Fabrication of Metallic Fibers with High Melting Point and Poor Workability by Unidirectional Solidification
Fabrication of Metallic Fibers with High Melting Point and Poor Workability by Unidirectional Solidification
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DOI：
10.1002/adem.201700506
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发表时间：
2018-03-01
影响因子：
3.6
通讯作者：
Yoshikawa, Akira
中科院分区：
文献类型：
--
作者：
Yokota, Yuui;Nihei, Takayuki;Yoshikawa, Akira
采用合金微下拉（A-PD）方法和具有足够的机械和热冲击抗性的陶瓷坩埚，开发了可接受的用于生产具有高熔点和差的可加工性的铱（Ir）和钌（Ru）金属纤维的创新方法。生长（固化）的Ir和Ru纤维的直径约为1 mm，长度分别超过15和0.3 m。Ir和Ru纤维都由多个沿沿着方向取向的细长晶粒组成，这归因于单向凝固。的灵活性和抗氧化性的Ir纤维生长的A-PD方法相比，由拉丝工艺制成的商业Ir线大大提高。
Innovative method acceptable for production of Iridium (Ir) and Ruthenium (Ru) metal fibers with high melting point and poor workability is developed using an alloy-micro-pulling-down (A--PD) method and ceramic crucibles with sufficient mechanical and thermal shock resistance. As-grown (as-solidified) Ir and Ru fibers are approximately 1mm in diameter and their lengths exceed 15 and 0.3m, respectively. Both Ir and Ru fibers are composed of number of elongated grains oriented along a growth direction, which is attributable to the unidirectional solidification. The flexibility and oxidation resistance of the Ir fiber grown by the A--PD method is considerably improved as compared to a commercial Ir wire made by wire-drawing process.