| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Influence of TiO2 Calcination Pretreatment on Preparation of Ti6Al4V Alloy Powder by Calciothermic Self-propagating Method |
| YAN Jisen, DOU Zhihe*, ZHANG Ting'an
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| School of Metallurgy, Northeastern University, Shenyang 110819, China |
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Abstract Low-oxygen Ti6Al4V alloy powder was prepared by calciothermic self-propagation method with Ca as reducing agent and TiO2, V2O5 and Al as raw materials. XRD, SEM-EDS, ICP and oxygen nitrogen hydrogen analyzer were used to investigate the changes of grain size and specific surface area of TiO2 at different calcination temperatures,as well as the effects of different calcination temperatures on the products of Ti6Al4V powder. The results show that the grain size and specific surface area of TiO2 can be changed by adjusting the calcination temperature of TiO2, which affects the uniformity of the mixture and the moving path of O2- during the reaction, so as to reduce the oxygen content in the product. When TiO2 calcined at 1 000 ℃ is used as raw material, the production with an oxygen content of 0.187% (mass fraction) can be obtained (Al: 6.62%, V: 4.22%, Ca: 0.032% ).
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Published: 10 September 2022
Online: 2022-09-10
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| Fund:National Natural Science Foundation of China (U1908225,52174333), the Fundamental Research Funds for the Central Universities (N2025004). |
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