PRODUCTION OF Ag-(Bi, Pb, Tl) -Al ALLOYS' FIBER AND CONTROL OF THEIR SOLIDIFICATION STRUCTURES

Ag-(Bi,Pb,Tl)-Al合金纤维的制备及其凝固组织的控制

• 批准号: 13650805
• 负责人: SHIMAOKA Mitsuyoshi
• 金额: $ 2.18万
• 依托单位: Nara National College of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650805/
• 关键词: FIBER PRODUCTION; IN-ROTATING-WATER-SPINNING METHOD; SOLIDIFICATION STRUCTURE CONTROL; SILVER; BISMUTH; LEAD; THALLIUM; ALUMINIUM; 銀(Ag); ビスマス(Bi); 鉛(Pb); タリウム(Tl); アルミニウム(Al); 連続細線製造; デンドライト2次アーム間隔; 回転水中紡糸; 平均冷却速度

The control of the solidification structure of a metal alloy that is closely connected with the mechanical property is very important. For alloys with very wide solidification temperature range above 550K such as Silver-Bismuth (Ag-Bi), Silver-Lead (Ag-Pb) and Silver-thallium (Ag-Tl) binary alloys, also the development of continuous fiber production by the In-Rotating-Water-Spinning process is very expected. Because the equilibrium phase diagrams of these three alloys show striking similarities, the standardization of the relation between the solidification microstructure and the cooling rate was tried. Aluminium improves the formability of an oxide film around the melt jet. The effect of addition of a small amount of Al into these three binary alloys on the spinnability was examined. Dendritic structures were observed in Ag-(5-30at%)Bi alloys, Ag-(5-30at%)Pb alloys and Ag-(5-30at%)Tl alloys. The relation between the secondary dendrite arm spacing and the mean cooling rates during soli … More dification interval were expressed as a function of the concentration of the solute atom that is Bi, or Pb, or Tl. The range of the secondary dendrite arm spacing was from 5 to 50mm corresponding to the cooling rates from 2 -50K/s. The dendritic structures of the ternary alloys containing Al were observed more clearly. The solidification temperature ranges of these three ternary alloys containing under 2at% Al decreased but those of the alloys containing over 5at% Al increased. The Micro-Vickers hardness of these three binary alloys decreased from 50 to 10 with increasing the concentration of the solute atom that is Bi, or Pb, or Tl in each binary alloy. Ag-Bi-5at%Al, Ag-Pb-5at%Al and Ag-Tl-5at%Al ternary alloys were superior to the binary alloys that do not include Al in spinnability. In the case of (Ag-5Pb)-5at%Al alloy, the continuous fiber of about 1m in length was produced at the spinning conditions of 0.075mm in nozzle diameter and of about 0.53rad in ejection angle of the melt jet into the rotating water layer. However in other spinning conditions and in other alloys, the maximum length of the obtained fiber was about 200mm. Less

金属合金的凝固组织与其力学性能密切相关，控制其凝固组织是非常重要的。对于凝固温度在550K以上的合金，如银-铋(Ag-Bi)、银-铅(Ag-Pb)、银-铊(Ag-Tl)等二元合金，采用旋转水纺法生产连续纤维也是非常有希望的。由于这三种合金的平衡相图具有显著的相似性，因此尝试了凝固组织与冷却速度之间关系的标准化。铝改善了熔体喷射周围的氧化膜的成形性。研究了在这三种二元合金中添加少量Al对可旋性的影响。在Ag-(5-30at%)Bi合金、Ag-(5-30at%)Pb合金和Ag-(5-30at%)Tl合金中观察到树枝晶结构。Soli…过程中二次枝晶间距与平均冷却速度的关系更多的固化间隔被表示为溶质原子浓度的函数，即Bi、Pb或Tl。二次枝晶间距范围为5~50 mm，对应的冷却速度为2~50K/S，发现含Al三元合金的枝晶组织更加清晰。Al含量低于2at%的三元合金的凝固温度范围减小，而Al含量高于5at%的合金的凝固温度范围增大。这三种二元合金的显微维氏硬度随着每个二元合金中溶质原子含量的增加而从50下降到10。Ag-Bi-5AT%Al、Ag-Pb-5AT%Al和Ag-Tl-5AT%Al三元合金的可旋性优于不含Al的二元合金。对于(Ag-5Pb)-5AT%Al合金，在喷嘴直径为0.075 mm，熔体喷射到旋转水层的喷射角约为0.53拉德的纺丝条件下，可获得长度约为1m的连续纤维。然而，在其他纺丝条件和其他合金中，所获得的纤维的最大长度约为200 mm。较少

项目成果

島岡三義, 田中友基, 杉原新一: "Ag-BiとAg-Pb二元合金の凝固組織とマイクロビッカース硬さ"奈良工業高等専門学校研究紀要. 38. 21-27 (2003)

Miyoshi Shimaoka、Yuki Tanaka、Shinichi Sugihara：“Ag-Bi 和 Ag-Pb 二元合金的凝固结构和显微维氏硬度”奈良工业大学研究公报 38. 21-27 (2003)。

MITSUYOSHI SHIMAOKA, TOMOKI TANAKA, SHIN-ICHI SUGIHARA: "SOLIDIFICATION STRUCTURES OF AG-BI AND AG-PB BINARY ALLOYS AND THIER MICRO-VICKERS HARDNESS"RESEARCH REPORTS OF NARA NATIONAL COLLEGE OF TECHNOLOGY. 38. 21-27 (2003)

MITSUYOSHI SHIMAOKA、TOMOKI TANAKA、Shin-ichi Sugihara：“AG-BI 和 AG-PB 二元合金的凝固结构及其显微维氏硬度”奈良国立工业大学的研究报告。

島岡三義, 田中友基, 杉原新一: "Ag-BiとAg-Pb二元合金の凝固組織とマイクロビッカース硬さ"奈良工業高等専門学校研究紀要. 第38号. 21-27 (2003)

Miyoshi Shimaoka，Yuki Tanaka，Shinichi Sugihara：“Ag-Bi和Ag-Pb二元合金的凝固结构和显微维氏硬度”奈良工业大学研究公报第38. 21-27号（2003年）。