Issues »  Volume 37, Issue 4

Evolution of Phase Composition and Microstructure upon Synthesis of Zr—Sn Alloy from Zirconium Hydride and Tin Powders

D. G. Savvakin$^{1}$, D. V. Oryshych$^{2}$

$^{1}$G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{2}$Taras Shevchenko National University of Kyiv, 60 Volodymyrska Str., UA-01033 Kyiv, Ukraine

Received: 28.01.2015. Download: PDF

Microstructure and density evolution as well as thermal effects are investigated upon synthesis of Zr—1.5% Sn alloy from powder blends of zirconium-hydride and tin particles. Melting of tin particles at the initial stage of heating results in increased porosity, but does not accelerate chemical homogenization of powder system. Formation of solid intermetallics is accelerated at increased temperatures of 550—800°C due to hydrogen desorption and activation of zirconium matrix. Solid-state homogenization and sintering processes at higher temperatures produce homogeneous tin solution in zirconium. Particle sizes, temperature and time of sintering provide formation of low-porous (with relative density of more than 97%) chemically and microstructurally homogeneous material. Mechanical properties of fabricated alloy are at the level of properties of corresponding material produced with conventional ingot technology.

Key words: microstructure, mechanical properties, chemical homogenization, zirconium hydride, tin.

URL: http://mfint.imp.kiev.ua/en/abstract/v37/i04/0559.html

DOI: https://doi.org/10.15407/mfint.37.04.0559

PACS: 61.43.Gt, 61.66.Dk, 64.70.dj, 64.70.kd, 81.20.Ev, 81.30.Bx, 81.40.Ef

Citation: D. G. Savvakin and D. V. Oryshych, Evolution of Phase Composition and Microstructure upon Synthesis of Zr—Sn Alloy from Zirconium Hydride and Tin Powders, Metallofiz. Noveishie Tekhnol., 37, No. 4: 559—569 (2015)

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