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Deformation Processes-Particulate Processing - Coggle Diagram
Deformation Processes-Particulate Processing
Powder Metallurgy
Pressing
Green compact is created by compressing powders into a suitable shape.
Sintering
The particles are fused together into a hard, rigid mass by heating the green compacts.
Advantages :
Net shape or almost net shape manufacturing method
Very little material is wasted in the process
Porosity controlled procedure
Specialized manufacturing technique for specific metals and alloys
High dimensional precision and an easy-to-automate procedure for cost-effective production
Disadvantages :
Expensive expenses for tools and equipment
The cost of metallic powders is high
handling and storing them can be problematic
part geometry can be limited
variations in part density, particularly for complex geometries, can cause issues.
Particles
Shapes
Spherical
Rounded
Cyllindrical
Spongey
Acicular
Flakey
Cubic
Aggregated
Density Measures
True density
the material's density, or its actual volume
Bulk density
density of the loose particles upon pouring
Metallic Powders Production
Gas Atomization Method
Chemical Reduction
Electrolysis
Mechanical
Blending and Mixing of Powders
Blending
Particle sizes may vary, but the same chemistry of powders are mixed together.
Mixing
Different chemical powders are mixed together.
Compaction
Application of high pressure to the powders to form
them into the required shape
Equipment for processing powder-based materials, such as heat treatment, canning, sintering, blending, and consolidation.
Machines
Hot Isostatic Press
Cold Isostatic Press
Vacuum Hot Press
Hydraulic Press – Die Compaction
andling, Canning, Consolidation, and Sintering of Reactive Powders
Grinding, Comminution, Blending of Powders