Gas Purification for Additive Manufacturing

40_gas purification for additive manufacturing

Active Gas Purification ensures a consistent gas source purity. This can contribute to process repeatability.

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High Performance Sub-PPB Gas Purification for Metal 3D Printing

Effective oxygen removal can contribute to improved additive manufacturing part quality, consistency, and finish.

Defining the Problem

In current high-performance 3D Printing (Additive Manufacturing) applications, gas-borne contamination can lead to problems with:

  • mechanical properties out of specification
  • increased uptake of oxygen into the powder and the printed component - leading to associated risk of long-term fatigue failures
  • powder clogging

... and other issues with the printed product and the printing equipment.

Gases such as argon, nitrogen, and various mixtures that are used for 3D Printing are generally available in sufficiently high purity grades. However, undesirable contamination by oxygen can occur in the gas delivery system, traceable to leaking fittings, contaminated gas delivery equipment, and contamination occurring during cylinder and equipment changeovers.

Oxygen contamination is also present in most metal powders, and can be picked up by argon during the printing process. If the argon is recirculated in the printer -  without purification - oxygen impurities increasingly accumulate in the recirculating gas as the part(s) are being printed, which in turn can oxidize the metal being deposited. The longer the gas is recirculated, this could - at some point - lead to deposited material that is out-of-spec.

Introducing the Solution gas purifier for 3d printing

Gas purification using MATHESON 3DPro™ Nanochem® Purifiers restores the purity of your gases by removing these rogue impurities.

In a continuous-operation application such as 3D Printing, MATHESON 3DPro™ Nanochem® Purifiers feature high purification capacity (i.e., long lifetime), meaning that a purifier can be left on-line for long periods of time before replacement is required.

Typically, we will specify a purifier that will last at least 12 months for your system. Onboard endpoint detection with an optical sensor alerts the operator when the sorbent is approaching end-of-service.

How Purification Can Benefit 3D Printing

Reduction in soot and oxidation. Lower amounts of oxygen result in a less violent process and more consistent printed parts.

Process and Product Consistency. Active gas purification removes a variable - i.e., gas purity deviations - that can impact printer repeatability and the quality of the printed product.

Stabilized printing process. Eliminate variations due to gas line leaks, impurity fluctuations that occur from cylinder to cylinder or when a cylinder or bulk tank is replaced or refilled.

 

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View and download our brochure:
Nanochem® 3DPro™ Purifier System for Additive Manufacturing.

 


Read More about MATHESON Gases and Systems for Additive Manufacturing:


Additive Manufacturing Overview


Gas Supply Options


Gas Control Systems


Gas Purification


Argon Gas Recovery


Additive Manufacturing Safety


 

Have a Question?

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MATHESON's Gas Optimization Tools for AM include:

  • Supply of argon, nitrogen, other gases, and gas mixtures
  • Design and installation of gas storage and piping systems
  • 3DPro™ gas switchover supply panels for uninterrupted gas supply 
  • 3DPro™ source and point-of-use gas purifiers
  • 3DPro™ purge assemblies
  • Ultra-High-Purity gas sensors and analysis systems
  • Gas handling safety equipment and training programs

 

Gas Optimization for Additive Manufacturing