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Ir-based refractory superalloys by pulse electric current sintering (PECS) process (II prealloyed powder)

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Abstract

Five prealloyed powder samples prepared from binary Ir-based refractory superalloys were sintered at 1800 °C for 4 h by Pulse Electric Current Sintering (PECS). No metal loss was observed during sintering. The relative densities of the sintered specimens all exceeded 90% T.D. The best one was Ir-13% Hf with the density of 97.82% T.D. Phases detected in sintered samples were in accordance with the phase diagram as expected. Fractured surfaces were observed in two samples (Ir-13% Hf and Ir-15% Zr). Some improvements obtained by using prealloyed powders instead of elemental powders, which were investigated in the previous studies, were presented.

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Authors and Affiliations

  1. National Institute for Materials Science (NIMS), Sengen 1-2-1, Tsukuba, 305-0047, Ibaraki, Japan

    C. Huang, Y. Yamabe-Mitarai & H. Harada

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  1. C. Huang
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  2. Y. Yamabe-Mitarai
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  3. H. Harada
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Huang, C., Yamabe-Mitarai, Y. & Harada, H. Ir-based refractory superalloys by pulse electric current sintering (PECS) process (II prealloyed powder). J. of Materi Eng and Perform 11, 32–36 (2002). https://doi.org/10.1007/s11665-002-0005-3

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  • DOI: https://doi.org/10.1007/s11665-002-0005-3

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