REACTION SINTERING OF METAL-CERAMIC AISI-Al_2O_3 COMPOSITES MANUFACTURED BY BINDER JETTING ADDITIVE MANUFACTURING PROCESS

摘要

Metal-ceramic composites are attractive materials for various applications due to their high specific strength, wear resistance, thermal stability, and good high-temperature mechanical properties. Binder jetting additive manufacturing is a promising way of manufacturing metal-ceramic composite parts with complex geometry. In this work, Al_2O_3 - Si powder blend was used to produce metal-ceramic green-parts by binder jetting process. The green-parts were then subjected to reaction sintering and subsequent liquid metal infiltration with aluminum alloy at 1200 °C . The microstructure and phase composition of the obtained samples were studied using scanning electron microscopy and X-Ray diffraction analysis. Mechanical properties were evaluated using microhardness measurements and compressive tests.