Microstructure Feature of Bulk Glassy Cu<SUB>60</SUB>Zr<SUB>30</SUB>Ti<SUB>10</SUB> Alloy in As-cast and Annealed States

• Chen Yantang

  Inoue Superliquid Glass Project, ERATO

• Zhang Tao

  Institute for Materials Research, Tohoku University

• Zhang Wei

  Inoue Superliquid Glass Project, ERATO

• Ping Dehai

  Materials Physics Division, National Institute for Materials Science

• Hono K.

  Materials Physics Division, National Institute for Materials Science

• Inoue Akihisa

  Institute for Materials Research, Tohoku University

• Sakurai Toshio

  Institute for Materials Research, Tohoku University

Bibliographic Information

Other Title

• Microstructure Feature of Bulk Glassy Cu60Zr30Ti10 Alloy in As-cast and Annealed States

Abstract

The microstructures of a bulk glassy Cu₆₀Zr₃₀Ti₁₀ alloy in as-cast state and annealed at glass transition temperature (T_g), i.e., 440°C, have been studied using an electron transmission microscope (TEM) and a high-resolution transmission electron microscope (HRTEM). Nanocrystals with a size of 4 nm were observed in the cast rod with a diameter of 4 mm. The nanocrystal was determined to be CuZr, which is primitive cubic structure with a lattice parameter of a=0.3262 nm by analyzing its nano-beam electron diffraction pattern, suggesting that such nanocrystals have a positive effect on mechanical properties. Obviously distinguished interval dark and bright regions were observed in the glassy Cu₆₀Zr₃₀Ti₁₀ alloy annealed for 10 min at T_g. Nanocrystalline phase with a size of ∼10 nm was recognized after the annealing treatment. The concentration distribution of Cu, Zr and Ti in the alloy annealed for 10 min at T_g was examined with a three-dimensional atom probe field ion microscopy (3DAP-FIM). It was found that the Cu and Zr elements fluctuated along depth direction while the Ti element remained almost unchanged. It is therefore interpreted that the annealing-induced nanocrystalline phase results from nucleation and growth at the sites of the Cu-rich and/or Zr-rich regions as well as from growth of the cast-in nanocrystals.

Journal

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 43 (10), 2647-2650, 2002

  The Japan Institute of Metals and Materials

Keywords

• microstructure
• glassy Cu<SUB><I>60</I></SUB>Zr<SUB><I>30</I></SUB>Ti<SUB><I>10</I></SUB> alloy
• cast
• anneal
• glass transition temperature

Details

• CRID: 1390001204248441728
• NII Article ID: 130004451701
• NII Article ID: 10012327610
• NII Book ID: AA1151294X
• DOI: 10.2320/matertrans.43.2647
• COI: 1:CAS:528:DC%2BD38XptVyksb4%3D
• ISSN: 13475320
• ISSN: 13459678
• NDL BIB ID: 6341698
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I6341698
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/43/10/43_10_2647/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed