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    Abstract:

    The creep behavior of Pt-5Ir and ZGSPt-5Ir high-temperature materials in the temperature range of 1423-1523 K were investigated. The results show that the creep property of ZGSPt-5Ir is better than that of Pt-5Ir because of ZrO2 addition. The creep characteristic of ZGSPt-5Ir is consistent with a structure-controlled creep process where some form of dislocation climb caused by lattice self-diffusion controls the creep deformation. And the fracture mode is brittle intergranular fracture. The creep characteristic of Pt-5Ir is consistent with mobility-controlled deformation where viscous glide of dislocations controls the creep. And the fracture mode of that is transgranular ductile fracture.

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[Kang Feifei, Zhang Kunhua, Guan Weiming, Chen Song, Zhang Jiming. Effect of Dispersion-Strengthened Phase on High Temperature Creep Property of PtIr5 Alloy[J]. Rare Metal Materials and Engineering,2012,41(2):241~245.]
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  • Received:February 16,2011