Researchers Develop New Process to Overcome Brittleness of Ceramics

Published Date : Sep 27, 2019

It would not be an exaggeration to say that in near future an electric field could manufacture fracture resistance drinking mugs or even wartime missiles.

Ceramics is used in the making of various items like missile heads, auto parts, thermal barrier coatings on engine blades, optic components, and drinking mugs. Ceramics come with immense strength, however they tend to get fractured all of a sudden, if put under some load.

In view of this vulnerability of ceramics, researchers at Purdue University have come up with a completely new method that could defeat the brittleness of ceramics. The newly invented method could also make them durable and ductile. Flash sintering, as the new process has been named, generates an electric field and adds it to the traditional process of sintering that is utilized to make bulk products from ceramics.

Normal Room Temperature can Change the Plasticity of Ceramics

Professor Haiyan Wang shares that the researchers have proved that even at normal room temperatures, electrical field sintered ceramics is capable of deforming plastically before fracture when put under high strain. Professor Wang is a professor of engineering, Purdue's College of Engineering.

The study exhibits that the like other metals shape of ceramics changes but at room temperature following an application of electric field the ceramics formation. Extensively utilized titanium dioxide has been used for the purpose of this research.

Professor Jin Li said that many metallic materials have been introduced to nanotwins for better ductility and strength. However, there exist few studies that exhibits that stacking faults and nanotwins are capable of substantially enhance ceramics’ plasticity. Professor Jin Li is a postdoctoral fellow at Purdue University and one of the researchers of this study.

Substantially enhanced room temperature can improve ductility of metals like titanium dioxide due to its exceptional high-density defects. The research has been published on Science Advances, which is a scientific journal established in 2015.