An Introductory Idea for Teaching Two-Component Phase Diagrams

Phase diagrams for diluted bulk magnetic alloys and two-component magnetic films are investigated. On the basis of the Ising model for layered structures, we calculate the transition temperature as a function of the relative concentration x by means of the variational cumulant expansion. Both the ferromagnetic and antiferromagnetic interactions are considered and the exchange coupling constants between different atoms are treated as adjustable parameters. Experimental phase diagrams in the Tc-x plane for both La 2 Cu 1-x Zn x O 4 and Sm 2 Fe 14-x Co x Si 2 are qualitatively accounted for, and phase diagrams for a randomly mixed two-component thin film of magnetic alloys are predicted.

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Effects of a Cooperative Learning Strategy on Teaching and Learning Phases of Matter and One-Component Phase Diagrams

Journal of Chemical Education ◽

10.1021/ed084p1857 ◽

2007 ◽

Vol 84 (11) ◽

pp. 1857 ◽

Cited By ~ 24

Author(s):

Kemal Doymus

Keyword(s):

Cooperative Learning ◽

Phase Diagrams ◽

Teaching And Learning ◽

Learning Strategy ◽

Component Phase

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Magic Numbers for Bimetallic Clusters

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.172-174.1038 ◽

2011 ◽

Vol 172-174 ◽

pp. 1038-1043 ◽

Cited By ~ 2

Author(s):

Isabelle Braems ◽

Fabienne Berthier

Keyword(s):

Size Distribution ◽

Ground State ◽

Cluster Size ◽

Cluster Size Distribution ◽

Bimetallic Clusters ◽

Magic Numbers ◽

Chemical Interactions ◽

Two Component ◽

Component Phase ◽

Exact Description

An exact description of the distribution of 2D bimetallic clusters deposited on a square substrate has been obtained via an exact inventory algorithm. We show that several features of the monometallic distribution can be altered by the presence of a second species within the clusters. The diagram of ground-state morphologies of such clusters is built as a function of the chemical interactions between both components. As a consequence, the maxima in the cluster size distribution that indicate the magic numbers can be smoothened or shifted during co-deposition as a function of the composition of the two-component phase.

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On the General Material Balance Equation(S) to Calculate Quasi-Binary Sections of Multi-Component Phase Diagrams

Archives of Metallurgy and Materials ◽

10.1515/amm-2016-0017 ◽

2016 ◽

Vol 61 (1) ◽

pp. 75-78

Author(s):

A. Dezső ◽

G. Kaptay

Keyword(s):

Phase Diagrams ◽

Balance Equation ◽

General Equation ◽

Material Balance ◽

Ternary Systems ◽

Balance Equations ◽

Material Balance Equation ◽

Component System ◽

General Material ◽

Component Phase

A general form of material balance equations to be used to calculate quasi-binary sections of multi-component phase diagrams is derived here. When this general equation is reduced to ternary systems, it coincides with those, given in the Thermo-Calc manual. For a k-component system, altogether only (k-2) such independent equations should be written from the list of k(k-1)/2 possible equations.

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