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首页> 外文期刊>Journal of Materials Engineering and Performance >First trial of pulse electric current sintering for high-temperature material Ir{sub}3 Nb
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First trial of pulse electric current sintering for high-temperature material Ir{sub}3 Nb

机译：高温材料Ir {sub} 3 Nb脉冲电流烧结的首次尝试

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摘要

Pulse electric current sintering (PECS) was tried for Ir-25 at.% Nb (Ir{sub}3Nb), which has a high melting temperature of about 2435 ℃. Ingot powder was made by crashing an ingot, and the ingot powders were sintered at temperatures between 1700 and 1900℃ up to 2 h under 40 MPa. Pure-metal powder was mixed to achieve a composition of Ir-25 at.% Nb, and the pure-metal powders were sintered at a temperature between 1700 and 1900℃ for up to 1 h. The microstructure and phase structures of sintered samples were investigated by scanning electron microscopy (SEM) and x-ray diffractometry. The sintering mechanism and problems for Ir{sub}3Nb in PECS are discussed.
机译：对于Ir-25 at。％Nb（Ir {sub} 3Nb），尝试了脉冲电流烧结（PECS），其熔化温度约为2435℃。将铸锭粉碎，制成铸锭粉末，并在40 MPa下于1700至1900℃之间的温度下烧结铸锭粉末2小时。混合纯金属粉末以达到Ir-25 at。％Nb的组成，然后在1700到1900℃之间的温度下烧结纯金属粉末长达1小时。通过扫描电子显微镜（SEM）和X射线衍射仪研究了烧结样品的微观结构和相结构。讨论了PECS中Ir {sub} 3Nb的烧结机理和存在的问题。

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