Microstructure of Nb BASED A12O3 Composites
| Autor: | D. E. Garcia, N. Claussen, Gerhard Dehm, Christina Scheu, Wayne D. Kaplan |
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| Rok vydání: | 1998 |
| Předmět: | |
| Zdroj: | Microscopy and Microanalysis. 4:588-589 |
| ISSN: | 1435-8115 1431-9276 |
| DOI: | 10.1017/s1431927600023060 |
| Popis: | Metal-ceramic composites possess a wide range of applications due to an increased fracture toughness and strength compared to monolithic materials. A better understanding of the correlation between properties and microstructure of these materials requires a detailed analysis of the phases which form during processing. This can be accomplished by using various transmission electron microscopy (TEM) methods. In this study Nb based AI2O3 composites were investigated. The composites were prepared by pressureless sintering 2 of compacts of attrition milled AI2O3 and prealloyed Nb(Al) powder mixtures. The addition of 7 wt.% of Al to the Nb powder is supposed to assist in rapid and complete sintering of the material. The microstructure was studied in detail by conventional TEM using selected area diffraction (SAD). The chemistry and structure of the occurring phases, second phase particles and grain boundaries were analysed by analytical TEM and high resolution TEM (HRTEM). |
| Databáze: | OpenAIRE |
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