An Electro-Assisted Powder Metallurgical Route for the Preparation of Porous Ti and NiTi in Molten CaCl{sub 2}

Journal Article · Mon Apr 15 04:00:00 EDT 2019 · Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science

DOI:https://doi.org/10.1007/S11663-019-01522-2· OSTI ID:22933640

Ma, Xue; Xie, Hongwei; Qu, Jiakang; Song, Qiushi; Ning, Zhiqiang; Zhao, Haijia; Yin, Huayi ^[1]

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1. Northeastern University, School of Metallurgy (China)

Molten salts can provide a high-temperature and oxygen-water-free environment, and the electrochemical polarization is able to reduce the oxide scale on the surface of Ti and Ni particles in molten salts and, thereby, enhance the sintering and accelerating atom diffusion between Ti and Ni. Thus, an electro-assisted powder metallurgical (EPM) approach was developed to prepare porous Ti and NiTi from metal powders in molten salts, where the porous pellet cathode made of the mixture of Ni and Ti powders is electrochemically polarized to facilitate the generation of the porous Ti and NiTi at a temperature lower than 1000 °C. The electrolytic product obtained under a cell voltage of 3 V for 12 hours is nearly pure NiTi with a tiny amount of undesired Ni{sub 3}Ti and NiTi{sub 2} phases. Overall, the EPM route could be a straightforward and general way to prepare porous Ti and Ti-alloys for implants and other applications.

• OSTI ID: 22933640
• Journal Information: Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science, Journal Name: Metallurgical and Materials Transactions. B, Process Metallurgy and Materials Processing Science Journal Issue: 2 Vol. 50; ISSN 1073-5615; ISSN MTBSEO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CALCIUM CHLORIDES
CATHODES
DIFFUSION
ELECTROCHEMISTRY
MOLTEN SALTS
NICKEL
OXIDES
OXYGEN
PELLETS
POLARIZATION
POROUS MATERIALS
POWDER METALLURGY
SINTERING
TEMPERATURE RANGE 0400-1000 K
TITANIUM ALLOYS