ASTM C773 is essential for selecting whiteware materials for manufacturing various products such as dinnerware, sinks, toilets, and dental implants. It ensures quality control by determining the strength of whiteware, aiding in the selection process. The first procedure is suitable for testing whiteware products with low to moderately high strength levels, typically up to 150,000 psi or 1030 MPa. The second procedure, on the other hand, is specifically designed for testing high-strength ceramics, typically exceeding 100,000 psi or 690 MPa.
ASTM C773 Test Procedure
| Sample Checking | Samples are initially inspected for flaws, and any with visible cracks are discarded. Dye checking is then performed on the sample’s surface to identify any remaining flaws. |
| Immersion in an ultrasonic bath | The sample undergoes cleaning by immersion in a hot, detergent-filled ultrasonic bath. After removal, it is rinsed with hot water, dried, and cooled to room temperature in a desiccator. |
| Application of Load | Flawless, cleaned, and dried samples are positioned between the testing machine’s contact blocks. A continuous load is then applied to the sample until it fractures. |