Effect of pores on the cleavage of twinned boron carbide crystals
| Autor: | T. V. Ostapchuk, G. S. Oleinik |
|---|---|
| Rok vydání: | 1996 |
| Předmět: |
Materials science
Metals and Alloys chemistry.chemical_element Cleavage (crystal) Boron carbide Condensed Matter Physics Carbide Crystallography chemistry.chemical_compound chemistry Mechanics of Materials Metallic materials Materials Chemistry Ceramics and Composites Substructure Crystallite Boron Crystal twinning |
| Zdroj: | Powder Metallurgy and Metal Ceramics. 34:500-504 |
| ISSN: | 1573-9066 1068-1302 |
| DOI: | 10.1007/bf00559956 |
| Popis: | The substructure and cleavage fracture in two types of polycrystalline B4C specimens are investigated. It is shown that in specimens hot-pressed below 2000°C twins in poreless grains are effective barriers for cleavage cracks. Cleavage fracture occurs in planes of the type {10\(\bar 1\)1}. There are twins and faceted pores in grains of specimens sintered below 2200°C. In these grains cleavage is along the twinning planes. Pores eliminate the effect of twins as crack stoppers. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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