Título

SINTERING-DISSOLUTION PROCESS FOR MANUFACTURING NI-625 SUPERALLOY FOAMS

SINTERING-DISSOLUTION PROCESS FOR MANUFACTURING NI-625 SUPERALLOY FOAMS

Autoria

Unver, Ismail; Gulsoy, Hamit Özkan; Aydemir, Bulent

DOI

10.5151/2594-5327-20880

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Resumo

In this work, porous Ni-625 superalloy was produced by use of a water soluble pore forming agent prior to sintering. Carbamide particles were used as the space holder material. After mixing and compaction the space holder particles were extracted using warm water leaching over a range of temperatures. The porous green parts were subsequently thermally debound to remove the paraffin wax under a pure Argon atmosphere, and subsequently sintered at high vacuum. The effects of volume fraction of space holder particles on density (porosity) and elastic modulus were investigated. Microstructures were captured using optical and scanning electron microscopy (SEM). Pore size was quantified using image analysis software integral to the SEM. In addition, compression tests were conducted on the sintered samples.

 

In this work, porous Ni-625 superalloy was produced by use of a water soluble pore forming agent prior to sintering. Carbamide particles were used as the space holder material. After mixing and compaction the space holder particles were extracted using warm water leaching over a range of temperatures. The porous green parts were subsequently thermally debound to remove the paraffin wax under a pure Argon atmosphere, and subsequently sintered at high vacuum. The effects of volume fraction of space holder particles on density (porosity) and elastic modulus were investigated. Microstructures were captured using optical and scanning electron microscopy (SEM). Pore size was quantified using image analysis software integral to the SEM. In addition, compression tests were conducted on the sintered samples.

Palavras-chave

Superalloys; Metal foam; Sintering.

Superalloys; Metal foam; Sintering.