Structures and impurity effect on symmetric tilt boundaries of molybdenum

Koji Morita, Masato Uehara, Sadahiro Tsurekawa, Hideharu Nakashima

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In order to clarify the grain-boundary structure of molybdenum and influence of impurities on the microstructures, bicrystals with symmetric tilt boundary (〈001〉(130) ∑5, 〈001〈120) ∑5, 〈001〉 (140) ∑17, 〈001〉 (150) ∑13 and 〈110〉 (332) ∑11 coincidence boundaries) were prepared, and the boundary structures were observed by transmission electron microscopy. For the purified specimens, periodic structures were observed along the boundary, and well explained by geometric models (coincidence site lattice and O-lattice theories) for the periodicity and by molecular dynamics calculation for microstructures. It was found that the grain boundary structures consist of the combination of structure units of stable boundaries ((010) and (110) ∑1 single crystals, and (130) ∑5 coincidence boundary). On the other hand, in the not-purified specimens, precipitates and lattice bendings, which were probably caused by impurities, were observed at the boundaries. From these findings, it is concluded that impurities are one of the most important factors affecting the boundary structures in molybdenum. However, the effect was very different from each boundary.

Original languageEnglish
Pages (from-to)251-260
Number of pages10
JournalNippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals
Volume61
Issue number4
DOIs
Publication statusPublished - Jan 1 1997

Fingerprint

Molybdenum
molybdenum
Impurities
impurities
Grain boundaries
Lattice theory
Bicrystals
Microstructure
Periodic structures
Molecular dynamics
Precipitates
Single crystals
Transmission electron microscopy
grain boundaries
microstructure
bicrystals
periodic variations
precipitates
molecular dynamics
transmission electron microscopy

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Mechanics of Materials
  • Metals and Alloys
  • Materials Chemistry

Cite this

Structures and impurity effect on symmetric tilt boundaries of molybdenum. / Morita, Koji; Uehara, Masato; Tsurekawa, Sadahiro; Nakashima, Hideharu.

In: Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals, Vol. 61, No. 4, 01.01.1997, p. 251-260.

Research output: Contribution to journalArticle

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