The Sintering Mechanism of Aluminium and the Anodization of Aluminium Sintered Bodies

Abstract

It has been said that aluminium is hard to sinter. This is because a hard aluminium oxide film forms naturally on exposed aluminium in air, and in the case of heat-treatment for sintering, another type of hard aluminium oxide file also forms. Thus aluminium is hard to sinter at about 600 C. The author has succeeded in manufacturing aluminium sintered bodies, by using a vacuum, an inactive gas or a reducible gas atmosphere for the sintering environment. The possibility of producing a satisfactory dielectric on the aluminium sintered body was also investigated. An aluminium sintered body has physical properties different from aluminium foil or plate, because it is always in the porous state. In this paper, the author presents the experimental results on aluminium sintered bodies manufactured under various conditions and the results of anodization of the sintered bodies. © 1979, Gordon and Breach Science Publishers, Inc.