Chapter 15: Powder Metallurgy

These flashcards cover key concepts and terms related to powder metallurgy, including processes, characteristics, and advantages/disadvantages.

Powder Metallurgy

A manufacturing process where fine metallic powders are agglomerated to form stock or shaped parts, involving cold pressing and heating.

Cold Pressing

The initial process of shaping powder by pressing it at room temperature between steel dies.

Sintering

The process of heating pressed powder compacts to bond and achieve final cohesion at elevated temperatures.

Cermet

A composite material made from ceramic and metallic materials, often formed through powder metallurgy.

Flowability

The ability of powder particles to flow, which affects the density and machinability of the final product.

Compressibility

The ratio of the volume of initial powder to the volume of the compressed piece.

Particle Size Distribution

A measure that determines the flowability, machinability, density, and porosity of metal powders.

Isostatic Molding

A method of shaping powders where pressure is applied uniformly through a medium like oil or gas for complex shapes.

Oil Impregnation

A finishing operation where oil is retained in porous bearings through capillary action.

Spark Sintering

A sintering technique that utilizes localized and rapid sintering and compaction of metal powders.