11 + Zr6Co23. For the investigated liquidus projection, there exist six primary crystallization fields: αCo, TiCo3, TiCo2 (h), (Ti,Zr)Co2 (c), Zr2Co11 and Zr6Co23; three transition invariant reactions, L + αCo → TiCo3 + TiCo2 (h), L + (Ti,Zr)Co2 (c) → αCo + TiCo2 (h), and L + Zr6Co23 → αCo + Zr2Co11; and one eutectic invariant reaction of L → αCo + (Ti,Zr)Co2 (c) + Zr6Co23.

Keywords: Co–Ti–Zr ternary system; Phase diagram; XRD; EPMA
*Correspondence address, Professor Dr. Yong Du, State Key Laboratory of Powder Metallurgy, Central South University, Hunan, 410083, China. Tel.: +86 731 88836213, Fax: +86 731 88710855, E-mail:

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Received: 2015-02-08
Accepted: 2015-11-05
Published Online: 2016-02-26
Published in Print: 2016-03-11

© 2016, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111337
Schlagwörter für diesen Artikel
Co–Ti–Zr ternary system; Phase diagram; XRD; EPMA

Artikel in diesem Heft

  1. Contents
  2. Contents
  3. Original Contributions
  4. Fe–N and Fe–N–C phase equilibria above 853 K studied by nitriding/nitrocarburising and secondary annealing
  5. Microstructural development and crystallographic properties of decomposing Fe–N–C compound layers
  6. Experimental study on phase relationships in the Co-rich portion of the Co–Ti–Zr system
  7. On the role of alloying elements in the formation of serrated grain boundaries in Ni-based alloys
  8. Effect of drawing with shear on structure and properties of low-carbon steel
  9. Experimental study of FLD0 for aluminum alloy using digital image correlation with modified ISO method
  10. Global modeling for elevated temperature flow behavior of 6013 aluminum alloy during two-pass deformation
  11. The relationship between the pore size distribution and the thermo-mechanical properties of high alumina refractory castables
  12. Optimization of the phase composition of high-calcium-content slag for stabilization and the obtaining of hydraulic properties
  13. Short Communications
  14. Dynamic recrystallization kinetics in Mg-3Gd-1Zn magnesium alloy during hot deformation
  15. Original Contributions
  16. Photoluminescence properties of Tb3+-doped stalk-like Al2O3
  17. Effect of deposition parameters on the crystal orientation and growth of Ag nanowires
  18. DGM News
  19. DGM News
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