Manufacturing methods for the highest quality and consistency
Mott
porous metal fabrication begins with pregrading the metal
powders using precise sieve analyses (particle size distributions).
Powders are then compressed into desired shapes – a process
which reduces or eliminates the need for post-sintering shaping
and forming, while providing additional benefits:
- Precise thickness control of ±0.005" available in most shapes and grades
- More uniform porosity by reducing the number of “bridged” particles which create oversized pores
- Improved permeability and density control
- Higher strength by increasing the number of bonds between adjacent particles
Precompressed powders are then sintered in a positive-pressure controlled atmosphere furnace at temperatures approaching the melting point for the specific alloy being used. The controlled atmosphere heating process reduces surface oxide films from powder particles, and protects particle surfaces throughout the sintering process.
From start to finish of the manufacturing cycle, Mott technicians apply stringent control of processing variables such as compacting pressure, sintering time, temperature and atmosphere, resulting in precise control of density, permeability, and pore size. Each lot is checked for permeability uniformity, pore size uniformity, carbon content, corrosion resistance, and chemistry. The result is consistent, reproducible quality – available only with Mott porous metal media.
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