Fabrication of Bulk Nanocrystalline Ni-W with Plastic Deformability Electrodeposited from a Sulfamate Bath

PRICM ◽  
2013 ◽  
pp. 3291-3296
Author(s):  
Isao Matsui ◽  
Yorinobu Takigawa ◽  
Tokuteru Uesugi ◽  
Kenji Higashi
Keyword(s):  
Bulk Nanocrystalline ◽  
Sulfamate Bath

High Tensile Ductility in Electrodeposited Bulk Nanocrystalline Ni–W Alloys

2014 ◽  
Vol 922 ◽  
pp. 497-502 ◽  
Author(s):  
Isao Matsui ◽  
Yorinobu Takigawa ◽  
Kenji Higashi
Keyword(s):  
Tensile Strength ◽  
Tensile Ductility ◽  
Nanocrystalline Structure ◽  
High Strength ◽  
Complexing Agent ◽  
Grain Sizes ◽  
Saccharin Sodium ◽  
Bulk Nanocrystalline ◽  
20 Nm ◽  
Sulfamate Bath

Bulk nanocrystalline Ni–W alloys were electrodeposited from a sulfamate bath that contained saccharin sodium as a gloss agent, and propionic acid and sodium gluconate as a complexing agent (SPG bath) to understand the tensile behavior. SPG bath with 1.0 and 5.0 g/L saccharin sodium at 45 ºC produced the bulk specimens with W content of 3.4 and 1.5 at.%, respectively. The electrodeposited alloys had a nanocrystalline structure with grain sizes of approximately 20 nm and a stronger (111) texture. The bulk nanocrystalline Ni–3.4 at.%W alloys deposited from an SPG bath with 1.0 g/L saccharin sodium exhibited a tensile strength of 1.6 GPa and tensile ductility of 1.8%. The bulk nanocrystalline Ni–1.5 at.%W alloys deposited from an SPG bath with 5.0 g/L saccharin sodium exhibited a tensile strength of 1.4 GPa and tensile ductility of 1.7%. The bulk nanocrystalline Ni–W alloys with a stronger (111) texture showed high strength and low plasticity.

Tensile Properties of Bulk Nanocrystalline Ni and Ni-W Fabricated by Sulfamate Bath

2010 ◽  
Vol 654-656 ◽  
pp. 1114-1117 ◽  
Author(s):  
Isao Matsui ◽  
Yorinobu Takigawa ◽  
Tokuteru Uesugi ◽  
Kenji Higashi
Keyword(s):  
Grain Size ◽  
Tensile Strength ◽  
High Strength ◽  
Brittle Behavior ◽  
Ni Alloys ◽  
Large Numbers ◽  
Plastic Deformation Behavior ◽  
Bulk Nanocrystalline ◽  
Reported Data ◽  
Sulfamate Bath

Nanocrystalline materials with high strength have been reported in large numbers. In particular, there has been considerable research on electrodeposited nanocrystalline Ni (nc-Ni) and nc-Ni alloys. However, reported data vary widely especially in ductility. Therefore, it is necessary to obtain the true characteristic value of nc-Ni and nc-Ni alloys. In the present study, nc-Ni and nc-Ni-W was electrodeposited under different conditions in order to obtained bulk nc-Ni and nc-Ni-W with high tensile strength and good ductility. At first, bulk nc-Ni-W was fabricated using a sulfamate bath. Although the resulting bulk nc-Ni-W had inhomogeneous grain size and W-concentration, this sample exhibited plastic deformation behavior. Then, nc-Ni was fabiricated by four types of sulfamate baths. As a result, the nc-Ni obtained from a sulfamate bath containg added saccharine and 2-butyne-1,4-diol exhibited brittle behavior. In contrast, bulk nc-Ni obtained from sulfamate bath with a grain size of about 60 nm exhibited a tensile strength of about 1000 MPa and ductility of 8.8 %.

Enhanced tensile ductility in bulk nanocrystalline nickel electrodeposited by sulfamate bath

2011 ◽  
Vol 65 (15-16) ◽  
pp. 2351-2353 ◽  
Author(s):  
Isao Matsui ◽  
Yorinobu Takigawa ◽  
Tokuteru Uesugi ◽  
Kenji Higashi
Keyword(s):  
Tensile Ductility ◽  
Nanocrystalline Nickel ◽  
Bulk Nanocrystalline ◽  
Sulfamate Bath

scholarly journals Influence of Gloss Agent Types on Tensile Properties of Bulk Nanocrystalline Ni Electrodeposited from Sulfamate Bath

2011 ◽  
Vol 62 (12) ◽  
pp. 686 ◽  
Author(s):  
Isao MATSUI ◽  
Hideaki IWAMI ◽  
Yorinobu TAKIGAWA ◽  
Tokuteru UESUGI ◽  
Kenji HIGASHI
Keyword(s):  
Tensile Properties ◽  
Bulk Nanocrystalline ◽  
Sulfamate Bath

Synthesis of bulk nanocrystalline HfB2 from HfCl4–NaBH4–Mg ternary system

2017 ◽  
Vol 52 (21) ◽  
pp. 12689-12705 ◽  
Author(s):  
Nazlı Akçamlı ◽  
Duygu Ağaoğulları ◽  
Özge Balcı ◽  
M. Lütfi Öveçoğlu ◽  
İsmail Duman
Keyword(s):  
Ternary System ◽  
Bulk Nanocrystalline
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