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Characteristics and properties for iron powder with flow additives

Lidman, Linus LU (2019) FKMM01 20191
Materials Engineering
Abstract
Powders are complex systems that depend strongly on how the individual particles in- teract and their surroundings. Understanding powders behaviour under certain conditions is very important for the product in many applications, one of them being Additive Manu- facturing (AM).
The overall goal of this study is to understand and quantify the effect of flow additives in combination with iron powder. To acquire a solid understanding a number of character- isation methods, Hall flow rate, apparent density, tapped density, FT4 rheometer, Fourier Transformed Infrared spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDS) and the Tester will be used to analyse the powder mixtures thoroughly.... (More)
Powders are complex systems that depend strongly on how the individual particles in- teract and their surroundings. Understanding powders behaviour under certain conditions is very important for the product in many applications, one of them being Additive Manu- facturing (AM).
The overall goal of this study is to understand and quantify the effect of flow additives in combination with iron powder. To acquire a solid understanding a number of character- isation methods, Hall flow rate, apparent density, tapped density, FT4 rheometer, Fourier Transformed Infrared spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDS) and the Tester will be used to analyse the powder mixtures thoroughly. Furthermore, three methods used to apply the flow additive to the iron powder particles are investigated.
Results show that the additive concentration is a very important factor and for many responses show a quadratic relationship, an optimum was observed at the concentration 0.01 wt%. This optimum concentration generates the best powder packing and Hall flow rate for all processing methods out of the different concentrations used. It is, however, likely that even better results could be achieved somewhere in between data points. The optimum concentration is dependent on flow additive type and size as well as base powder type, size and morphology. Regarding the processing methods, the Cyclo mixer deforms the powder particles at the intensity used, resulting in inconsistent responses. The Nauta mixer produced the best surface coverage, although more tests should be conducted to clearly separate it from the low intensity Windmill-tumbler. (Less)
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author
Lidman, Linus LU
supervisor
organization
course
FKMM01 20191
year
type
H2 - Master's Degree (Two Years)
subject
language
English
id
8980364
date added to LUP
2019-06-11 08:15:00
date last changed
2019-06-11 08:15:00
@misc{8980364,
  abstract     = {Powders are complex systems that depend strongly on how the individual particles in- teract and their surroundings. Understanding powders behaviour under certain conditions is very important for the product in many applications, one of them being Additive Manu- facturing (AM).
The overall goal of this study is to understand and quantify the effect of flow additives in combination with iron powder. To acquire a solid understanding a number of character- isation methods, Hall flow rate, apparent density, tapped density, FT4 rheometer, Fourier Transformed Infrared spectroscopy (FT-IR), Scanning Electron Microscopy (SEM), Energy Dispersive X-Ray Spectroscopy (EDS) and the Tester will be used to analyse the powder mixtures thoroughly. Furthermore, three methods used to apply the flow additive to the iron powder particles are investigated.
Results show that the additive concentration is a very important factor and for many responses show a quadratic relationship, an optimum was observed at the concentration 0.01 wt%. This optimum concentration generates the best powder packing and Hall flow rate for all processing methods out of the different concentrations used. It is, however, likely that even better results could be achieved somewhere in between data points. The optimum concentration is dependent on flow additive type and size as well as base powder type, size and morphology. Regarding the processing methods, the Cyclo mixer deforms the powder particles at the intensity used, resulting in inconsistent responses. The Nauta mixer produced the best surface coverage, although more tests should be conducted to clearly separate it from the low intensity Windmill-tumbler.},
  author       = {Lidman, Linus},
  language     = {eng},
  note         = {Student Paper},
  title        = {Characteristics and properties for iron powder with flow additives},
  year         = {2019},
}