High-Temperature Materials

© Fraunhofer IFAM Dresden
Assembly for high-temperature bending test at temperatures up to 1,500°C

Due to their very interesting and often unique properties intermetallics occupy a position between metallic materials and ceramics. Powder metallurgical processing routes are often preferred due to economical reasons but do also show advantages in terms of materials properties or processing (e.g. homogeneous microstructure; preparation of MMC´s or IMC´s). A special patented technique developed at Fraunhofer IFAM Dresden allows the preparation of elemental powder mixtures with high sinterability, the compaction of these powders by conventional techniques (as die pressing or cip) and finally the densification of samples and prototypes by reaction sintering.

Material Systems

  • Aluminides: Ti-Al, Ni-Al, Fe-Al
  • Silicides: Mo-Si, Ti-Si, W-Si
  • Other phases as Mg2Si and particle reinforced MMC-materials

Development Focus

  • Adjustment of materials properties for special applications by optimisation of microstructure, reinforcements, and materials composition

  • Optimisation of oxidation and corrosion behaviour

  • Development of protective layers

  • Development and adjustment of techniques for manufacturing of parts

  • Preparation of dense and highly porous intermetallic structures by reactive sintering

  • Preparation of functional intermetallic materials

  • Development of special powders; particle design by several techniques as coating and milling

  • Preparation and development of targets for sputtering

Applications (Examples)

  • Parts of MoSi2-X (e.g. nozzels, tiles) for application under extreme conditions (oxidation and corrosion) and temperatures up to 1,800 °C (e.g. atomisation of glas melt; waste incineration)

  • Finished and semi-finished parts of γ-TiAl manufactured by cost effective reactive sintering of modified elemental powder mixtures

Service Portfolio

  • Development and optimisation of intermetallic materials for special applications

  • Development of new technologies for preparation of parts from intermetallics

  • Development of intermetallic protective layers

  • Determination of materials properties (e.g mechanical properties up to 1,600 °C)

  • Development and modification of metallic, intermetallic and composite powders by several techniques; particle design

  • Transfer and up-scaling of results to industrial partner