Physical Properties of Deposits Obtaining from Boric Acid Free Sulfamate Ni Bath

Nakamaru, Yaichirou; Wakuda, Yohei; Tashiro, Katsuhiko; Watanabe, Mitsuhiro; Honma, Hideo

doi:10.4139/sfj.59.133

Cited by 8 publications

(1 citation statement)

References 4 publications

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“…In general, electrodepositon bath based nickel sulfate lead to larger internal stress than that based nickel sulfamate in the coatings. 12) Problem with bulk nc-Ni deposits is that they suffer from relatively high internal stress, which can give rise to warped shape and crack occurrence in the electrodeposits. 26) So, strongly-warped specimens generated from electrodeposition could be expected to have a large volume fraction of defect and exhibit no plastic deformability.…”

Section: Discussionmentioning

confidence: 99%

Influence of Bath Composition on Tensile Ductility in Electrodeposited Bulk Nanocrystalline Nickel

et al. 2011

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We investigated the influence of bath composition on characteristics in an electrodeposited bulk nanocrystalline Ni (nc-Ni). This study was aim to establish the fabrication process of bulk nc-Ni with good tensile property. The bulk nc-Ni was electrpdeposited from a sulfate bath and a sulfamate bath. The nc-Ni was evaluated for microstructure and mechanical properties, such as microhardness, tensile strength. As a result, bulk nc-Ni obtained from a sulfamate bath exhibited enhanced tensile property (ultimate tensile strength of 1006 MPa and ductility of 8.8%) compared to that obtained from a sulfate bath. Dimple pattern was observed in fracture surface of bulk nc-Ni obtained from a sulfamate bath. However, dimple pattern and brittle fracture surface were observed in bulk nc-Ni obtained from a sulfate bath. We consider the ductility of electrodeposited nc-Ni was influenced by internal stress generated from electrodepostion. These experiments and analyses suggest that it is important to control internal stress on fabrication of bulk nc-Ni with high tensile strength and good ductility.

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Section: Discussionmentioning

confidence: 99%

Influence of Bath Composition on Tensile Ductility in Electrodeposited Bulk Nanocrystalline Nickel

et al. 2011

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Stress control in high speed nickel plating by use of step control current

Kirihara

Umeda

Tashiro

et al. 2014

Transactions of the IMF

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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

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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.

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Physical Properties of Deposits Obtaining from Boric Acid Free Sulfamate Ni Bath

Cited by 8 publications

References 4 publications

Influence of Bath Composition on Tensile Ductility in Electrodeposited Bulk Nanocrystalline Nickel

Influence of Bath Composition on Tensile Ductility in Electrodeposited Bulk Nanocrystalline Nickel

Stress control in high speed nickel plating by use of step control current

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

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