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Thermoplastics

Thermoplastics are polymers, which soften (becomes pliable and plastic) and melt when heated. In the melted conditions thermoplastics may be formed by various methods (injection…

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Elastomers

Elastomers are polymers possessing high elasticity – may be reversibly stretched at high degree. Elastomers consists of long lightly cross-linked molecules. Common elastomers are: Polyisoprene…

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Glass transition

Glass transition is the transition of an amorphous substance from its soft and pliable state to a hard and brittle (glassy) state. Glass transition vs….

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Polymer structure

Polymer is a substance (natural or synthetic), molecules of which consist of numerous small repeated chemical units (monomers) linked to each other in a regular…

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Polymer materials

There are three general groups of polymer materials: Elastomers Thermoplastics Thermosets Elastomers Elastomers are polymers possessing high elasticity – may be reversibly stretched at high…

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Tribological properties of alumina reinforced composites

Composite materials reinforced (filled) with ceramic particles/fibers (e.g., alumina) are extensively used in the applications in which tribological properties (wear rate, coefficient of friction) are…

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Self-lubricating ceramic composites

Strong ionic or covalent bonds between the atoms of ceramic materials determine their strength, hardness, high melting point, modulus of elasticity (rigidity), temperature and chemical…

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Fabrication of Ceramic Matrix Composites by Sol-gel process

Sol-gel Infiltration – description Sol-Gel process of a fabrication of Ceramic Matrix Composites involves preparation of the matrix from a liquid colloidal suspension of fine…

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Fabrication of Ceramic Matrix Composites by Slurry Infiltration

Slurry is a dispersion of ceramic particles in a liquid carrier, which may also contain additives such as binders and wetting agents. Slurry Infiltration method…

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Fabrication of Ceramic Matrix Composites by Direct Oxidation Process

Direct Metal Oxidation (DIMOX) – description Direct metal oxidation process (Dimox) of Ceramic Matrix Composites fabrication is a type of Reactive Melt Infiltration (RMI) technique,…

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