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AIST TODAYNo.15 Winter 2005


Crack-Free Thick Film via Centrifugal Sintering


Centrifugal sintering is an advanced technology that is specifically designed to sinter structures under constrained conditions, such as films on substrates and layered ceramics. This technology consists of loading high centrifugal acceleration more than 100 km/s2 onto specimens and heating. Owing to the distinctive pressing measure, pressing without molds and anisotropic shrinkage during sintering are achieved. This process has been found to be a successful strategy for eliminating shrinkage mismatches in multi-layered ceramics, leading to a crack-free homogeneous microstructure. This distinctive feature of centrifugal sintering arises from anisotropic shrinkage that is caused by chief densification progress along the radius of rotation.

Photo
Suppression of cracks in thick film by centrifugal sintering. The number indicates centrifugal acceleration

Relational Information

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