Spark Plasma Sintering and Characterization of NiCoCrAlY-Ta Superalloy Powder

Jose Manuel Juarez García (1) , Zhong Li (2) , Constantin Vahlas (3) , Sebastián Díaz de La Torre (1) , Fernando Juárez López (1)

1 IPN - Instituto Politecnico Nacional [Mexico]
2 University of Toronto
3 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux

In the present study, the spark plasma sintering technique is used to densify commercial alloy NiCoCrAlY-Ta. Such powder was sintered at temperatures ranging between 900 and 1050 °C to yield various microstructures. Full compaction is achieved in a short time and the overall processing duration does not exceed 30 min. Microestructural and porosity evaluation was investigated by using scanning electron microscopy and chemical analysis. Two phases, β and γ, were identified in sintered microstructure by XR-diffraction. Micro Vickers tests were carried out on the sintered specimens, the resultant properties at room temperature are very promising whereas major hardness resistance was obtained at 1000 °C.

Mots clés: Spark plasma sintering; NiCoCrAlY-Ta; Powder

Domaines: Matériaux

Jose Manuel Juarez García, Zhong Li, Constantin Vahlas, Sebastián Díaz de La Torre, Fernando Juárez López. Spark Plasma Sintering and Characterization of NiCoCrAlY-Ta Superalloy Powder. Journal of Materials Science and Engineering, 2010, vol. 4 (n° 11), pp. 57-63. ⟨hal-01169434⟩