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.

高强度的纳米晶体Ni-W合金是通过电去发射产生的。电沉积的电镀浴中含有硫酸盐，柠檬酸三硫酸盐，钨钠和氯化铵，并在各种浴室浓度和电解状况下运行。沉积合金的延展性和拉伸强度受到沉积过程中连接的氢气的强烈影响。脱气后，获得了大约20.7 at。％w的高强度纳米晶体Ni-W合金，平均晶粒尺寸约为3 nm：张力强度达到约2300 MPa。还观察到了这种合金的高延展性：在不断裂的情况下，可以通过180度角弯曲。但是，在各种温度下退火时，谷物的生长发生了，它们失去了延展性。为了估计临界晶粒尺寸，以保持纳米晶合金中的良好延展性，在纳米级的球形硬晶粒的条件下，认为晶界滑动被认为沿着纳米晶晶粒的紧密填充平面发生，以表示密集的堆积阵列。

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。