cermet


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cermet

[′sər‚met]
(materials)
Any of a group of composite materials made by mixing, pressing, and sintering metal with ceramic; examples are silicon-silicon carbide and chromium-alumina carbide. Also known as ceramal; ceramet; metal ceramic.

Cermet

A group of composite materials consisting of an intimate mixture of ceramic and metallic components. Cermets can be fabricated by mixing the finely divided components in the form of powders or fibers, compacting the components under pressure, and sintering the compact to produce physical properties not found solely in either of the components. Cermets can also be fabricated by internal oxidation of dilute solutions of a base metal and a more noble metal. When heated under oxidizing conditions, the oxygen diffuses into the alloy to form a base metal oxide in a matrix of the more noble metal. See Composite material, Corrosion, Powder metallurgy, Sintering

The combination of metallic and ceramic components can result in cermets characterized by increased strength and hardness, higher temperature resistance, improved wear resistance, and better resistance to corrosion, each characteristic depending on the variables involved in composition and processing. Friction parts as well as cutting and drilling tools have been successfully made from cermets for many years. Certain nuclear reactor fuel elements, such as dispersion-type elements, are also made as cermets. See Ceramics

References in periodicals archive ?
* monolithic cermet reaming head MT3 HAM FINAL Ltd., o17.814 mm, coated with the nanocomposite super-nitride (Ti0.4,Al0.6)N, CemeCon HYPERLOX, gripped in the carbide thermogrip HAM-FINAL The Fuchs Oil emulsion ECOCOOL 68 CF2 (10% concentration, 60 bars in pressure, flood intensity 50 l/min) and outer system of cooling with an emulsion reservoir of 1,200 litres for the machining were used.
The aim of the current study was to investigate the effect of oxidation on the abrasive wear behaviour of TiC-[Mo.sub.2]C-Ni cermets in Si[O.sub.2] medium with an emphasize on the initial metal powders content and the share of molybdenum.
Technology Chamfering Reaming operation Dimension [mm] 0.5 x 45[degrees] [??] 12H7 x 50 Material of the Sintered carbide Cermet cutting tool coated TiN Number of blades 1 6 [v.sub.c] [m/min] 100 Variables f [mm/rev.] 0.1 Table 3.
The events for said scenarios will comprise the following: Particularly, in the sector of construction and architectural materials, new compounds for new applications will appear; for instance, compound derived from the mixture of ceramics and metals, called cermets, with applications in structural materials, mainly connectors, it is also the case of shape memory materials, and with other uses in applications as thermal and acoustic insulators; similarly, the use of recycled-plastic materials substituting wood in some applications of construction, sealers and paints that do not retain heat will increase; in relation to ceramic materials, they will have broader acceptance since they are relatively easy to produce and recycle.
On the other hand, three new phases of titanium silicon ([Ti.sub.5][Si.sub.3]), titanium oxide ([Ti.sub.2]O), and CaTi[O.sub.3] were also developed in another sintered cermet (TAV/CS) comprised TAV and CS as shown in Figure 7.
Experimental study on durability and tribological properties of HVOF sprayed WC cermet coatings, Journal of Advanced Research in Mechanical Engineering 1(4): 203-209 [online], [cited 10 March 2013].
Pakeeza Haider said that instead of Silver filling a new kind of filling naming 'Cermet' is being used for refilling in dental department.
Thermal spraying encompasses a group of processes used to apply metallic, ceramic, cermet, and some polymeric coatings for a broad range of applications.