Material Compounds Ceramic-Metals

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Portrait photo Bobzin © Copyright: Carl Brunn


Kirsten Bobzin

Head of Institute


+49 241 80 95327



This course provides an overview of the different material behaviors of ceramics and metals as well as the material profiles of important engineering ceramic materials. It furthermore serves to explain the most important processes of the production and joining of ceramics and the basics of brazing. After taking this class, students will be able to distinguish between different methods of ceramic brazing and to name particular features, fields of application and problems of the respective methods. Special attention will be paid to problems particular to joining mixed ceramic/metal joints and to the ways of solving these problems. Additionally, suitable methods of non-destructive and destructive testing will be presented. Moreover, the class will introduce the basics of using simulations to calculate internal stresses and their use in the technical design of joints to minimize residual stresses. A deeper insight into the ceramic production and brazing technology will be provided by guided tours through the institutes.

Summary of the contents of Material Compounds Ceramic-Metals



1. Material behaviour of metals and ceramics (IWM)

  • Atomic structure of the materials
  • Historical development

1.1 Production of components made of high
performance ceramics (IWM)

  • Manufacturing processes
  • Applications

1.2 Production of ceramics – practice (IWM)

  • Production by means of sintering and pressing

1.3 Material properties of high performance
ceramics: Al2O3, ZrO2, SiN, SiC (IWM)

  • Application areas
  • Manufacturing

2. Joining technology: form closure, friction
closure, metallurgical bonding (IOT)

  • Joining techniques
  • Practical examples

2.1 Fundamentals of brazing (IOT)

  • Mechanisms of brazing
  • Filler metals and atmospheres
  • Brazing process and construction design

2.2 Constructive design of ceramic-metal
composites (IWM)

  • Design/FEM-calculation
  • Quality inspection

2.3 Geometry optimization for brazing

  • Appropriate use of materials and constructions

3 Brazing of metallized ceramics and joining
utilizing glass filler metals (IOT)

  • Metallization processes
  • Characteristics of glass filler metals
  • Applications

3.1 Active brazing (IOT)

  • Mechanisms of active brazing
  • Applications

3.2 Practice: active brazing, RAB,
wetting tests (IOT)

  • Preparation of brazing pastes/specimens
  • Joining of samples

3.3 Brazing of rods, pipes and plates,

production of samples for tests (IOT)

  • Wetting tests by means of induction heating
  • Furnace brazing

4 Tests engineering (IWM)

  • 4- and 3-point bending test
  • Long-term behavior

4.1 Fracture mechanics and lifetime
calculation (IWM)

  • Tensile strength measurement
  • Survival probability

5 Reactive air brazing − RAB (IOT)

  • Mechanisms of RAB
  • Challenges in the application

5.1 Turbocharger − consideration of
different thermal expansion coefficients
in design (IOT)

  • Turbine wheel/shaft hub connection
  • Determination of the stress mode

5.2 Biomedical applications (IOT)

  • Biomaterials in medical technology