Formation of porous layer with low Ni content on NiTi substrate by dealloying in metallic melts

Kyosuke Ueda, Ryuma Hashimoto, Masahiro Hirohashi, Takeshi Wada, Hidemi Kato, Takayuki Narushima

研究成果: Article査読

抄録

NiTi has been used in biomedical implants because of its shape memory effect and superelasticity. In this study, a dealloying process was applied to NiTi substrates to form porous surfaces with low Ni content. The NiTi substrates were immersed in Ce or Mg melts for dealloying Ni. The reaction layers were characterized by using SEM/EDX and XRD. Upon dealloying, a porous layer consisting of NiTi2 and α-Ti phases was obtained at the surface of the NiTi. The Ni content in the porous layer formed at the surface of the NiTi substrate decreased step-wise until it reached a value of 2.0 at%. The thickness of the porous layer obtained by using the Ce melt was higher than that obtained by using the Mg melt, which might be due to the high affinity of Ni with Ce. 1 mass% lactic acid solution was used as an eluent for eluting Ni ions from the reaction layers. Although the amount of Ni ions eluted from the reaction layer formed by using the Ce melt was higher than that eluted from the as-polished NiTi substrate, the amount of eluting Ni ions per unit area decreased. In the case of the reaction layer obtained by using the Mg melt, the amount of eluting Ni ions was comparable with that from the as-polished NiTi substrate.

本文言語English
ページ(範囲)766-770
ページ数5
ジャーナルFuntai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy
63
8
DOI
出版ステータスPublished - 2016 7

ASJC Scopus subject areas

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

フィンガープリント 「Formation of porous layer with low Ni content on NiTi substrate by dealloying in metallic melts」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル