Spinodal decomposition ranges of AlXGa1–XNyP1–y and AlXGa1–XNySb1–y alloys
S.F. Díaz Albarrána, V.A. Elyukhinb
a Escuela Superior de Ingeniería Mecánica y Eléctrica, Instituto Politécnico Nacional, Avenida Sta. Ana 1000 México, Distrito Federal, 04430, México.
b Departamento de Ingeniería Eléctrica-SEES, CINVESTAV-IPN, Avenida IPN, 2508, México, Distrito Federal, 07360, México.
]]> Recibido el 3 de marzo de 2005.
Abstract
Spinodal decomposition ranges of low N-content AlXGa1–XNyP1–y and AlXGa1–XNySb1–y alloys grown on GaP (001) and GaSb (001) substrates, respectively, are described. The alloys are considered according to the strictly regular approximation. In the analysis we take into account the transformations of the bonds and strain, coherency strain, and elastic energies. The spinodal decomposition ranges of the alloys with compositions 0 ≤ x ≤ 0.4, 0 ≤ y ≤ 0.05 are demonstrated up to temperatures of 1100 °C. It is shown that the enlargement of Al and N concentrations dramatically increases the phase separation temperature.
Keywords: III-V quaternary alloys; Spinodal decomposition.
Resumen
Se describe un rango de descomposición espinodal de las aleaciones AlXGa1–XNyP1–y y AlXGa1–XNySb1–y con bajos contenidos de N crecidas sobre los substratos GaP (001) y GaSb (001), respectivamente. Las aleaciones son consideradas en la aproximación de estrictamente regular. En el análisis de los rangos de descomposición espinodal de las aleaciones, se consideró la transformación de enlaces y deformación, deformación de coherencia y las energías elásticas. Se muestran los rangos de descomposición espinodal de las aleaciones con composiciones 0 ≤ x ≤ 0.4, 0 ≤ y ≤ 0.05 hasta 1100°C. Se muestra que el aumento en las concentraciones de Al y N incrementa dramáticamente la temperatura de las separaciones de fase.
Descriptores: Aleaciones cuaternarias de compuestos III-V; descomposición espinodal.
]]>PACS: 81.05.Ea; 64.75.+g
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