Chemnitz UT: Mechanical Engineering: Institute of Materials Science and Engineering: Surface Technology and Functional Materials Group: Research Profile
Professorship of Surface Technology and Functional Materials
Research Profile
Problems in materials engineering or materials testing play an important role in research, production and quality control. From it, the working tasks for the chair derive. They range from fundamental research and the development and testing of materials to the usage and production of materials as well as the damage analysis of finished goods. The main focus in teaching and research is on:
- Composite Materials (MMC, CMC, PMC)
- Electro- and Electroless Plating
- Thermal Spraying (VPS, HVOF, FS, LS)
- Wear and Corrosion Tests, Measuring, Protection
- Bonding Technology (Brazing and Soldering, Vacuum Brazing, Active Brazing, Light Metals, Ceramics, Diamonds, Composite Materials)
- Simulation and Calculation (FEM, Process Optimisation)
- Characterisation of Materials (REM, TEM, LM, Thermal Analysis)
- Damage Analysis
Composite Materials
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Entwicklung und Konfektionierung von Verbundwerkstoffen auf der Basis von Polymer-, Keramik- und Metall-Matrices (PMC, CMC, MMC):
- Autoklav-Technologie
- Pyrolyse von PMCs
- Infiltration von Preformen (Silizieren, Aluminieren)
- Hochenergiekugelmahlen (HEM)
- Werkstoffdesign von Hybridverbunden
- Modellierung und Simulation von Verbundwerkstoffeigenschaften
- Entwicklung physikalisch-chemischer Beschichtungsverfahren, insbesondere für Fasern und Partikel (PECVD, PVD, Inkjet-Print, Reaktivschichten)
- Sensor- und Aktorentwicklung auf Faserbasis
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Charakterisierung
- Dynamisch-mechanisch-thermische Analyse (DMTA)
- Faserzugprüfung, Mikrobiege- und Mikrozugprüfung, jeweils in Kombination mit Grauwertkorrelation
- Interfacecharakterisierung
Electro- and Electroless Plating
- Development of pre-treatment strategies
- Electrolytic deposition of Cu, Cr, Fe, Ni, NiW
- Chemical-reductive deposition of Cu and Ni
- Deposition of dispersion layers, e.g. with TiO2, Al2O3, SiC, diamond
- Conversion layers: phosphating, oxalic acid treatment, burnishing
- Electrolytic conversion: anodising
Thermal Spraying
- Optimisation of wettable powder for alloying
- Development of nano-structured wettable powder by high-energy grinding
- Use of flux-cored wire for arc and high-speed wire flame spraying
- Manufacturing of microstructural components
- High-rate synthesis of non-oxide ceramic layers in thermal plasma jets
- Development of process monitoring tools
- Optimisation of layer properties and process management
- Subsequent treatment of sprayed layers
- Non-destructive layer examination
Wear and Corrosion Tests
Wear Tests
- Wear testing (laboratory tests, model tests)
- Evaluation of wear behaviour (characteristic quantities, wear mechanisms)
- Consultation for designs of tribosystems
- Test system for the simulation of wear mechanisms
- Fatigue and sliding abrasion wear test
- Abrasion test
- Adhesion test
- Test systems with integral simulation of wear
- Oscillating wear test
- Sliding rolling wear test
- Sliding wear test
Corrosion Tests
- Tests in different ambient conditions and at different temperatures, e.g.:
Salt spray fog - DIN 50021,
Humidity - DIN 50017,
Sulphur dioxide - DIN EN ISO 6988- Environmental tests with varying humidity, temperature and UV-ray intensity
- Examination of intercrystalline and transcrystalline corrosion as well as stress corrosion cracking, e.g. by boiling and dipping tests
- Electro-chemical examinations, e.g. current density potential measurements
- Assessment of corrosion stability (characteristic quantities, modes)
- Consulting for corrosion protection
Bonding Technologies
- Soldering of light metals
- Brazing of ceramics and CMCs
- Brazing of high-strength joints with tool steels
- Brazing of copper and copper composites
- Developments for usage of lead-free soft solders
- Soldering of cellular structures
- Joining of composite materials
- Simulation and calculation
- Development and modification of filler or brazing metal
- Process development and optimization
Simulation and Calculation
- FEM
- Process optimization
- Calculation of material properties
Characterisation of Materials
- Preparation of metallographic section
- Light-optical microscopy
- Microhardness test
- Microbending test
- Quantitative structural analysis
- Surface profilometry (strip light projection)
- Scanning electron microscopy (SEM)
- Atomic force microscopy (AFM)
- Energy-dispersive microarea X-ray analysis (EDXS) with SEM and TEM
- Transmission electron microscopy (TEM)
- Microstructure X-ray analysis (XRD)
- Glow discharge spectroscopy
