gesintert

Gesintert is the German term used to describe a material that has undergone the sintering process. The verb sintern means to consolidate powder by heat below its melting point, and gesintert is the past participle form used to describe the resulting object or state. In German technical language, compounds such as gesintertes Metall, gesinterte Keramik or gesintertes Bauteil are common.

Sintering is a heat-treatment technique employed primarily in powder metallurgy and ceramic engineering. It involves heating compacted powder bodies, often referred to as green bodies, to a temperature where diffusion bonds particles together without melting the material. The process densifies the part, reduces porosity, and increases mechanical strength. Microstructural changes include grain growth and pore closure, which can lead to dimensional shrinkage during densification. Depending on the materials, sintering may be solid-state or involve a liquid phase, and it is often performed in controlled atmospheres to prevent oxidation or contamination.

Factors influencing the outcome include particle size and distribution, green density, sintering temperature and time, and the presence of a stabilizing or reducing atmosphere. Some applications aim for specific porosity or microstructure, such as filters, catalyst supports, bearings, or ceramic components. In modern manufacturing, sintering is also used in additive manufacturing processes, for example laser sintering, where powder beds are selectively heated to build parts layer by layer.

Overall, gesintert denotes the final state of a component produced by sintering, reflecting a solid, bonded structure achieved without complete melting of the constituent materials.