About this Abstract |
Meeting |
MS&T24: Materials Science & Technology
|
Symposium
|
Manufacturing and Processing of Advanced Ceramic Materials
|
Presentation Title |
Measurement of Glaze Thermal Expansion via Crazing |
Author(s) |
Michael Thomas Carson, William Carty, Hyojin Lee, Grace Dunham |
On-Site Speaker (Planned) |
Michael Thomas Carson |
Abstract Scope |
The measurement of glazes used as durable coatings on both traditional and advanced ceramics is a time-consuming and difficult process. It is necessary for the glaze to have a lower coefficient of thermal expansion (CTE) than the underlying body to ensure that the glaze is in compression. If the CTEG>CTEB, then the glaze crazes and the spacing of the cracks in the glaze layer are indicative of the CTE mismatch. By creating a body with an extremely low but known CTE, it is possible to have all glazes craze and the CTE of the glaze can be calculated. This technique is straightforward and automatically incorporates the body-glaze interaction-induced glaze chemistry shift (which always lowers the CTE of the glaze). In addition, the role of glaze thickness can be directly measured, as increasing glaze thickness results in a reduction in the chemistry shift. |