Abstract

Titanium and zirconium metal powder spheroidization by thermal plasma processes

Highlights

  • Contemporary product design processes have been affected by new technologies that assist the manufacturing sector to meet the specifications of specialized components used in the aerospace and medical industries

  • This paper presents a short background on the DC plasma and RF induction plasma systems used for spheroidization, as well as some background on the properties of powder before and after plasma treatment

  • Available literature indicated that titanium metal particles can be spheroidized in a thermal plasma by re melting of irregularly shaped particles at high temperatures and solidifying the droplets by a rapid quench

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Summary

The Journal of The Southern African Institute of Mining and Metallurgy

Titanium and Zirconium metal powder spheroidization by thermal plasma processes industries, naval applications, offshore oil industries, architecture, and medicine. A convenient way to produce spherical particles, and in particular titanium particles, is to re melt irregularly shaped titanium particles at high temperatures and solidify the droplets by rapid quenching. This can be done by using thermal plasmas, which are characterized by their extremely high temperatures (3 000–10 000 K) and rapid heating and cooling rates A few experimental results relating to the spheroidisation of titanium powder using DC plasmas and RF induction plasmas at the South African Nuclear Energy Corporation (Necsa) are discussed

Thermal plasmas for spheroidization
RF induction plasma
DC plasma
Powder properties
Density and flowability of powders
Impurities levels
Tap density Production rate Particle size
RF thermal plasma system
DC thermal plasma system
Results and discussion
RF thermal plasma treatment
DC thermal plasma treatment
Conclusions
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