By Michael Scheffler, Paolo Colombo
Mobile ceramics are a selected type of porous fabrics together with between others foams, honeycombs, hooked up fibers, robocast constructions and assembled hole spheres. as a result of their specific constitution, mobile ceramics exhibit a large choice of particular homes which cause them to vital for numerous engineering functions. a growing number of patents, medical literature and international meetings dedicated to mobile fabrics testifies to a quickly starting to be curiosity of the technical neighborhood during this subject. New functions for mobile ceramics are regularly bein. �Read more...
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Extra info for Cellular ceramics : structure, manufacturing, properties and applications
These involve the application of a load via a geometrically deﬁned indenter, such as a steel ball (as in the Rockwell technique), a diamond square pyramid (Vickers), or an elongated diamond pyramid (Knoop). 12 Hardness versus load relationship of a SiC-based ceramic, showing the strong dependence of the measured hardness of the applied load expressing the difficulties to determine a reliable hardness value . 12). Furthermore, there is no relationship for converting different hardness test values (such as Knoop to Vickers hardness), thus making the hardness comparison of different ceramic materials difﬁcult.
The sol–gel coating of glass has been used in industry since the early 1970s . Depending on the composition of the glass layer, it is possible to manufacture reﬂective or anti-reﬂective ﬁlms , passive, and doped coatings (for microelectronics). Furthermore, it is also possible to produce ﬁlms which, due to their low thermal expansion compared with the substrate, generate compression stress, thereby drastically increasing the mechanical strength of the glass . As reported by Schubert [56,57], metal ceramic nanocomposites can be created by metal–ligand complexation bonded to silicon in the glass structure.
In extensive studies, Niihara found that nanocomposites exhibited signiﬁcantly enhanced mechanical properties. 20 nm at 200 to 300 kV, thus making the discrimination of atoms which are located closer than this distance impossible. 1 nm can be achieved with high-voltage atomic resolution electron microscopy (HVAREM). Using this technique, it is possible to discriminate light atoms, for example Ga and N, in GaN thin ﬁlms . A combination of HREM techniques, using methods such as nano-electron diffraction, energy dispersive X-ray spectroscopy (EDX) and electron holography, makes it possible to clarify atomic rearrangement, composition and electronic state structure of the nano-regions in advanced ceramics .
Cellular ceramics : structure, manufacturing, properties and applications by Michael Scheffler, Paolo Colombo