Method of Producing a Metal Foam by Oscillations

摘要

This disclosure relates to a method of producing a bubbled metal foam, wherein adjusting the size of the bubbles takes place simultaneously with forming the bubbles by the use of oscillations induced by longitudinal waves within a formation region of the bubbles. In this way, a decrease in bubble size which can be caused in an uncontrolled or chaotic manner after the bubbles are created can be avoided. The oscillations are produced along a free surface of a metal melt to provide surface foaming.

主权项

1. A method for producing a block of metal foam having monomodal pore sizes, the method comprising:
arranging a melt of a foamable material within a container so as to provide a free surface of the melt; bringing a bubble forming end of a device into mechanical interaction with the melt in an interaction region of the melt, the interaction region being located on the free surface of the melt, and creating bubbles at the bubble forming end to be released at the interaction region; introducing longitudinal waves into the interaction region to induce oscillations within the interaction region when the bubbles are being created; and controlling the size of each of the bubbles to a controlled monomodal size value simultaneous to formation of the bubbles by using the oscillations induced by the longitudinal waves within the interaction region, thereby forming a metal foam with monomodal bubbles.