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Microstructural Characterization and Mechanical Properties of Si3N4 Formed by Fused Deposition of Ceramics

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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

DOI: http://dx.doi.org/10.1111/j.1744-7402.2008.02193.x

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

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