Test Methods for Li Alloy Powders: Li-Al Alloy Content

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SUMMARY

The discussion focuses on testing methods for lithium-aluminum (Li-Al) alloy powders, which are sensitive to air and humidity. Spectroscopic analysis is suggested as a potential method, but the sensitivity of the alloys limits ordinary determination techniques. The use of Inductively Coupled Plasma (ICP) is questioned, while X-ray Diffraction (XRD) analysis is proposed as a viable option when the powder is dispersed in an inert glue to prevent oxidation. However, XRD may yield a composition error of 2-3% based on equipment quality and sample size.

PREREQUISITES
  • Understanding of Li-Al alloy properties and sensitivities
  • Familiarity with spectroscopic analysis techniques
  • Knowledge of Inductively Coupled Plasma (ICP) methods
  • Experience with X-ray Diffraction (XRD) analysis
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  • Research advanced spectroscopic techniques for sensitive materials
  • Study the application of ICP for alloy content determination
  • Explore methods to minimize error in XRD analysis
  • Investigate inert atmosphere handling techniques for alloy powders
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Materials scientists, metallurgists, and laboratory technicians involved in the analysis and testing of sensitive alloy powders.

Mertas
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I need the test methods for the Li alloy powders. What type of a test is needed to determine the content of the alloy? For instance Li-Al alloy? I couldn't find a suitable test for these powders (as known, these alloy powders are air and humidity sensitive, difficult to handle)
 
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Can you not get spectroscopic analysis done by a lab ?
 
Gokul43201 said:
Can you not get spectroscopic analysis done by a lab ?

These alloys, as known, are kept in inert(Ar) atmosphere. As contact with the humidity in the air or the air itself, it immidiately form oxide or hydroxides. So this limits me to carry out ordinary determination analysis. Would ICP work in this case? Or another think is that to convert the Li-Al alloy to its oxides, and then make wet analysis... I am not sure...
 
You can disperse the powder in an inert glue (such as those typically used for powder samples) and do XRD analysis to determine composition. The glue will prevent reaction with O2 or H2O. The only problem is that XRD does not have very high resolution for determining composition. You might have an error as big as 2 or 3% depending on the quality of XRD machine itself and sample size.
 

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