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  1. 2 Acta Physica Polonica A

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  1. 2 2014

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  1. 2 Adamek G.

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Mechanical Alloying of Ti-20Ta-20Nb-(10÷20)Mg Alloys

100%
Adamek G.
Acta Physica Polonica A
|
2014
|
vol. 126
|
issue 4
871-874
EN
In this paper preparation of new β-Ti alloys using mechanical alloying process has been shown. β -Ti alloys are the best metallic biomaterials because of their excellent properties: biocompatibility, low Young moduli and corrosion resistance. Ti-20Ta-20Nb biocompatible alloy was investigated. Mg was used as alloying element, as well (10, 15 and 20 wt%). Pure Ti, Nb, Ta and Mg powders were alloyed under argon atmosphere in shaker type mill (Spex 8000). There was no problem with cold welding in the mechanical alloying of titanium alloys containing Mg. In the paper a possibility of porous materials preparation by sintering in temperature higher than boiling temperature of Mg has been shown. This thermal dealloying method could be an alternative to space holder technique.
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Influence of Type of Alcohol as the Process Control Agent on Ti-20Ta-20Nb Alloy Preparation by Mechanical Alloying

100%
Adamek G.
Acta Physica Polonica A
|
2014
|
vol. 126
|
issue 4
875-878
EN
In this paper the influence of alcohols as the process control agents on β-Ti alloys preparation using mechanical alloying process was investigated. Three types of alcohols: methanol, ethanol and isopropanol were used in mechanical alloying of Ti-20Ta-20Nb. Pure Ti, Ta, Nb powders and process control agents were alloyed under argon atmosphere in shaker type mill (Spex 8000). Using X-ray diffraction technique, there has been observed the β phase formation after 3 h of mechanical alloying process. Using alcohols as process control agent it is possible to obtain nanocrystalline powders of titanium alloys. The milled powder was sintered in vacuum using hot pressing with high frequency induction heating. It has been shown that sintering process of powders prepared with alcohols as process control agents results in oxides and carbides formation in the alloy structure. Moreover some part of alcohol could evaporate leaving open spaces which results in relatively high porosity of the sinters.
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