摘要
Fe_(3)Al多孔滤芯特别适用于高温、高压及腐蚀环境下的精密过滤与气固分离等,为了使滤芯满足使用要求,除了考虑它的孔隙特性之外,其力学性能也至关重要。实验采用粉末冶金工艺制备了Fe_(3)Al金属间化合物多孔材料,采用XRD、SEM及孔结构与力学性能检测等测试手段研究了环境温度对Fe_(3)Al金属间化合物多孔材料的孔隙特性、力学性能与组织形貌的影响,为其在高温条件下使用提供可靠性依据。实验结果表明,Fe_(3)Al基金属间化合物多孔材料的抗拉强度在300℃时达到最大,之后随着温度的升高而下降,温度高于700℃后下降明显,断裂属于脆性断裂。随着温度的升高,Fe3Al金属间化合物多孔材料的有序度发生变化。
Fe_(3)Al porous metal filter element is especially suitable for precision filtration and gas-solid separation under high-temperature high-pressure and corrosive environment.In order to meet the usage requirements of the filter element,in addition to considering its pore characteristics,its mechanical properties are also crucial.Fe_(3)Al intermetallic compounds porous materials were prepared by powder metallurgy technology in this paper.The effects of ambient temperature on the pore characteristics,,mechanical properties and microstructure of the porous materials were studied by XRD,SEM,pore structure and mechanical properties.It shall provide a reliable basis for the use of Fe_(3)Al porous materials at high temperature.The experimental results show that Fe_(3)Al porous materials have good tensile strength and permeability properties at medium and high temperature.The tensile strength reaches the maximum at 300℃ and then decreases with the increase of temperature,and decreases obviously when the temperature is higher than 700℃.The fracture belongs to brittle fracture.The order degree of the Fe_(3)Al intermetallic compounds porous materials changes with the increase of temperature.
作者
杨军军
张玉
刘冠颖
郭辉进
平韶波
吉力强
YANG Junjun;ZHANG Yu;LIU Guanying;GUO Hujin;PING Shaobo;JI Liqiang(AT&M Environmental engineering technology Co.,LTD,Beijing 100081,China;Central Iron and Steel Research Institute Co.,Ltd.,Beijing 100081,China;University of Science and Technology Beijing 100083,China)
出处
《粉末冶金工业》
CAS
北大核心
2024年第3期85-90,共6页
Powder Metallurgy Industry
