Microstructural Characterization and Mechanical Properties of Si3N4 Formed by Fused Deposition of Ceramics
Abstract:We present processing (green and sintered), part shrinkage and warping, microstructural characterization, and mechanical properties of Si3N4 made by fused deposition of ceramics (FDC), using optical microscopy, scanning electron microscopy, and X-ray diffraction. The mechanical properties (fracture strength, fracture toughness, and Weibull modulus) are also reported. Proper FDC build parameters resulted in dense, homogeneous, near-net-shape Si3N4, with microstructures and mechanical properties similar to conventionally processed material. Mechanical properties are shown to be isotropic, while there is some degree of microstructural texturing (preferred -Si3N4 grain orientation) in sintered components.
Document Type: Research Article
Affiliations: 1: Corning, Inc., Corning, New York 14831 2: Washington State University, Pullman, Washington 99164 3: Rutgers University, New Brunswick/Piscataway, NJ 08903 4: Honeywell, Morristown, New Jersey 07962 5: Whalen Management Group, Sparta, New Jersey
Publication date: March 1, 2008