Application of Electroforming Process to Bulk Amorphous Ni-W Alloy

作者：Takigawa Yorinobu^*; Wakayama Shin; Matsui Isao; Uesugi Tokuteru; Higashi Kenji

来源：Materials Transactions, 2011, 52(1): 37-40.

DOI：10.2320/matertrans.M2010288

• bulk amorphous nickel-tungsten alloy
• electroforming process
• homogeneity
• compressive strength

Homogeneous bulk amorphous Ni-W alloy with thickness of more than 2 mm is fabricated by an electroforming process. By suppressing the side reaction and by preserving the mass balance between consumed ions by electrodeposition and supplemented ions by the solution of Ni and W anodes in the electroforming system, the standard deviation of W-concentration throughout the specimen is kept to 1.3 at%. As the result of micro-Vickers hardness tests, the standard deviation of micro-hardness decreases about 90% in bulk materials in comparison with thin-film materials fabricated by conventional electroforming process. This result indicates that it is important to minimize the fluctuation of W-concentration in the specimen for obtaining the micrometer-scale high reliability of hardness. The compressive strength of bulk amorphous Ni-W alloy is about 2.7 GPa. High compressive strength of amorphous Ni-W alloy can be clearly shown. [doi;10.2320/matertrans.M2010288]

• 出版日期2011-1