REPARATION OF FINE WIRES OF HYDROGEN STORAGE ALLOY WITH FINE CRYSTAL GRAIN BY THE IN-ROTATING-WATER SPINNING METHOD

水内旋转纺丝法修复细晶粒储氢合金细丝

• 批准号: 11555060
• 负责人: HONDA Hiroshi
• 金额: $ 8.64万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11555060/
• 关键词: Hydrogen Storage Alloy; Rapid Solidification; In-Rotating-Water Spinning Method; Immersion Cooling; Fine Wire; Crystalline Size Control

Studies were conducted to prepare a fine wire of hydrogen storage alloy by the In-Rotating-Water Spinning Method. In the first fiscal year, preliminary tests were conducted to melt alloy samples in a nozzle by induction heating and to eject the melt through the nozzle by argon back pressure. A Mm-Ni based alloy system and two Ti-Zr based alloy systems were employed as the test materials. A quartz nozzle with the mouth diameter of 0.25 mm was used. The capacity of a high-frequency induction heating apparatus(200 kHz, 5kW) was large enough to melt the Mm-Ni based alloy system but it was not enough for the Ti-Zr based alloy systems. The melt of Mm-Ni based alloy did not eject through the nozzle when the back pressure of 0.35 MPa was pressed by argon gas. This was due to the existence of slug in the melt formed by the reaction with the quartz nozzle. Then, nozzles made of carbon and alumina were tested. However, both of them were not satisfactory for the present purpose. A theoretical stud … More y on the occurrence of the minimum-heat-flux point that plays an important role during the rapid quenching process was also conducted. In the second fiscal year, an induction heating apparatus with a larger frequency(400 kHz, 5 kW) and a new induction coil were introduced. The mouth diameter of the quartz nozzle was changed to 0.5 mm. The test alloy was also changed to LaNi_5. The LaNi_5 alloy of 3 g was heated to 1450 ℃ in the nozzle and was completely melted. Then it was injected into the water layer of 1.5 mm in depth that was formed on the inside surface of a drum rotating at a velocity of 7 m/s and rapidly solidified. The geometrical shape of the product was about 30-cm long wires of 0.15 to 0.5 mm in diameter, ribbons with different lengths, or small droplets. The optimum back pressure for obtaining a thin wire was 0.3 MPa. The PCT diagram of the product showed a steeper pressure plateau than the ingot and the hydrogen-storage capacity decreased to about 70% of the latter. It was also found that the sample of alloy that was melted and then solidified gradually in quartz nozzle showed the PCT diagram similar to that of the product. The SEM view and the composition analysis by ESCA of the product showed that 2 μm thick layer of oxide was formed on the surface. However, this amount was small enough. Thus the bulk of the product was considered to be oxidized in the quartz nozzle during the melting process. According to the EPMA analysis, Ni was observed at the surface of the product. However, the composition of inner part was the same as the ingot. These results indicated that the reaction of the melt with the nozzle surface should be minimized to prevent the deterioration of the PCT characteristics. Less

进行了研究，以通过识别来制备氢储存方法高频指示的加热设备（200 kHz，5kW）足够大，可以熔化基于MM-NI的，但对于基于TI-ZR的合金系统，它并没有弹出0.35 MPA的喷嘴。由氩气榨出来的，由石英喷嘴形成的熔体和氧化铝。在第二会计年度，在快速pr量中起着重要作用的热量升温点，具有更大的自由的行业仪器（400 kHz，5 kW）和新的指示卷。更改为0.5毫米。在喷嘴中将3 g的LANI_5合金加热到1450°C，并完全融化。 7 m/s和快速固化。乘积的图显示了陡峭的压力，而氢储存的能力降低到uartz喷嘴的70％。根据EPMA分析，在熔化过程中被认为是在石英NO中氧化的。最小化以降低PCT特性的恶化

项目成果

H.Honda, H.Yamashiro and H.Takamatsu: "Stability of Vapor Film in Subcooled Film Boiling on a Shere"Proc.34th National Heat Transfer Conference, Pittsburgh. NHTC2000-12003. 1-10 (2000)

H.Honda、H.Yamashiro 和 H.Takamatsu：“谢尔过冷薄膜沸腾中蒸气薄膜的稳定性”Proc.34th 全国传热会议，匹兹堡。

H.Honda, H.Tamashiro and H.Takamatsu: "Linear Stability Analysis of Vapor Film during Subcooled Film Boiling on a Sphere"Theram Science and Engineering. 7-5. 1-10 (1999)

H.Honda、H.Tamashiro 和 H.Takamatsu：“球体过冷膜沸腾过程中蒸气膜的线性稳定性分析”Theram 科学与工程。

H.Honda, H.Yamashiro and H.Takamatsu: "Stability of Vapor Film in Subcooled Film Boiling on a Shere"Proc.34th Natinal Heat Transfer Conf.. NHTC2000-120003. 1-10 (2000)

H.Honda、H.Yamashiro 和 H.Takamatsu：“谢尔过冷膜沸腾中蒸气膜的稳定性”Proc.34th Natinal Heat Transfer Conf. NHTC2000-120003。

本田博司、山城光、高松 洋: "球まわりの過冷膜沸騰における蒸気膜の安定性"Thermal Science and Engineering. 7巻・5号. 1-10 (1999)

Hiroshi Honda、Hikaru Yamashiro、Hiroshi Takamatsu：“围绕球体沸腾的过冷膜中的蒸汽膜的稳定性”热科学与工程，第 7 卷，第 5 期。1-10 (1999)

本田博司 山城光、高松 洋: "Stability of Vapor Film in Subcooled Film Boiling on a Sphere"Thermal Science and Engineering. 7巻5号. 1-10 (1999)

Hiroshi Honda、Hikaru Yamashiro、Hiroshi Takamatsu：“球体过冷薄膜沸腾中的蒸气薄膜的稳定性”热科学与工程，第 7 卷，第 5 期。1-10 (1999)