ELECTRO-IMPULSIVE NANOTECHNOLOGY FOR PREPARING AN ALUMINUM - REFRACTORY-METAL

摘要

This article examines the use of nanosecond electromagnetic pulses (NESPs) to alloy aluminum with refractory metals. The alloying is done by treating aluminum melts with halides of transition-group elements. The action of NESPs on the given system at power densities within the range 1000-1500 MW/m partially destroys clusters in the melt and increases its fluidity; the high-melting alloying elements have an inoculating effect, and the gaseous reaction products that are formed create the conditions necessary for efficient refining of the melt. High-power electro-impulsive loading results in the formation of compact globular intermetallide inclusions of the Al-Mo and Al-Ti systems. These inclusions, with a size of 3-8[tm, improve the physicomechanical characteristics of aluminum alloys. The use of aluminum - refractory metal master alloys and silumins prepared with the use of NESPs improves the quality of thin-walled castings of complex form.