Surface oxide state on metal powder and its changes during additive manufacturing: An overview
Paper i proceeding, 2018

Quality and usefulness of the powder for additive manufacturing (AM) are strongly determined by the surface composition of the powder. In addition, taking into account harsh conditions during AM process, significant changes in the powder surface chemical composition are taking place, limiting powder recyclability. Hence, knowledge concerning amount of oxides, their composition and spatial distribution on the powder surface determines further powder recycling. This communication summarizes possibilities of qualitative and quantitative analysis of powder surface chemistry by surface-sensitive chemical analyses using XPS and HR SEM coupled with EDX. The effect of alloy composition, AM process applied and powder handling on the surface composition of the powder are addressed. Results indicate significant enrichment in the thermodynamically stable surface oxides in case of high-alloyed powder for both, EBM and LS processes. A generic model for the oxide distribution, depending on the alloy composition and powder surface degradation during AM manufacturing, is proposed.

Författare

Eduard Hryha

Chalmers, Industri- och materialvetenskap

Ruslan Shvab

Yt- och mikrostrukturteknik

Hans Gruber

Yt- och mikrostrukturteknik

Alexander Leicht

Chalmers, Industri- och materialvetenskap, Material och tillverkning

Lars Nyborg

Produktion

Proceedings Euro PM 2017: International Powder Metallurgy Congress and Exhibition

International Powder Metallurgy Congress and Exhibition, Euro PM 2017
Milan, Italy,

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Annan kemi

Metallurgi och metalliska material

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Senast uppdaterat

2020-05-20