Dual-cluster model of Ti–Cu binary eutectic and composition interpretation of relevant amorphous alloys
Source abstract
Abstract
Glass formation is usually related to deep eutectic points. The present work addresses the composition interpretation of eutectic Ti57Cu43 and relevant bulk metallic glasses (BMGs) by introducing the “dual-cluster” model. In this model, the eutectic liquid structure is presumably composed of two chemical units derived from relevant eutectic phases, each corresponding to a stable liquid satisfying a general cluster formula for ideal metallic glasses [cluster](glue atom)1or3 in terms of the cluster-plus-glue-atom model. Detailed procedures are introduced to apply this model in interpreting the eutectics, based on which eutectic Ti57Cu43 is interpreted as dual-cluster formulas of 2{[Ti–Cu6Ti8]Cu3} + [Ti–Cu5Ti9]Ti3 and 2{[Ti–Cu6Ti8]Cu2Ti} + [Ti–Cu5Ti9]Cu2Ti, where the two clusters [Ti–Cu6Ti8] and [Ti–Cu5Ti9] are, respectively, derived from eutectic phases TiCu and Ti2Cu. Two interpretations are equivalent, and one of the involved chemical units [Ti–Cu6Ti8]Cu3 = Ti50Cu50 is a basic unit for multicomponent Ti–Cu-based BMGs; typical BMGs are formed by replacing the atoms in the basic unit with alloying ones.
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Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Physical Science and Technology, Dalian University 1 , Dalian 116622, China
School of Materials Science and Engineering, Dalian Jiaotong University 2 , Dalian 116028, China
Key Laboratory for Materials Modification by Laser, Ion and Electron Beam (Dalian University of Technology), Ministry of Education 3 , Dalian 116024, China
Funding
National Natural Science Foundation of China · Research Fund from the Laboratory of Science and Technology on Surface Physics and Chemistry · State Key Lab of Advanced Metals and Materials · The Key Discipline and Major Project of Dalian Science and Technology Innovation Foundation
References (38)
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