Effects of Process Gas Pressure and Type on Oxygen Content in Sintered Titanium Produced using Jet-Milled Titanium Hydride Powders

Titanium hydride powders are increasingly being used to produce titanium components via powder metallurgy processes due to their improvements in densification over titanium metal powders. Since the oxygen content plays a significant role in the mechanical properties of titanium alloys, understanding...

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Bibliographic Details
Published in:JOM (1989) 2020-03, Vol.72 (3), p.1286-1291
Main Authors: Dunstan, Matthew K., Simpson, Brandyn, Sun, Pei, Koopman, Mark, Fang, Z. Zak
Format: Article
Language:English
Subjects:
Additive manufacturing
Advances in Characterization of Powder Materials
Alloy powders
Argon
Chemistry/Food Science
Comminution
Cost control
Densification
Earth Sciences
Engineering
Environment
Gas pressure
Gases
Hydrides
Hydrogen
Injection molding
Materials Science
Mechanical properties
Metal powders
Metallurgy & Metallurgical Engineering
Microstructure
Mineralogy
Mining & Mineral Processing
Oxygen
Oxygen content
Particle size
Physics
Powder metallurgy
Pressure effects
Sintering
Sintering (powder metallurgy)
Titanium alloys
Titanium base alloys
Titanium compounds
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Summary:Titanium hydride powders are increasingly being used to produce titanium components via powder metallurgy processes due to their improvements in densification over titanium metal powders. Since the oxygen content plays a significant role in the mechanical properties of titanium alloys, understanding how powder preparation techniques, such as milling, affect the final oxygen content is key. In this work, titanium hydride powders were milled through jet milling using air, nitrogen, and argon gas at various processing pressures. The oxygen content in the sintered powders is shown to be mostly dependent on the specific surface area, which is mainly affected by the grinding pressure. The type of gas used was also found to have an effect on the oxygen content, but the dependence was small.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-020-04010-0