Fabrication and corrosion behavior of Ti-based bulk metallic glass composites containing carbon nanotubes

Chih Feng Hsu, Wu Kai, Hong Ming Lin, Chung Kwei Lin, Pee Y. Lee

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

This study explored the feasibility of preparing Ti50Cu 28Ni15Sn7 bulk metallic glass composite with powder metallurgy. With high energy ball milling of a pure Ti, Cu, Ni, Sn and carbon nanotube (CNT) powder mixture, the CNT/Ti50Cu 28Ni15Sn7 metallic glass composite powders can be formed with mechanical alloying (MA) after 8 h milling. The bulk metallic glass composite was successfully prepared by vacuum hot pressing the as-milled CNT/Ti50Cu28Ni15Sn7 metallic glass composite powders. The corrosion behavior of the Ti50Cu 28Ni15Sn7 bulk metallic glass as well as composites modified by the addition of CNT was investigated by electrochemical measurements. Electrochemical characterization was performed in Hanks' solution at 37 °C with physiologically relevant dissolved oxygen content. The results of potentiodynamic polarization measurements revealed that the Ti-based bulk metallic glass composites examined showed spontaneous passivity by anodic polarization with a passive current density of about 10-5 A/cm 2. The higher corrosion resistance of the Ti-based bulk metallic glass composites was attributed to stable and protective passive films enriched with titanium containing certain amounts of additional elements.

Original languageEnglish
JournalJournal of Alloys and Compounds
Volume504
Issue numberSUPPL. 1
DOIs
Publication statusPublished - Aug 2010
Externally publishedYes

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Keywords

  • Bulk metallic glass composite
  • Corrosion resistance
  • Mechanical alloying
  • Supercooled liquid region
  • Vacuum hot pressing

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Chemistry
  • Metals and Alloys

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