Production of Fine Titanium Powder from Titanium Sponge by the Shuttle of the Disproportionation Reaction in Molten NaCl–KCl
Production of Fine Titanium Powder from Titanium Sponge by the Shuttle of the Disproportionation Reaction in Molten NaCl–KCl
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DOI：
10.2320/matertrans.ma201811
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发表时间：
2019-03
影响因子：
1.2
通讯作者：
Xin Lu;T. Ono;O. Takeda;Hongmin Zhu
中科院分区：
文献类型：
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作者：
Xin Lu;T. Ono;O. Takeda;Hongmin Zhu
日本钛及其合金是各个领域的关键材料。低成本和高质量的钛粉生产方法对于钛的粉末冶金（PM）和增材制造（AM）至关重要，可以显著降低制造成本。本研究以原料钛为原料，在750°C的NaCl ∶ KCl熔融溶液中，通过钛离子的反硝化反应和钛离子向钛离子和钛金属的反硝化反应，实现了钛粉的制备。加入少量的TiCl 2，可得到质量比为Ti 2 +的7 <$70倍以上的钛粉。基于沉淀反应形成的粉末的初级粒度为约1μm，而次级附聚粒度在25 µm至50µm的范围内。在不同TiCl 2浓度和保温时间的实验运行中，未发现粒度分布的显著差异。预期建议的由海绵钛生产钛粉的方法将大幅降低钛粉的生产成本。[doi 10.2320
Japan Titanium and its alloys are key materials for various fi elds. Low cost and high-quality titanium powder production methods are crucial for powder metallurgy (PM) and additive manufacturing (AM) of titanium to signi fi cantly decrease the manufacturing cost. In this study, the production of titanium powder from raw material titanium sponge was achieved through the shuttle of the disproportionation reaction and the backward reaction of Ti 2 + to Ti 3 + and Ti metal in molten NaCl KCl at 750°C. With the addition of a very small amount of TiCl 2 , over 7 ³ 70 times of titanium powder in mass comparing to the added Ti 2 + was obtained. The primary particle size of the powder formed based on the disproportionation reaction was approximately 1µm, while the secondary agglomerated particle size was in the range of 25 ³ 50µm. No signi fi cant di ff erence of the particle size distribution was found for the experimental runs with di ff erent TiCl 2 concentrations and holding times. The proposed production method of titanium powder from titanium sponge is expected to signi fi cantly decrease the production cost of titanium powder. [doi:10.2320