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Phase composition and microstructure of materials in the Ir–Ru–B system prepared by arc melting and VHP sintering

  • Xiaolong Zhou , Zhaobo Zhou , Kunhua Zhang and Jie Yu
Published/Copyright: May 4, 2017
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 108 Issue 5

Abstract

In this paper, materials in the Ir–Ru–B system with nominal compositions of Ir–Ru–2B and 3Ir–Ru–4B were synthesized by arc melting and vacuum hot press (VHP) sintering. The phase composition and microstructure were characterized using X-ray diffraction, back scatter electron imaging, energy dispersive spectroscopy and electron back scatter diffraction. Different preparation processes for these Ir–Ru–B system materials were studied. The results show that Ir–Ru–2B prepared by arc melting and VHP sintering contains Ir(Ru)B0.9 and Ru(Ir)B solid solutions, while 3Ir–Ru–4B contains Ir(Ru)B0.9, Ru(Ir)B2 and Ir(Ru) solid solutions. The error for the lattice parameters of the VHP sintered samples was larger than that of the arc melted samples. The energy spectrum analysis of the Ir–Ru–2B samples prepared using different processes indicates that the solubility of the solid solutions in the VHP sintered samples was higher than the solubility in the arc melted samples. The formation mechanisms for the (Ir, Ru)–B, (Ir(Ru)B0.9, Ru(Ir)B2 and Ru(Ir)B) and Ir(Ru) solid solutions are discussed in detail. There is more Ir(Ru) solid solution in the VHP sintered sample than in the arc melted sample, and the grain orientation of the former is more complex than that of the latter.

Keywords: Vacuum hot press sintering; Arc melting; Ir–Ru–B system; Phase constitution; Microstructure
*Correspondence address, Prof. Xiaolong Zhou, Department of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, 650093, P. R. China, Tel.: +8687165334185, Fax: +8687165334185, E-mail:

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Received: 2016-09-20
Accepted: 2017-02-09
Published Online: 2017-05-04
Published in Print: 2017-05-15

© 2017, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111492
Keywords for this article
Vacuum hot press sintering; Arc melting; Ir–Ru–B system; Phase constitution; Microstructure

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Downloads and the impact of Open Access at IJMR
  5. Original Contributions
  6. A material selection approach using the TODIM (TOmada de Decisao Interativa Multicriterio) method and its analysis
  7. Investigation of the influence of Fe on the microstructure and properties of Ti5553 near-β titanium alloy with combinatorial approach
  8. Evolution of the temperature, microstructures and microsegregation in equiaxed solidification of Al-5 wt.% Cu alloy
  9. Phase composition and microstructure of materials in the Ir–Ru–B system prepared by arc melting and VHP sintering
  10. Thermal shock behavior of rare earth modified alumina ceramic composites
  11. Investigation of tribological and corrosion properties of CuTi–alumina nanocomposite fabricated by mechanical alloying
  12. Effect of acetic acid on corrosion behavior of AISI 201, 304 and 430 stainless steels
  13. Verification of strength mis-match of electron beam welded heavy thickness titanium alloy
  14. Short Communications
  15. Effect of toughening Fe2B by the addition of tungsten on the wear resistance of Fe–B–C alloy
  16. Microstructural stability of heat-resistant high-pressure die-cast Mg-4Al-4Ce alloy
  17. DGM News
  18. DGM News
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