Breviary Technical Ceramics






7.2.3 Modular Design

Ceramic bodies that are either large or that have complex shapes often cannot be formed, or can only be formed with great difficulty, using the forming processes described above. A method that is often practised, and is worth considering, is that of splitting a complex part into two or more smaller and simpler units that can therefore be manufactured much more easily using the usual techniques. It is only necessary to ensure at the design stage that these smaller units can later be joined to form a whole. (Example on page 173)

The design of ceramic parts using modular techniques in many cases offers advantages with respect to the economic manufacturing processes, simplifying quality control, increasing load capability, reducing thermal stresses, and so on. For example, insulators that are 4 to 5 m tall, rated for 550 kV, are assembled from prefabricated parts that are either glued together or joined by glazing.

A number of different techniques have already been successfully applied to joining identical materials (ceramic-ceramic):

  • slip joining
    (assembly of parts in the green state)
  • lamination
    (layered structure)
  • co-sintering
    (axle and rotors in some brands of turbochargers, etc.)
  • gluing
  • soldering.

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