Compressive behavior and domain-related shape memory effect in LaNbO4 ceramics
| Autor: | C.M. Wayman, Li Jian |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Materials science
Mechanical Engineering Mineralogy Shape-memory alloy Condensed Matter Physics Stress (mechanics) Mechanics of Materials visual_art Indentation Domain (ring theory) visual_art.visual_art_medium General Materials Science Ceramic Crystallite Compression (geology) Composite material Monoclinic crystal system |
| Zdroj: | Materials Letters. 26:1-7 |
| ISSN: | 0167-577X |
| Popis: | The yielding phenomenon of polycrystalline LaNbO 4 at room temperature under compression and the shape memory effect have been investigated, using an Instron 8530 material testing machine and a Nikon QM micro-hardness tester. The yielding phenomenon has been found, and explained in terms of the orientation state of grains with respect to the direction of the applied stresses. The shape memory effect behavior has been discovered instead of the rubber-like behavior in the monoclinic LaNbO 4 , which is related to the domain boundary motion and new domain formation in response to the applied stress. Based on the observation of domain formation in the vicinity of the indentation, the mechanism for the shape memory effect has been suggested. |
| Databáze: | OpenAIRE |
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