Conductive Additive Electric Current Sintering

摘要

The present disclosure is directed to an electric current sinterable material containing a minority portion being significantly more electrically conductive than the primary material being sintered. This includes forming an inorganic body or sintered coating as well as an apparatus for and method of making use of such a variable composition powder. An electrical current is used to cause a combined energy and temperature profile sufficient for powder-powder sintering. This preferred method for powder-substrate bonding is referred to as flame-assisted flash sintering (FAFS).

主权项

1. A method of electric current-induced sintering of materials with varying degrees of electrical conductivity, the method comprising:
a) providing a first electrically conductive surface or fluid acting as a first electrode, b) providing a powder having a plurality of particles of which there is a larger amount of more electrically insulating material and a smaller amount of more electrically conductive material, c) attaching a green body to said powder or disposing said powder on said first surface to form a powder layer on said first electrode, d) providing an opposing electrically conductive surface or fluid opposing the first conductive surface, acting as a second electrode, and e) creating an electric circuit that connects the electrodes so that a current passes through the material between the electrodes, causing said materials to sinter.