Hybrid thermal stabilization of Zr doped nanocrystalline Cu

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ID: 94727
2019
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Abstract
The present investigation demonstrates the synthesis of nanocrystalline Cu-0.5 at.% Zr alloy through high energy ball milling at cryogenic temperature and thermal stability of the nanocrystalline structure during annealing up to 800 °C. The effect of Zr addition on the evolution of microstructure in the cryomilled and annealed alloy has been studied through X-ray diffraction (XRD), transmission electron microscopy (TEM), and Molecular dynamics (MD) simulation. Microhardness measurement has been performed in order to study the stability in the mechanical property of the alloy at high temperature. Analysis of XRD and TEM results show that at high-temperature Zr leaves Cu matrix and nano-size intermetallicCu5Zr particle dispersed throughout the matrix, whereas, MD simulation traced atomic clusters of Zr at the vicinity of grain boundaries. Zr stabilizes the average grain size in nanoscale regime even after 800 °C due to intermetallic pinning and solute segregation, with very little compromise in the hardness value of only ~7.4% (2.9 GPa to 2.4 GPa) compared to the as-milled alloy. Keywords: Nanocrystalline, Grain growth, Segregation, Pinning, Thermal stabilization
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sikdar2019hybridmaterials Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Sikdar, K.;Mahata, A.;Roy, B.;Roy, D.;
Journal materials & design
Year 2019
DOI
DOI not found
URL
http://www.sciencedirect.com/science/article/pii/S0264127518309286
Keywords
chemistry Organic Chemistry Materials of engineering and construction. Mechanics of materials Technology (General) Chemical technology Engineering (General). Civil engineering (General) Science (General) mathematics

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