Structure and mechanical properties of Ni-based porous superalloy |
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Authors: | Guofa Mi Hongyu Li Xiangyu Liu Songyan Zeng |
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Affiliation: | (1) Istituto di Scienza e Tecnologia dei Materiali Ceramici—Consiglio Nazionale delle Ricerche, ISTEC-CNR Via Granarolo 64, 48018 Faenza, RA, Italy;(2) Ceramics Laboratory, Materials Department, Swiss Federal Institute of Technology-EPFL, 1015 Lausanne, Switzerland; |
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Abstract: | The porous superalloy materials with hollow spherical and oriented linear pores were fabricated by means of powder metallurgy
using Ni-based superalloy powders. Structure observation revealed that the pores of the porous material exhibited uniform
distribution and the pores were of the same size in principle. The sintering necks created between adjacent particles on metal
skeleton after sintering. The porosity of the porous material increased with increasing the addition of pore forming agent,
and the hollow spherical porous material with a porosity of 81.62% were obtained when the addition of pore forming agent was
40%. The compression test indicated that this kind of materials possesses excellent, energy absorption capability and the
compression resistance decreased with the increasing of porosity and pore size. |
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Keywords: | |
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