Title: Summary Part Composite Processing

Choose the correct statement.

- Fiber-reinforced polymers are processed into structural components using liquid polymers, prepregs, and bulk- and sheet-molding compounds. Fabrication techniques include various molding methods, filament winding, pultrusion and pulforming. (correct)
- Fiber-reinforced polymers are processed into structural components using liquid polymers, prepregs, and bulk- and sheet-molding compounds. Fabrication techniques include various forming methods such as thermoforming and injection modling, but also filament winding, pultrusion and pulforming.

- Prepregs are tapes of aligned reinforcing fibers pre-impregnated with resin. (correct)
- Prepregs are sheets of randomly oriented, choped fibers pre-impregnated with resin.

- Bulk and sheet molding compounds are mixtures of thermoplastic polymer or uncured thermosetting polymer, randomly oriented, chopped fibers, and additives. Bulk and sheet molding compounds come in the form of billets or sheets, respectively. (correct)
- Bulk and sheet molding compounds are mixtures of thermoplastic polymer or uncured thermosetting polymer, aligned or woven fibers, and additives. Bulk and sheet molding compounds come in the form of billets or sheets, respectively.

- In composite processing, the type and orentation of the fibers and the strength of the bond between fibers and matrix and between layers of materials are important considerations. (correct)
- In composite processing, the type and orentation of the fibers and their strength are the main parameters that influence the reliability of the produced part.

- Metal-matrix composites are processed by liquid-phase and solid-phase processes. Liquid phase processing involves casting of the liquid metal together with the solid reinforcement phase. Solid-phase processing utilizes powder metallurgy techniques. (correct)
- Metal-matrix composites are processed by liquid-phase and solid-phase processes. Liquid phase processing involves casting of the liquid metal together with the solid reinforcement. Solid-phase processing utilizes forging and extrusion techniques, where the reinforcement phase is mechanically pressed into the metal matrix.

- Ceramic-matrix composites can be processed by slurry infiltration, chemical synthesis and vapor-infiltration. Slurry infiltration includes reaction sintering (or bonding), where a metal infiltrates a carbon green part and reacts to the metal-carbide (the ceramic matrix) upon sintering. (correct)
- Ceramic-matrix composites can be processed by slurry infiltration, chemical synthesis and vapor-infiltration. Slurry infiltration includes reaction sintering (or bonding), where the slurry of ceramic powder is forced into the green part of reinforcing particles by pressure generated by a combustion reaction upon sintering.

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