Role of Surface Contamination in Titanium PM

Orest M. Ivasishin; Dmytro G. Savvakin; Mykola M. Gumenyak; Oleksandr B. Bondarchuk

doi:10.4028/www.scientific.net/KEM.520.121

Paper Titles

Enhanced Sintering of Pre-Alloyed Binary TiAl Powder by a Small Addition of Iron
p.89

Titanium Powder from the TiRO™ Process
p.95

Fundamental Reactor Design Considerations for Reducing TiCl₄ Metallothermically to Produce Ti Powder
p.101

A Novel Process for Making Spherical Powders of High Nb Containing TiAl Alloys
p.111

Role of Surface Contamination in Titanium PM
p.121

Effects of Lubrication on the Powder Metallurgy Processing of Titanium
p.133

Effect of Contaminants on Sintering of Ti and Ti-6Al-4V Alloy Powders in an Argon-Back-Filled Graphite Furnace
p.139

Metal Injection Moulding of Low Interstitial Titanium
p.145

Metal Injection Moulding of Titanium and Titanium-Aluminides
p.153

HomeKey Engineering MaterialsKey Engineering Materials Vol. 520Role of Surface Contamination in Titanium PM

Role of Surface Contamination in Titanium PM

Abstract:

The powder metallurgy (PM) approach is widely used for cost-effective production of titanium alloys and articles. In the PM approach the large specific surface of starting powders heightens the risk of excessive impurity presence and, hence, degradation of final alloy properties. The present study analyzes the opportunity to produce sintered commercially pure titanium (CP-Ti) with acceptable impurity content from powder materials. Starting titanium and titanium hydride powders were comparatively examined. The impurity elements (oxygen, chlorine, carbon) and their conditions on the powder particle surface, as well as the surface processes and gases emitted from powders upon heating, have been analyzed by means of surface science techniques. The role of hydrogen emitted from titanium hydride in material purification has been discussed. The opportunity to produce titanium materials with final admissible content of interstitials (O, C, Cl, and H) using starting titanium hydride powder has been demonstrated.

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Periodical:

Key Engineering Materials (Volume 520)

Pages:

121-132

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.520.121

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Online since:

August 2012

Authors:

Orest M. Ivasishin, Dmytro G. Savvakin, Mykola M. Gumenyak, Oleksandr B. Bondarchuk

Keywords:

Hydrogen, Impurity, Powder Surface, Titanium Hydride Powder, Titanium Powder

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