Composite Materials and Surface Technology






  • Anmelden

Research

Coordination of SFB 692 “High-strength aluminum based light weight materials for reliable components“

Composite Materials

  • Synthesis and characterization of organic ceramic-matrix precursors
  • Pyrolysis of carbon fiber reinforced polymers to produce ceramic matrix composites
  • Modification of natural fibers and polymer matrices
  • Process optimization to improve the properties of composite materials
  • Characterization of interface by means of microscopical, spectroscopical and micromechanical methods
  • Study of corrosion and degradation
  • Characterization of materials by means of thermogravimetric, caloric, mechanic and dynamic-mechanical methods
  • Simulation of composite material properties

Brazing and Soldering

  • Brazing of light weight metals
  • Active brazing of ceramics and ceramic-metal-joints
  • High-strength soldering joints for tool steels
  • Brazing of copper and copper composites
  • Development of lead free soldering
  • Brazing of cellular structures
  • Joining of composite materials
  • Simulation and modeling
  • Development and modification of solder alloys
  • Process development and optimization

Thermal Spraying

  • Optimization of the feedstock composition and design
  • Development of nanostructured powder feedstock by high energy ball milling
  • Application of cored wires for arc spraying, conventional and high velocity combustion wire spraying
  • Production of microstructured components
  • High rate synthesis of non-oxide ceramic coatings in thermal plasma jets
  • Development of process control tools
  • Optimization of coating properties and processing
  • Post treatment of thermally sprayed coatings
  • Non-destructive testing of thermally sprayed coatings

Electrochemical and chemical deposition technology

  • Pre-treatment
  • Electro-plating Cu, Cr, Fe, Ni, NiW
  • Electroless plating Cu and Ni
  • Dispersion coatings Ni/TiO2, Ni/Al2O3
  • Conversion coating Phosphating, Burnishing
  • Electrochemical conversion Anodizing

Corrosion tests

  • Corrosion tests in different environments and at different temperatures, e.g. Salt spray - DIN 50021, Moisture - DIN 50017, Sulfur dioxide - DIN EN ISO 6988
  • Corrosion test under climatic condition - variation of temperature and moisture
  • Investigation of inter-crystalline and trans-crystalline corrosion as well as stress corrosion cracking; immersion technique Electrochemical investigation, e.g. potentiostatic and potentiodynamic measurements
  • Consultancy for corrosion protection

Microstructure analysis

  • Materialographic preparation of materials
  • Optical microscopy
  • Micro-hardness test
  • Quantitative image analysis
  • Scanning electron microcopy (SEM)
  • Energy-dispersive X-ray spectroscopy (EDXS) attached to SEM and TEM
  • Transmission electron microscopy (TEM)
  • X-ray diffraction analysis (XRD)