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Über dieses Buch

Very light, very strong. extremely reliable -aircraft and aerospace engineers are. and have to be. very demanding partners in the materials community. The results of their research and development work is not only crucial for one special area of applications. but can also lead the way to new solutions in many other areas of advanced technology. Springer-Verlag and the undersigned editor are pleased to present in this volume. an overview of the many facets of materials science and technology which have been the objective of intensive and systematic research work during past decades in the laboratories of the German Aerospace Research Establishment. Its contents shows clearly the interrelations between goals defined by the user. fundamentals provided by the scientists and viable solutions developed by the practical engineer. The particular personal touch which has been given to this volume by its authors in dedicating it as a farewell present to Professor Wolfgang Bunk. inspiring sci­ entist and director of the DLR Intitute of Materials Research for more than 20 years. has obviously given an added value to this important publication. Surely. this truly cooperative endeavour will render a valuable service to a large interna­ tional community of interested readers. many of them having personal links to the Institute. its director and its staff.



1. Aerospace Materials, Situation and Perspectives

Since aluminium was first used about 1900 as a structural material for the Zeppelin, this light metal was further developed into a long list of alloys and properties tailored to fit the needs of aeroplane builders around the world. It seems to have come to a market saturation because of the advent of carbon fibre reinforced polymer matrix composites. Titanium and nickel base super alloys dominate compressor and turbine materials for jet engines. Intermetallics and ceramics may replace some alloys in the future. From nature engineers have learned to strengthen a component by particle or fibre reinforcement.
W. J. G. Bunk

2. Metallic Materials and Metal Matrix Composites

From the beginning of aviation people have searched for lighter and stronger aircraft materials. The first generation of aircraft was mainly built of wood and fabric. But soon aluminium became an important structural material, especially after A. Wilm had discovered the age hardening capability of Al-Cu alloys in 1906. Nowadays high strength aluminium alloys are still the most important structural materials for aircraft and aerospace vehicles.
K. Welpmann, M. Peters, R. Braun, G. Staniek, F. Lehnert, H. Buhl, J. Kumpfert, C. H. Ward, K. Fritscher, H.-J. Rätzer-Scheibe, U. Schulz, K. Schulte, K.-H Trautmann, H. Döker, H. J. Dudek, R. Leucht

3. Ceramic Materials and Ceramic Matrix Composites

Silicon nitride is one of the best candidates among non-oxide ceramics and has a very attractive combination of properties. Such as
  • high strength at room and elevated temperatures
  • high impact strength
  • high strength-to-weight ratio
  • high specific modulus (E/ρ)
  • good creep resistance
  • excellent thermal shock resistance resulting from the low coefficient of thermal expansion
  • good thermal stability (decomposition temperature 1900°C
  • good chemical stability
  • low coefficient of friction
  • non-wettability by metals
  • high dielectric strength and
  • high hardness
B. Saruhan, J. Göring, H. Schneider, R. Pleger, W. Braue

4. Polymer Matrix Composites

Polymer matrix composites (PMCs) are in comparison with metal and ceramic matrix composites the most widely used composites. This is caused by their good properties and relative easy processing. Depending upon the type of fibre used, the costs are low (glass fibre reinforced plastics, GFRPs) to moderate (carbon fibre reinforced plastics, CFRPs).
P. W. M. Peters, K. Schulte

5. Materials Characterization and Life Prediction

A short review of microscopic, diffractometric and spectroscopic methods and their application in investigating the microstructure of materials is presented, and the physical background, the kind of informations obtainable on materials and the limitations of the microstructural and microanalytic methods are discussed.
H. J. Dudek, H. Nowack, H. Döker, G. Marci, R. Braun, H. Buhl, K.-H. Trautmann, M. Spiegelberg, J. Eschweiler


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