Nanoparticles

Mechanical Engineering Professor Xiaochun Li’s lab has developed an experimental technique that uses high-intensity ultrasonic waves to disperse nanoparticles (pictured) through molten metals. The waves cause the formation, growth and collapse of microbubbles within the material. The collapse of the microbubbles produces microscopic “hot spots” that can reach temperatures above 9,000 degrees Fahrenheit, causing micro-shock waves. Li and his team have shown that the violent micro-shock waves effectively disperse the nanoparticles evenly through the molten metals. Li is leading an interdisciplinary team working to implement nanotechnology in the traditional casting industry.