Influence of Type of Alcohol as the Process Control Agent on Ti-20Ta-20Nb Alloy Preparation by Mechanical Alloying |
| G. Adamek
Poznań University of Technology, Institute of Materials Science and Engineering, pl. M. Skłodowskiej-Curie 5, 60-965 Poznań, Poland |
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| 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. |
DOI: 10.12693/APhysPolA.126.875 PACS numbers: 81.05.Bx, 81.07.+b, 81.40.+z |