PRODUCTION AND CHARACTERIZATION OF THE INTERMETALLIC THERMOELECTRIC COMPOUND TiNiSn
Uma liga intermetálica dotada de propriedades termoelétricas foi sintetizada por Mechanical Alloying. Os pós elementares de alta pureza de Ti, Ni e Sn na composição de TiNiSn (uma liga Half Heusler) foram moídos por 4 horas. A evolução estrutural do material foi estudada por medidas de Difração de Raio X (DRX) e refinamentos de parâmetros estruturais pelo método de Rietveld. A estabilidade térmica do material foi investigada a partir de Calorimetria Diferencial de Varredura (CDV). Baseado no termograma da calorimetria, a amostra foi recozida nas temperaturas de 310˚C e 380˚C, seguido de resfriamento a ar. Após o recozimento, constatou-se a observação de duas novas fases.
PRODUCTION AND CHARACTERIZATION OF THE INTERMETALLIC THERMOELECTRIC COMPOUND TiNiSn
-
DOI: 10.37572/EdArt_1702510201
-
Palavras-chave: MECHANICAL ALLOYING, MOAGEM DE ALTA ENERGIA, TERMOELÉTRICO, HALF-HEUSLER, INTERMETÁLICO
-
Keywords: MECHANICAL ALLOYING; HIGH ENERGY BALL MILLING; THERMOELECTRIC; HALF HEUSLER; INTERMETALLIC
-
Abstract:
An intermetallic alloy with thermoelectric properties was synthesized through Mechanical Alloying. The high purity elemental powders of Ti, Ni and Sn at the composition of TiNiSn (a Half Heusler Alloy) was milled for 4 hours. The structural evolution was studied through X-Ray Diffraction measurements and refinement of structural parameters using the Rietveld method. The thermal stability of the material was investigated through Differential Scanning Calorimetry. Based on the thermal chart obtained by the DSC measurement, the sample was annealed at the temperatures of 310˚C e 380˚C, followed by air cooling. After the annealing, new phases were observed.
-
Número de páginas: 14
- Ernest Pedroza Araujo Silva
- Daniela Menegon Triches