Moisture content analysis of metal powders, using oven desorption followed by Karl Fischer titration
Paper in proceedings, 2020

In this paper, we use Oven Desorption followed by Karl Fischer Titration (KF), to measure moisture content in a newly opened PBF-LB Hasteloy X powder (we found 28.8 ppm), an PBF-EB powder (13.7 ppm) and a HIP powder (6.7 ppm). This method heats a powder sample inside a hermetically closed vial, in an oven. At the same time an inert gas flow enters, flushes out the evaporated water and exits the vial, via a double hollow needle. The gas-water mixture that exits is directed to the Karl Fischer Titration, where the evaporated moisture is quantified. Included is also a comparison with thermogravimetric analysis (TGA) and a climate chamber moisturization experiment of a PBF-LB HX powder followed by KF analysis. After the moisturization and KF analysis, the same powder was characterized in terms of oxygen content.

Flow of gases

Moisture

Powder metallurgy

Inert gases

Powder metals

Desorption

Moisture determination

Titration

Ovens

Author

P. Mellin

Swerea

Tommy Zavalis

Swerea

Linnea Tingö

Siemens industrial turbomachinery

Håkan Brodin

Siemens industrial turbomachinery

Johan Wendel

Chalmers, Industrial and Materials Science, Materials and manufacture

Sigurd Berg

Höganäs

Dmitri Riabov

Höganäs

A. Strondl

Swerea

Lars Nyborg

Chalmers, Industrial and Materials Science, Materials and manufacture

Euro PM 2018 Congress and Exhibition

European Powder Metallurgy Congress and Exhibition, Euro PM 2018
Bilbao, Spain,

Subject Categories

Ceramics

Metallurgy and Metallic Materials

Oceanography, Hydrology, Water Resources

ISBN

9781899072507

More information

Latest update

1/8/2021 1