Influence of CNTs addition on structural and superconducting properties of mechanically alloyed MgB<sub>2</sub>

Authors

  • S D Yudanto Universitas Indonesia http://orcid.org/0000-0001-9388-2986
  • Y P Dewi Sepuluh Nopember Institute of Technology
  • P Sebayang Indonesian Institute of Sciences
  • S A Chandra Indonesian Institute of Sciences
  • A Imaduddin Indonesian Institute of Sciences
  • B Kurniawan Universitas Indonesia
  • A Manaf Universitas Indonesia

Abstract

The result of adding carbon nanotubes (CNTs) to the lattice parameters, critical temperature and electrical resistivity of the MgB2 superconductors is reported. Structurally, the addition of CNTs was found to decrease the a-lattice from 3.086 Ã… of CNTs free sample to 3.078 Ã… and 3.074 Ã… of 5% and 10% CNTs added samples due to a substitution of C at the B site which presence in the form of Mg(B1-xCx)2 main phase. The doping level x of CNTs added samples were 2.25 at% and 3.75 at% respectively. The unreacted CNTs presence as the second phase and further acting as the suppression agent for crystallite growth. The addition of CNTs is also to refine the grain size and improves the grain connectivity. Samples show a metallic behavior which observed only at temperatures above ~41 K, below which, a sharp transition of resistivity occurred toward zero resistivity, confirming the superconductivity behavior. This study concluded that the effect of CNTs addition affects the structural parameters and superconducting properties. The addition of the CNTs to 5% and 10% has changed the zero critical temperature of the sample material to respectively 39.20 and 38.02 K from 39.31 K of CNTs free sample.

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Author Biographies

S D Yudanto, Universitas Indonesia

Department of Physics, Universitas Indonesia

Y P Dewi, Sepuluh Nopember Institute of Technology

Department of Materials, Sepuluh Nopember Institute of Technology

P Sebayang, Indonesian Institute of Sciences

Research Center for Physics, Indonesian Institute of Sciences

S A Chandra, Indonesian Institute of Sciences

Research Center for Metallurgy and Materials, Indonesian Institute of Sciences

A Imaduddin, Indonesian Institute of Sciences

Research Center for Metallurgy and Materials, Indonesian Institute of Sciences

B Kurniawan, Universitas Indonesia

Department of Physics, Universitas Indonesia

A Manaf, Universitas Indonesia

Department of Physics, Universitas Indonesia

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Published

2020-09-29

How to Cite

[1]
S. D. Yudanto, “Influence of CNTs addition on structural and superconducting properties of mechanically alloyed MgB<sub>2</sub>”, J. Met. Mater. Miner., vol. 30, no. 3, Sep. 2020.

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Original Research Articles