Material Design

At Fraunhofer Center HTL, the development of new materials is always focused on the planned application of the customer. The required component properties lead to a specific set of thermal, mechanical, electrical, and chemical properties that must be met during material design. The processing steps from raw material to finished product often set further constraints that must be considered in computer-aided material design. For material design, the requirements profile agreed upon with the customer is first systematically analyzed to identify the essential decision criteria for designing the material. Weaknesses and strengths of existing material solutions for the specific application are checked.

Once the conditions are clarified, some fundamental questions about material selection are addressed, such as:

  • Are there commercial materials that would be suitable with minor modifications?
  • Which material provides the optimal technical and economic solution?
  • Could the requirements possibly be best met by composite materials or composite structures? (publication: Ceramic Matrix Composites)
Material Selection

The HTL utilizes material databases and material indices (publication: Ceramics Facing Competition) as well as thermodynamic calculations (publication: Phase Formation) for material selection. For multiphase or porous materials, a special microstructure design is carried out (publication: 3D Modeling of Ceramic Composites). This involves using an in-house software for generating realistic microstructures and commercially available finite element programs for predicting macroscopic material properties. To ensure the precision of the results from these microstructure-property simulations, the simulation results are experimentally calibrated and validated. All necessary investigation methods for quantitative microstructure analysis and measurement of thermal, mechanical, and electrical material properties are available. The microstructures are optimized in the property simulations for the specific needs of the customer. Pores and melt phases are adequately taken into account. In the case of fiber-reinforced materials (CMC), realistic fiber distributions can be simulated. If necessary, the HTL develops suitable manufacturing processes for adjusting optimal microstructures and material properties. Process development for material design is efficiently carried out using in-situ measurement methods and computer simulations.

Service Offering:

  • Selection of suitable materials for customer-specific requirements
  • Testing of concepts for material composites
  • Analysis of material performance under complex thermomechanical stresses
  • Development of decision criteria for material selection
  • Measurement of critical material properties
  • Determination of optimal microstructures for customer-specific requirements
  • Cost-benefit analyses for different design variants
  • Selection of suitable phases for composites
  • Optimization of manufacturing processes for setting optimal microstructures
  • Creation of studies, execution of development projects
Gefügemodell AlN-Keramik

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