About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
Presentation Title |
Ultra-Fast CO2 Laser Sintering of Iron-Alumina Metal-Ceramic Materials |
Author(s) |
Siddhartha Sarkar, Shunyu Liu, Hai Xiao, Fei Peng |
On-Site Speaker (Planned) |
Siddhartha Sarkar |
Abstract Scope |
The iron-alumina metal-ceramic system has recently demanded interest in structural components and functional coatings. Laser sintering promises extremely fast heating and cooling rates and facilitates non-equilibrium microstructures. As such, this novel study reports using CO2-laser sintering in an inert environment to investigate the iron-alumina material system. Iron-alumina ceramic slurries in different volume ratios are prepared and cast onto a glass substrate up to a thickness of 300 μm. By optimizing the laser parameters, it was possible to simultaneously melt and sinter the iron and alumina, respectively. Material characterization techniques revealed microstructures that were well-mixed, uniform, and dense and that were characteristic of liquid-phase sintering. A nano-scale presence of intergranular hercynite most likely facilitated the wetting behavior between the iron and alumina. These results show a new path toward processing metal-ceramic hybrid materials with stable, dense, crack-free, and non-equilibrium microstructures. |