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Spark Plasma Sintering and Characterization of NiCoCrAlY-Ta Superalloy Powder

Abstract : 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.
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Submitted on : Monday, June 29, 2015 - 2:01:47 PM
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  • HAL Id : hal-01169434, version 1
  • OATAO : 14123

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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, David Publishing, 2010, vol. 4 (n° 11), pp. 57-63. ⟨hal-01169434⟩

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