Development of plastic elongation in nanocrystalline and amorphous Ni–W dual phase alloys by brushing technique

Nakayama, Shunichi; Adachi, Hiroki; Yamasaki, Tohru

doi:10.1016/j.jallcom.2014.12.209

Cited by 5 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…From these results, it was confirmed that the deposition of Ni-W on a copper reversing mold is effective for obtaining a film of about 20 µm thickness without any deterioration of its strength and ductility. (8)…”

Section: Double Electroplating In Liga Processmentioning

confidence: 99%

“…was applied, which can suppress the generation of voids and pits due to hydrogen bubbles. (4,8) The plating time was adjusted so that the film thickness was approximately 100 µm. The electrodeposited Ni-W microgears were immersed in HNO 3 solution to separate them from the brass substrate and the copper reversing mold.…”

Section: Second Electroforming (Replication) Processmentioning

confidence: 99%

“…In this study, the Ni-W electrodeposited alloy (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14) developed by Yamasaki and others, which showed high strength and ductility, has been applied to the LIGA process using synchrotron radiation to fabricate high-precision microgears with high durability. Ni-W electrodeposited alloys have nanocrystalline/amorphous composite structures with high plastic deformability despite their high strength.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Fabrication of Ni–W Microgears Using LIGA Process

Tamada¹,

Amano²,

Okamoto³

et al. 2021

Sensors and Materials

View full text Add to dashboard Cite

Microgears made of Ni-W alloy that are expected to have high strength and ductility, i.e., high durability, were successfully fabricated by using the LIGA process with synchrotron radiation. Ni-W electrodeposited alloys have a Vickers hardness of about HV 600 and a tensile strength of about 2000 MPa or above for a sample thickness of up to about 20 μm. However, they lose their excellent mechanical properties with increasing sample thickness. For this reason, Ni-W electrodeposited alloys have not yet been used in the LIGA process for the fabrication of microcomponents. We consider that the decrease in strength is due to the increased electric resistance of the Ni-W film during electrodeposition. To solve this problem, we developed a new process in which a copper reversing mold is fabricated in the first step, then Ni-W alloy is electrodeposited on the copper reversing mold to prevent the electric resistance from increasing in the second step as the mold forming process. Using this process, microgears with reference diameters from 1000 to 80 µm were fabricated with high dimensional accuracy.

show abstract

Section: Double Electroplating In Liga Processmentioning

confidence: 99%

Section: Second Electroforming (Replication) Processmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fabrication of Ni–W Microgears Using LIGA Process

Tamada¹,

Amano²,

Okamoto³

et al. 2021

Sensors and Materials

View full text Add to dashboard Cite

show abstract

Ni-W electrodeposited coatings: Characterization, properties and applications

Allahyarzadeh

Mahmood

Rezvanian

et al. 2016

Surface and Coatings Technology

214

View full text Add to dashboard Cite

Development of Electrodeposition Bath Using a Substitute of Propionic Acid for Bulk Nanocrystalline Ni-W Alloys with High Ductility

功

直紀

明軍

et al. 2016

J. Japan Inst. Metals and Materials

View full text Add to dashboard Cite

A substitute for propionic acid, which is a complexing agent in the Ni W electrodeposition process for producing bulk nanocrystalline alloys with high ductility, was explored. Bulk nanocrystalline Ni W alloys were electrodeposited using electrolyte that primarily consisted of nickel sulfamate and sodium tungstate with sodium propionate and/or sodium gluconate. Their W content, impurity contents, microstructure, and mechanical properties were investigated. The Ni W alloys electrodeposited from conventional bath exhibited tensile strength of 1.66 GPa and elongation of 6.5. Substitution of propionic acid by sodium propionate enhanced tensile elongation up to 11.3 along with high strength of 1.65 GPa. Also, substitution by sodium gluconate enhanced tensile strength up to 1.80 GPa with elongation of 5.2. The results of this study demonstrate that the propionic acid in the Ni W electrodeposition process can be replaced by sodium propionate without property degradation.

show abstract

Development of plastic elongation in nanocrystalline and amorphous Ni–W dual phase alloys by brushing technique

Cited by 5 publications

References 10 publications

Fabrication of Ni–W Microgears Using LIGA Process

Fabrication of Ni–W Microgears Using LIGA Process

Ni-W electrodeposited coatings: Characterization, properties and applications

Development of Electrodeposition Bath Using a Substitute of Propionic Acid for Bulk Nanocrystalline Ni-W Alloys with High Ductility

Contact Info

Product

Resources

About