Programmable and rapid fabrication of complex-shape ceramics.

Area of Science:

• Materials Science
• Ceramics Engineering
• Advanced Manufacturing

Background:

• Ceramic shaping is critical but current methods struggle with speed and property preservation, particularly for piezoceramics.
• Existing techniques often lead to weakened material properties during complex shape formation.

Purpose of the Study:

• To develop an ultrafast ceramic shaping and sintering (USS) method.
• To enable rapid fabrication of complex 3D ceramic geometries without compromising material integrity.

Main Methods:

• Leveraging precise thermomechanical fields for simultaneous deformation and sintering of ceramic powder compacts.
• Utilizing a programmable carbon-felt Joule heater for controlled thermal activation and mechanical load application.
• Fabricating barium titanate (BT) piezoceramics in intricate shapes.

Main Results:

• Successfully demonstrated the USS method for creating complex shapes like twists, arches, and micropatterns in barium titanate piezoceramics.
• Achieved energy efficiency of approximately 1.06 kJ mm⁻³.
• Completed the shaping and sintering process in minutes, highlighting time efficiency.

Conclusions:

• The USS method provides an effective and versatile solution for shaping advanced ceramics into complex 3D geometries.
• This technique overcomes limitations of traditional methods, offering enhanced versatility for piezoceramics and other ceramic materials.