Effect of Ceramics Addition on Formation Tendency of Amorphous Phase in La<SUB>55</SUB>Al<SUB>25</SUB>Ni<SUB>20</SUB> Alloy

• Haibara Teruo

  Advanced Technology Research Laboratories, Nippon Steel Corporation

• Ozaki Kimihiro

  Material Processing Department, National Industrial Research Institute of Nagoya

• Kobayashi Keizo

  Material Processing Department, National Industrial Research Institute of Nagoya

• Nishio Toshiyuki

  Material Processing Department, National Industrial Research Institute of Nagoya

• Miwa Kenji

  Material Processing Department, National Industrial Research Institute of Nagoya

Bibliographic Information

Other Title

• Effect of Ceramics Addition on Formation Tendency of Amorphous Phase in La55Al25Ni20 Alloy
• Effect of Ceramics Addition on Formatio

Abstract

The effect of additional ceramic powder on the formation tendency of an amorphous phase in a La₅₅Al₂₅Ni₂₀ alloy was investigated by water quenching of a molten alloy. The specimens were 12 mm in diameter and 6 mm thick. In the alloy without ceramic powder, the amorphous phase forms only near the surface of the specimen. By the addition of 6 vol% TiB₂ powder, it was possible to produce a homogeneous alloy specimen with amorphous and crystalline phases. In order to analyze the role played by ceramic powder in this process, various kinds of ceramic powders were added. TiC powder played the same role as TiB₂ powder in this process, but TiN and ZrB₂ powders did not. A crystalline phase about 20 μ in thickness was observed at the surface of TiB₂ in the optical microstructure. By EPMA, this crystalline phase was confirmed to have a composition of poorer La and richer Al, Ni than the matrix phase. Since the crystal preferentially nuclcate at TiB₂ surface and grows slowly, the matrix phase would easily form an amorphous state.

Journal

• Materials Transactions, JIM

  Materials Transactions, JIM 39 (4), 492-498, 1998

  The Japan Institute of Metals

Keywords

• amorphous alloy
• lanthanum-aluminum-nickel alloy
• titanium boride
• amorphous alloy matrix composite
• rapid solidification
• water quenching
• image processing analysis

Details

• CRID: 1390001204247384704
• NII Article ID: 130003557024
• NII Article ID: 10003802499
• NII Book ID: AA10699969
• DOI: 10.2320/matertrans1989.39.492
• COI: 1:CAS:528:DyaK1cXjs1yjsbg%3D
• ISSN: 2432471X
• ISSN: 09161821
• NDL BIB ID: 4483598
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4483598
• Web Site: https://www.jstage.jst.go.jp/article/matertrans1989/39/4/39_4_492/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed