Appearance of icosahedral atomic clusters in the formation of the (formula presented)-type structure from the bcc structure in Ti-Cr alloys

研究成果: Article査読

抄録

The (formula presented)-type structure, called the C15 structure, is one of the covalency-involved structures in alloys and is characterized by a three-dimensional network of the covalent tetrahedra of small majority atoms. In order to understand the formation of covalent bonds in alloys, the crystallographic features of the C15 structure in the (formula presented) reaction of the Ti-(30- and 40-at. %) Cr alloys have been examined by transmission electron microscopy. It was found that the C15 structure was formed from the metallic bcc structure via the formation of icosahedral atomic clusters. Based on the shape of the icosahedral cluster, the cluster should be produced as a result of the local formation of covalent bonds along one of the (formula presented) directions. It can thus be said that, in relation to the formation of the covalency-involved C15 structure from the metallic bcc structures, the local covalent bonds between two Cr atoms are first formed in the bcc matrix, and then that the local bonds are developed into the three-dimensional network of the covalent tetrahedra consisting of four Cr atoms.

本文言語English
ジャーナルPhysical Review B - Condensed Matter and Materials Physics
67
14
DOI
出版ステータスPublished - 2003 4 29

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • 凝縮系物理学

フィンガープリント

「Appearance of icosahedral atomic clusters in the formation of the (formula presented)-type structure from the bcc structure in Ti-Cr alloys」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