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Phase selection in a mechanically alloyed Cu2013;In–Ga–Se powder mixture

Published online by Cambridge University Press:  31 January 2011

C. Suryanarayana ,
E. Ivanov ,
R. Noufi ,
M. A. Contreras  and
J.J. Moore
C. Suryanarayana
Affiliation:
Advanced Coatings and Surface Engineering Laboratory (ACSEL), Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colorado 80401-1887
E. Ivanov
Affiliation:
Tosoh SMD, Inc., Grove City, Ohio 43213-1895
R. Noufi
Affiliation:
National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, Colorado 80401-3393
M. A. Contreras
Affiliation:
National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, Colorado 80401-3393
J.J. Moore
Affiliation:
Advanced Coatings and Surface Engineering Laboratory (ACSEL), Department of Metallurgical and Materials Engineering, Colorado School of Mines, Golden, Colorado 80401-1887
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Abstract

Formation of a homogeneous nanocrystalline CuIn0.7Ga0.3Se2 alloy was achieved by mechanical alloying of blended elemental Cu, In, Ga, and Se powders in a planetary ball mill. X-ray diffraction and transmission electron microscopy and diffraction techniques were employed to follow the structural evolution during milling. It was observed that, depending upon the milling conditions, either a metastable cubic or a stable tetragonal phase was produced. The grain size of the mechanically alloyed powder was about 10 nm. The mechanically alloyed powder was consolidated to full density by hot isostatic pressing the powder at 750 °C and 100 MPa for 2 h. Irrespective of the nature of the phase in the starting powder, the hot isostatically pressed compact contained the well-recrystallized tetragonal CuIn0.7Ga0.3Se2 phase with a grain size of about 50 nm.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 2 , February 1999 , pp. 377 - 383
Copyright
Copyright © Materials Research Society 1999

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