摘要
研究了Pt-5Ir和ZGSPt-5Ir高温材料在1423～1523K温度范围内的蠕变行为。结果表明:由于氧化锆颗粒的添加,弥散强化PtIr5材料的高温蠕变性能比Pt-5Ir的性能优异。弥散强化PtIr5的蠕变机制为晶格自扩散引起的高温攀移控制,断裂方式为沿晶脆性断裂;Pt-5Ir的蠕变机制为牛顿粘滞滑移控制,断裂方式为穿晶韧性断裂。
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.
出处
《稀有金属材料与工程》
SCIE
EI
CAS
CSCD
北大核心
2012年第2期241-245,共5页
Rare Metal Materials and Engineering
基金
云南省基金项目(2007E125M)
国家重点基础研究发展计划项目(2008CB617609)
关键词
金属材料
Pt-Ir合金
弥散强化
蠕变
稳态蠕变速率
断裂
metal material
Pt-Ir alloy
dispersion strengthened
creep
the steady state ereep rate
fracture
