长沙理工大学学报（自然科学版）2016，Vol.13Issue(1)：62-68,7.
多孔 Cu-Ni-Al 合金在熔融碳酸盐环境下的压缩蠕变行为
Compression creep behaviors of the porous Cu-Ni-Al sintered alloys in molten carbonate
摘要
Abstract
The compressive creep test is conducted on porous Cu-35Ni-10Al alloys in mol-ten Li2 CO 3 -38%K2 CO 3 environment,with the utilization of the RDL05 electronic creep-fatigue testing machine,at a test temperature of 650 ℃,with different porosities,and un-der different stress conditions,then the time-strain change curve of porous Cu-35Ni-10Al alloy is obtained.JSM6360 LV scanning electron microscope and energy spectrum analysis was used to observe the microstructure of the specimen before and after the creep test.The effect of molten salt environment,porosity size and load level on creep properties of materials are compre-hensively considered.The result shows that creep can be accelerated by molten salts,high load stress and large porosity.When the load stress is higher than 0.1 MPa,an evident increase of steady creep rate is obtained.At the initial stage,the molten salts corrosion is mainly concen-trated on the copper-rich phase.However,copper-poor phases are gradually corroded with the increase of load stresses.Annular corrosion products are observed surrounding the pha-ses but the original morphology of which does not change.Moreover,areas where the con-tents of Al are relative low are easily corroded by molten carbonate.The analysis shows that the molten salts condition,load stresses,size of the pores and the elements distribution are the joint factors to decide the deformation mechanism of Cu-35Ni-10Al alloys.关键词
熔融碳酸盐燃料电池/多孔 Cu-Ni-Al 合金/高温腐蚀/压缩蠕变/组织结构Key words
MCFC/porous Cu-Ni-Al sintered alloys/high temperature corrosion/com-pression creep/microstructure分类
矿业与冶金引用本文复制引用
何建军,郑泽华,李贤泽,陈荐,李微..多孔 Cu-Ni-Al 合金在熔融碳酸盐环境下的压缩蠕变行为[J].长沙理工大学学报（自然科学版）,2016,13(1):62-68,7.基金项目
国家自然科学基金资助项目(51075044) （51075044）
湖南省高校创新平台开放基金项目(13k052) （13k052）
