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Synthesis of Ti–Al Bimodal Powder for High Flowability Feedstock by Electrical Explosion of Wires

Authors :
Marat Lerner
Alexander Pervikov
Elena Glazkova
Nikolay Rodkevich
Konstantin Suliz
Sergey Kazantsev
Nikita Toropkov
Olga Bakina
Source :
Metals, Vol 12, Iss 3, p 478 (2022)
Publication Year :
2022
Publisher :
MDPI AG, 2022.

Abstract

In this research, Ti–Al bimodal powders were produced by simultaneous electrical explosion of titanium and aluminum wires. The resulting powders were used to prepare powder–polymer feedstocks. Material characterization involving X-ray diffraction (XRD), transmission electron microscopy (TEM), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and melt flow index (MFI) determination were carried out to characterize bimodal powders obtained and evaluate the influence of the powder composition on the feedstock flowability. The bimodal distribution of particles in powders has been found to be achieved at a current density of 1.2 × 107 A/cm2 (the rate of energy input is 56.5 J/μs). An increase in the current density to 1.6 × 107 A/cm2 leads to a decrease in the content of micron particles and turning into a monomodal particle size distribution. The use of bimodal powders for powder–polymer feedstocks allows to achieve higher MFI values compared with monomodal powders. In addition, the use of electroexplosive synthesis of bimodal powders makes it possible to achieve a homogeneous distribution of micro- and nanoparticles in the feedstock.

Details

Language :
English
ISSN :
20754701
Volume :
12
Issue :
3
Database :
Directory of Open Access Journals
Journal :
Metals
Publication Type :
Academic Journal
Accession number :
edsdoj.be579af16e8f4827a2dfd937393c0112
Document Type :
article
Full Text :
https://doi.org/10.3390/met12030478