Phase selection in a mechanically alloyed Cu{endash}In{endash}Ga{endash}Se powder mixture
- Tosoh SMD, Inc., Grove City, Ohio 43213-1895 (United States)
- National Renewable Energy Laboratory, 1617 Cole Blvd., Golden, Colorado 80401-3393; Metals and Ceramics Division, Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6376 (United States)
Formation of a homogeneous nanocrystalline CuIn{sub 0.7}Ga{sub 0.3}Se{sub 2} 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&hthinsp;{degree}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 CuIn{sub 0.7}Ga{sub 0.3}Se{sub 2} phase with a grain size of about 50 nm. {copyright} {ital 1999 Materials Research Society.}
- OSTI ID:
- 341168
- Journal Information:
- Journal of Materials Research, Journal Name: Journal of Materials Research Journal Issue: 2 Vol. 14; ISSN JMREEE; ISSN 0884-2914
- Country of Publication:
- United States
- Language:
- English
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