Production Process and Properties of a Highly Porous Al Alloy Made Using NaCl Droplets as a Space Holder

作     者：Manuela Covaciu Andrew Richard Kennedy 

作者机构：Faculty of Engineering University of Nottingham Faculty of Material Science and Engineering Universitatea Tehnica din Cluj-Napoca School of Engineering Pontificia Universidad Católica de Chile 

出 版 物：《Acta Metallurgica Sinica(English Letters)》 (金属学报（英文版）)

年 卷 期：2015年第28卷第8期

页      面：1034-1040页

核心收录：

学科分类：07[理学] 070205[理学-凝聚态物理] 08[工学] 0817[工学-化学工程与技术] 0806[工学-冶金工程] 0807[工学-动力工程及工程热物理] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0802[工学-机械工程] 0703[理学-化学] 0811[工学-控制科学与工程] 0702[理学-物理学] 

基　　金：Romanian National Centre for Studies in Scholarships Abroad (H.G. nr. 697/1996) for financial support 

主　　题：Aluminium alloy Sodium chloride Porous metal 

摘      要：Porous Al structures have been made using a porogen leaching method but with additional novel steps. In this way, Al-0.25Cu-0.6Si-1.0Mg alloys with interconnected, open cells have been made, with high levels of porosity（up to 89%）. The use of 4 to 5 mm diameter sodium chloride droplets combined with interspersion of the metal powder and droplets in the die and dissolution of the salt before sintering was found to enable easier interspersion of the two components, resulting in good connectivity of the beads via the formation of ‘‘windows＇ ＇ between the pores, and rapid elimination of salt from the structure. Porous Al with densities in the range of 0.28–0.86 g/cm3 exhibited compressive yield strengths in the range of 0.14 to 7.5 MPa, with no difference being observed between the samples made by this route and by more conventional dissolution of the salt after sintering. These novel steps widen the possibility for porous metal manufacture to other materials, not limited by the need to have a sintering temperature below that for the melting point of salt.