Moisture content analysis of metal powders, using oven desorption followed by Karl Fischer titration
Paper i proceeding, 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.

Ovens

Desorption

Titration

Flow of gases

Powder metallurgy

Powder metals

Inert gases

Moisture determination

Moisture

Författare

P. Mellin

Swerea

Tommy Zavalis

Swerea

Linnea Tingö

Siemens industrial turbomachinery

Håkan Brodin

Siemens industrial turbomachinery

Johan Wendel

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Sigurd Berg

Höganäs

Dmitri Riabov

Höganäs

A. Strondl

Swerea

Lars Nyborg

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Euro PM 2018 Congress and Exhibition

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

Ämneskategorier

Keramteknik

Metallurgi och metalliska material

Oceanografi, hydrologi, vattenresurser

Mer information

Senast uppdaterat

2020-09-15