Formation of Amorphous ＆ Nanocrystalline Ni-W Alloys Produced by Electrodeposition and Their Mechanical Properties.

电沉积非晶和纳米晶镍钨合金的形成及其机械性能。

• 批准号: 09650793
• 负责人: YAMASAKI Tohru
• 金额: $ 2.24万
• 依托单位: Himeji Institute 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: 1997
• 资助国家: 日本
• 起止时间: 1997 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650793/
• 关键词: Electrodeposition; Ni-W Alloys; Amorphous; Nanocrystalline; Mechanical Properties; アモルファス合金; Fe-W合金; マイクロ部品用材料; 硬度

High-strength nanocrystalline Ni-W alloys were produced by electrodeoisition. The plating bath for the electrodeposition contained nickel sulfate, trisodium citrate, sodium tungstate and ammonium chloride, and was operated at various bath concentrations and conditions of electrolysis. The ductility and tensile strength of the deposited alloys are strongly influenced by inclusion of codeposited hydrogen during deposition process. After degassing the hydrogen, the high-strength nanocrystalline Ni-W alloy containing about 20.7 at.% W with an average grain size of about 3 nm has been obtained : the tensile strength attained to about 2300 MPa. The high ductility of this alloy was also observed : bending through an angle of 180 degree was possible without breaking. On annealing these materials at various temperatures, however, grain growth occurred and they lost their ductility. In order to estimate the critical grain size for keeping the good ductility in the nanocrystalline alloys, grain boundary sliding is considered to occur along the close-packed planes of the nanocrystalline grains under the condition where the nanoscaled spherical hard grains is represented as a densely packed array.

采用电沉积法制备了高强度纳米晶Ni-W合金。用于电沉积的镀浴含有硫酸镍、柠檬酸三钠、钨酸钠和氯化铵，并且在各种浴浓度和电解条件下操作。在沉积过程中，共沉积氢的夹杂物对沉积合金的塑性和抗拉强度有很大的影响。经除氢处理后，可获得含20.7at.%左右的高强度纳米晶Ni-W合金获得了平均晶粒尺寸约为3 nm的W，抗拉强度达到约2300 MPa。还观察到该合金的高延展性：可以弯曲180度而不断裂。然而，在不同温度下退火这些材料时，发生晶粒生长，并且它们失去了延展性。为了估计纳米晶合金保持良好延展性的临界晶粒尺寸，在纳米尺度球形硬颗粒表现为密集排列的情况下，认为晶界滑动沿着纳米晶颗粒的密集平面发生，其中纳米尺度球形硬颗粒表现为密集排列。沿着纳米晶颗粒的密集平面发生。

项目成果

T.Yamasaki, P.Schlossmacher and K.Ehrlich and Y.Ogino: "Formation or Amorphous Electrodeposited Ni-W Alloys and Their Nanocrystallization"Nano Structured Materials. Vol.10, No.3. 375-388 (1998)

T.Yamasaki、P.Schlossmacher、K.Ehrlich 和 Y.Ogino：“形成或非晶态电沉积 Ni-W 合金及其纳米结晶”纳米结构材料。

T.Yamasaki et al.: "Formation of Amorphous and Nanocrystalline Electrodeposited Ni-W Alloys and Their Mechanical Properties" Proc.of Advanced Materials-4 in Nagoya. 67-70 (1998)

T.Yamasaki 等人：“非晶态和纳米晶电沉积 Ni-W 合金的形成及其机械性能”Proc.of Advanced Materials-4，名古屋。

P.Schlossmacher and T.Yamasaki: "Structural Analysis of Electroplated Amorphous-Nanocrystalline Ni-W."Mikrochemica Acta. Vol.132. 309-313 (2000)

P.Schlossmacher 和 T.Yamasaki：“电镀非晶纳米晶 Ni-W 的结构分析”。Mikrochemica Acta。

T.Yamasaki, R.Tomohira and Y.Ogino: "Formation of Ductile Amorphous Ni-W and Fe-W Elecreodeposits and Their Nanocrystallization. "Proc.Int.Conf.on Solid-Solid Phase Transformations(JIMIS-3)Editated by M.Koiwa et al.,Japan Institute of Metals. 1247-1250 (1

T.Yamasaki、R.Tomohira 和 Y.Ogino：“延性非晶态 Ni-W 和 Fe-W 电沉积及其纳米结晶的形成。”Proc.Int.Conf.on 固-固相变 (JIMIS-3) 由 M 编辑

T. Yamasaki: "Properties of Amorphous Electrodeposited Ni-W Alloys after Heat Treatment" Proc. Int. Conf. of Micro Materials'97. 1. 654-657 (1997)

T. Yamasaki：“热处理后非晶电沉积镍钨合金的性能”Proc。