Phase transformation study of Pb–Te powders during mechanical alloying

In this study PbTe thermoelectric material was prepared by mechanical alloying using a high energy planetary ball mill. The alloy formation and phase transformation during mechanical alloying was followed by X-ray diffraction (XRD) and differential scanning calorimetry (DSC), and the microscopic mor...

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Bibliographic Details
Published in:Journal of alloys and compounds 2003-04, Vol.353 (1), p.184-188
Main Authors: Bouad, N., Marin-Ayral, R.M., Nabias, G., Tédenac, J.C.
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Crystal structure
Exact sciences and technology
Materials science
Materials synthesis
materials processing
Materials testing
Mechanical alloying
Physics
Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation
Semiconductors
Thermal analysis
Thermal analysis, differential thermal analysis (DTA), differential thermogravimetric analysis
Thermoelectric
X-ray diffraction
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Summary:In this study PbTe thermoelectric material was prepared by mechanical alloying using a high energy planetary ball mill. The alloy formation and phase transformation during mechanical alloying was followed by X-ray diffraction (XRD) and differential scanning calorimetry (DSC), and the microscopic morphology was studied by scanning electron microscopy (SEM). Results show that mechanical alloying is associated with an exothermic reaction between lead and tellurium which promotes the rapid formation of lead telluride and leads to a reasonable milling time (3 h) to obtain PbTe stoichiometric samples.
ISSN:0925-8388
1873-4669
DOI:10.1016/S0925-8388(02)01179-9