Analytical method for inert gases in alloy powders
| Autor: | G.R. Smolik, J.E. Delmore |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
Argon
Materials science Ideal gas law Mechanical Engineering Analytical chemistry chemistry.chemical_element Condensed Matter Physics Mass spectrometry Vacuum fusion chemistry Volume (thermodynamics) Mechanics of Materials General Materials Science Helium mass spectrometer Quadrupole mass analyzer Helium |
| Zdroj: | Materials Science and Engineering: A. 124:15-19 |
| ISSN: | 0921-5093 |
| DOI: | 10.1016/0921-5093(90)90330-6 |
| Popis: | A vacuum fusion technique has been developed for quantifying the argon and helium contents of metal powders. Samples are melted in a high vacuum system of known volume and the released gas is passed through a fixed pinhole leak and quantitatively measured with a previously calibrated quadrupole mass spectrometer. The amounts of inert gases are then calculated from the ideal gas law. The detection limit for both argon and helium in samples of about 0.15 g is 0.05 at.ppm. Measurements for powders with concentrations between 0.5 and 10 at.ppm are repeatable within ±5%. The mass spectrometer is equipped with an electron multiplier, thus providing greater sensitivity and enabling analyses to be performed upon samples as small as 0.015 g. This economical analytical method is suitable for both research and process-quality control applications. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|