New Deoxidation Method of Titanium Using Metal Filter in Molten Salt
New Deoxidation Method of Titanium Using Metal Filter in Molten Salt
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DOI：
10.1007/s11663-021-02400-6
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发表时间：
2022-02
期刊：
影响因子：
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通讯作者：
Akihiro Iizuka;T. Ouchi;T. Okabe
中科院分区：
文献类型：
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作者：
Akihiro Iizuka;T. Ouchi;T. Okabe
金属Ti在高温下对O具有很强的亲和力，直接从Ti中除去O的方法受到限制。最近，作者开发了一种新的烧结工艺，在熔盐中使用Y金属作为脱氧剂从Ti中去除O。然而，Y污染了烧结的Ti主体。为了解决这个问题，作者开发了一种新的钛脱氧工艺，使用金属过滤器。在该过程中，将由Ti粉末和Y金属制成的Ti绿色与熔融盐一起引入由Ti过滤器分隔的室的相应侧。从Ti绿色中去除的O通过Ti过滤器并与Y金属反应。同时，Y在β-Ti中的小溶解度和扩散系数预期从动力学上防止Y对烧结Ti体的污染。实验证明，在新工艺中可以生产具有低O浓度（< 250质量ppm O）的烧结Ti产品，同时抑制Y污染（< 120质量ppm Y）。该工艺的建立，使未来高功能钛产品的低成本生产和钛废料的回收利用成为可能。
Metallic Ti has a strong affinity for O at high temperatures, and methods for removing O directly from Ti are limited. Recently, the authors developed a new sintering process that removes O from Ti using Y metal as a deoxidizing agent in molten salt. However, Y contaminated the sintered Ti body. To address this problem, the authors developed a new Ti deoxidation process using a metal filter. In this process, a Ti green made of Ti powder and Y metal are introduced with molten salt into the respective sides of a room divided by a Ti filter. O removed from the Ti green passes through the Ti filter and reacts with the Y metal. Meanwhile, the small solubility and diffusion coefficient of Y inβ-Ti are expected to kinetically prevent Y contamination of the sintered Ti body. It was experimentally demonstrated that a sintered Ti product with a low-O-concentration (< 250 mass ppm O) can be produced while suppressing Y contamination (< 120 mass ppm Y) in the new process. The establishment of this process enables low-cost production of highly functional Ti products and the recycling of Ti scraps in the future.