Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 122-131 |
| Seitenumfang | 10 |
| Fachzeitschrift | Journal of microscopy |
| Jahrgang | 185 |
| Ausgabenummer | 2 |
| Publikationsstatus | Veröffentlicht - 1997 |
Abstract
In the composite system carbon fibre/magnesium alloy the interface reactivity was varied over a wide range by adding different amounts of the alloying element aluminium (alloys: AM20, AZ91) and by using carbon fibres of different surface properties (fibres: M40J, T300J). The structure and composition of interlayers in these composites down to the atomic scale as well as their effect on the mechanical properties were studied systematically by the combination of high-voltage electron microscopy, high-resolution electron microscopy, energy-dispersive X-ray spectroscopy and electron energy-loss spectroscopy with scanning electron microscope in situ bending tests. As resulting microstructure and nanochemistry correlate with the micromechanical fracture behaviour of the metal matrix composites, the interface reactivity can be used as a parameter governing the composite properties. In addition to precipitates of aluminium carbide, strongly influencing the fracture behaviour, there are also graphitic carbon ribbons and layers of nanocrystalline magnesium oxide at the fibre/matrix interface. Increasing the reactivity of the composite system, three characteristic modes of fracture behaviour are observed: single fibre pullout, bundle fracture (the optimum composite) and brittle failure.
ASJC Scopus Sachgebiete
- Medizin (insg.)
- Pathologie und Forensische Medizin
- Medizin (insg.)
- Histologie
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in: Journal of microscopy, Jahrgang 185, Nr. 2, 1997, S. 122-131.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Interface reactions and fracture behaviour of fibre-reinforced Mg/Al alloys
AU - Feldhoff, A.
AU - Pippel, E.
AU - Woltersdorf, J.
PY - 1997
Y1 - 1997
N2 - In the composite system carbon fibre/magnesium alloy the interface reactivity was varied over a wide range by adding different amounts of the alloying element aluminium (alloys: AM20, AZ91) and by using carbon fibres of different surface properties (fibres: M40J, T300J). The structure and composition of interlayers in these composites down to the atomic scale as well as their effect on the mechanical properties were studied systematically by the combination of high-voltage electron microscopy, high-resolution electron microscopy, energy-dispersive X-ray spectroscopy and electron energy-loss spectroscopy with scanning electron microscope in situ bending tests. As resulting microstructure and nanochemistry correlate with the micromechanical fracture behaviour of the metal matrix composites, the interface reactivity can be used as a parameter governing the composite properties. In addition to precipitates of aluminium carbide, strongly influencing the fracture behaviour, there are also graphitic carbon ribbons and layers of nanocrystalline magnesium oxide at the fibre/matrix interface. Increasing the reactivity of the composite system, three characteristic modes of fracture behaviour are observed: single fibre pullout, bundle fracture (the optimum composite) and brittle failure.
AB - In the composite system carbon fibre/magnesium alloy the interface reactivity was varied over a wide range by adding different amounts of the alloying element aluminium (alloys: AM20, AZ91) and by using carbon fibres of different surface properties (fibres: M40J, T300J). The structure and composition of interlayers in these composites down to the atomic scale as well as their effect on the mechanical properties were studied systematically by the combination of high-voltage electron microscopy, high-resolution electron microscopy, energy-dispersive X-ray spectroscopy and electron energy-loss spectroscopy with scanning electron microscope in situ bending tests. As resulting microstructure and nanochemistry correlate with the micromechanical fracture behaviour of the metal matrix composites, the interface reactivity can be used as a parameter governing the composite properties. In addition to precipitates of aluminium carbide, strongly influencing the fracture behaviour, there are also graphitic carbon ribbons and layers of nanocrystalline magnesium oxide at the fibre/matrix interface. Increasing the reactivity of the composite system, three characteristic modes of fracture behaviour are observed: single fibre pullout, bundle fracture (the optimum composite) and brittle failure.
KW - AlC
KW - carbide formation
KW - electron energy-loss spectroscopy
KW - energy-dispersive X-ray spectroscopy
KW - fibre-reinforced Mg/Al alloys
KW - in situ deformation
KW - interface structure
KW - MMC
KW - transmission electron microscopy
UR - http://www.scopus.com/inward/record.url?scp=0030894516&partnerID=8YFLogxK
U2 - 10.1046/j.1365-2818.1997.d01-611.x
DO - 10.1046/j.1365-2818.1997.d01-611.x
M3 - Article
AN - SCOPUS:0030894516
VL - 185
SP - 122
EP - 131
JO - Journal of microscopy
JF - Journal of microscopy
SN - 0022-2720
IS - 2
ER -