Abstract Powder metallurgical processing of β-type Ti alloys is an emerging approach for the production of compact or porous materials for bone implant applications which combine very low stiffness with suitable strength. Significant strength enhancement can be expected when ultrafine-grained material states are achieved in consequence of employing nanocrystalline starting materials for the powder compaction process. In the present study it is demonstrated that nanocrystalline (Ti,Nb)H 2 with fcc CaF 2 type crystal structure (Fm-3m) can be obtained via reactive milling of Ti and Nb in hydrogen atmosphere. (Ti 0.75 Nb 0.25 )H 2 contains 3.2 wt% hydrogen which is completely desorbed below 700 °C in three steps. Thermal desorption treatment of the as-prepared nanocrystalline hydride powder leads to the formation of ultrafine-grained β-type Ti40Nb.

中文翻译：

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氢元素反应研磨制备的超细晶粒 Ti-40Nb

摘要 β 型钛合金的粉末冶金加工是生产用于骨植入应用的致密或多孔材料的新兴方法，其结合了非常低的刚度和合适的强度。当粉末压实过程采用纳米晶起始材料而达到超细晶粒材料状态时，可以预期强度显着提高。在本研究中，证明了通过在氢气氛中反应研磨 Ti 和 Nb 可以获得具有 fcc CaF 2 型晶体结构 (Fm-3m) 的纳米晶 (Ti,Nb)H 2 。(Ti 0.75 Nb 0.25 )H 2 包含 3.2 wt% 的氢，在低于 700 °C 时分三个步骤完全解吸。对所制备的纳米晶氢化物粉末进行热解吸处理，形成超细晶 β 型 Ti40Nb。