8 Joining and
Bonding and joining techniques play a decisive
role in the integration of ceramic components into a technical
system. It is necessary to integrate a ceramic part into a
complete system reliably and in such a way that those special
properties, the reasons for which the component was manufactured
out of ceramic, are exploited under all operating conditions.
The system as a whole must be tested again
under working conditions, paying special attention to the
compatibility of the ceramic part to its environment. Usually
the difficulties in assimilation result from differences between
the thermal expansion coefficients or elastic behaviour (modulus
of elasticity) of the ceramic and the surrounding components,
most of which are metal. Generally speaking, a large number
of joining techniques are available.
Basically, a ceramic can be temporarily or permanently bonded
with another ceramic or with any other material. To achieve
a reliable connection between ceramic components or with other
materials, techniques using material bonding, interlocking
and friction may be considered.