| Autor: | J. C. Labbe, A. A. Khan |
|---|---|
| Rok vydání: | 1997 |
| Předmět: |
Materials science
Aluminium nitride Mechanical Engineering Composite number chemistry.chemical_element Ceramic matrix composite chemistry.chemical_compound Fracture toughness Flexural strength chemistry Mechanics of Materials Aluminium Molybdenum Phase (matter) General Materials Science Composite material |
| Zdroj: | Journal of Materials Science. 32:3829-3833 |
| ISSN: | 0022-2461 |
| DOI: | 10.1023/a:1018636025842 |
| Popis: | Aluminium nitride–molybdenum ceramic matrix composites are produced by hotpressing a mixture of two powders. Mechanical properties of a series of samples are measured in order to study the effect of molybdenum phase on the behaviour of composite. Three-point bend strength increases from a value of 270 MPa for pure aluminium nitride to 571 MPa for a composite containing 40% by volume of metallic phase. Fracture toughness measured by the single-edged precracked beam (SEPB) technique, is also increased as a function of molybdenum concentration. From 2.3 MPam1/2 for pure AlN we obtain a value of 6.9 MPam1/2 in the case of composite containing 40% by volume of metallic phase. This very important increase in the mechanical properties of AIN-Mo composites is attributed to higher mechanical properties of molybdenum and an adherent interface between AIN and Mo grains. |
| Databáze: | OpenAIRE |
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