Question

What process is similar to powdered metallurgy in ceramic materials?

Answer 1

The alternative processes for powder mettalurgy are:

Isostatic Pressing

Hot Isostatic Pressing

Cold Isostatic pressing

Roll Compaction

Powder Extrusion

Loose sintering

Spark Sintering and

Hot pressing etc

Explanation for one:

Isostatic pressing is a powder processing technique characteristic in the use of fluid pressure in order to compact the part. Metal powders are placed in a flexible container. This sealed container is the mold for the part. Fluid pressure is exerted over the entire outside surface of the container, causing the container to press and form the powder into the correct geometry. Most processes exert forces on the powder through an axis. Isostatic pressing is special in its use of all around pressure.

The all around pressure exerted by the fluid during isostatic pressing manufacture, provides uniform compaction of the powder and uniform density within the compacted part. Density variation within the compact is a major concern of conventional processing, particularly with certain parts. Isostatic pressing is commonly used over conventional metallurgical techniques to produce parts that are larger, have high thickness to diameter ratios, or for superior material properties. Isostatic pressing tends to have long cycle times and is best utilized for short production runs. This manufacturing process consists of two main categories, cold isostatic pressing and hot isostatic pressing.