New fabrication methods for topologically complex monolithic ceramic components with accurate dimensions are being investigated. A common problem in the fabrication of precision ceramic components is controlling the forming process to attain uniform density in the green body; otherwise the tolerances achieved with green ceramics do not carry over to acceptable tolerances on the finished ceramic due to distortion and warping that occur during sintering. One of the fabrication methods under study is the fugitive phase approach in which a sacrificial material is used to form the desired channels and cavities. This paper is a continuation of previously presented work and examines the lamination step of the fugitive phase approach. In the lamination step, the green, pre-sintered, ceramic parts are layered with the sacrificial material parts and pressed together to remove air voids. During pressing uneven pressure distributions can be created in the green ceramic and the fugitive phase parts are slightly displaced or rotated. A computational model of the lamination process is used to examine how the material plasticity of the green ceramic, computational boundary conditions, and pressing duration affect the resulting geometry produced at the end of the lamination step prior to sintering. The resting stress, plastic strain, and deformed shapes are examined and compared. This information is used to complement experimental investigations of the fugitive phase approach.
Skip Nav Destination
ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
August 12–15, 2012
Chicago, Illinois, USA
Conference Sponsors:
- Design Engineering Division
- Computers and Information in Engineering Division
ISBN:
978-0-7918-4501-1
PROCEEDINGS PAPER
Modeling Tape Cast Ceramics With Layers of Fugitive Phases
Stephanie A. Wimmer,
Stephanie A. Wimmer
Naval Research Laboratory, Washington, DC
Search for other works by this author on:
Ming-Jen Pan,
Ming-Jen Pan
Naval Research Laboratory, Washington, DC
Search for other works by this author on:
Virginia G. DeGiorgi,
Virginia G. DeGiorgi
Naval Research Laboratory, Washington, DC
Search for other works by this author on:
Edward P. Gorzkowski
Edward P. Gorzkowski
Naval Research Laboratory, Washington, DC
Search for other works by this author on:
Stephanie A. Wimmer
Naval Research Laboratory, Washington, DC
Ming-Jen Pan
Naval Research Laboratory, Washington, DC
Virginia G. DeGiorgi
Naval Research Laboratory, Washington, DC
Edward P. Gorzkowski
Naval Research Laboratory, Washington, DC
Paper No:
DETC2012-70312, pp. 67-73; 7 pages
Published Online:
September 9, 2013
Citation
Wimmer, SA, Pan, M, DeGiorgi, VG, & Gorzkowski, EP. "Modeling Tape Cast Ceramics With Layers of Fugitive Phases." Proceedings of the ASME 2012 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. Volume 2: 32nd Computers and Information in Engineering Conference, Parts A and B. Chicago, Illinois, USA. August 12–15, 2012. pp. 67-73. ASME. https://doi.org/10.1115/DETC2012-70312
Download citation file:
10
Views
Related Proceedings Papers
Related Articles
Near-Net-Shape Forming of Ceramic Powder Under Cold Combination Pressing and Pressureless Sintering
J. Eng. Mater. Technol (April,2001)
Analysis of Brazing Stresses in Ceramic-Metal Joints in High-Vacuum Devices
J. Electron. Packag (March,1989)
Densification of Porous Stainless-Steel SLS Components During Cold Isostatic Pressing
J. Eng. Mater. Technol (January,2010)
Related Chapters
Part III Some Practical Advice
The Elements of Mechanical Design
Estimating Resilient Modulus Using Neural Network Models
Intelligent Engineering Systems Through Artificial Neural Networks, Volume 17
Introduction and Definitions
Handbook on Stiffness & Damping in Mechanical Design