摘要
为了研究多孔结构的渗透特性和机械性能,采用粉末冶金模压烧结技术制备微孔尺寸约5μm不锈钢、高温合金和铜合金非等厚回转体多孔发汗结构,研究了其微孔分布均匀性、气体渗透性能和力学性能与孔隙率的关系,渗透率随孔隙率增大而增大,强度随孔隙率增大而降低,除铜合金外,延伸率随孔隙率增大而降低。金属粉末冶金多孔材料可用于热防护结构的发汗冷却。
In order to collect data and characteristics of porous material, powder metallurgy and sinter process ware selected to be tested and applied to a nickel-base super-alloy, a copper-base alloy and a stainless steel. Porous material samples with particle size of about 5 ~m were manufactured to investigate their integral and local permeability characteristics, porosity distribution and mechanical properties. It was shown that porous material＇s permeability and mechanical properties depend on material＇s porosity.
出处
《导弹与航天运载技术》
北大核心
2006年第4期58-61,共4页
Missiles and Space Vehicles
关键词
多孔材料
发汗冷却
粉末冶金
性能
Porous material
Transpiration cooling
Powder metallurgy
Characteristic
