Details
| Original language | English |
|---|---|
| Pages (from-to) | 373-380 |
| Number of pages | 8 |
| Journal | International Journal of Materials Research |
| Volume | 109 |
| Issue number | 5 |
| Early online date | 28 Apr 2018 |
| Publication status | Published - 15 May 2018 |
Abstract
By applying vibrations to a granular media differing in size and density, various segregation states can be established. If an additional rotational motion is engaged, the effective force is no longer gravity but a centrifugal one, leading to a radial segregation. In this contribution, an experimental setup is presented which utilizes these effects. This setup is used to produce a cylindrical metal matrix composite consisting of silicon carbide and aluminium having a radial gradient. The influence of different material- and process-specific parameters on the segregation behaviour was investigated. The evaluation of micrographs of the pressed and sintered samples shows that both positive and negative gradients can be achieved. The rotation speed and the grain size ratio were identified as significant factors. The variation of the vibration amplitude leads to opposite effects. On the one hand, the gradient intensity increased. On the other hand, the variances of the SiC distribution in the tangential or radial directions increased as well. In addition, it has been shown that the effects of different grain shapes are marginal.
Keywords
- Brazil nut effect (BNE), Functionally graded materials (FGM), Metal matrix composite (MMC), Powder metallurgy (PM)
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Chemistry(all)
- Physical and Theoretical Chemistry
- Materials Science(all)
- Metals and Alloys
- Materials Science(all)
- Materials Chemistry
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In: International Journal of Materials Research, Vol. 109, No. 5, 15.05.2018, p. 373-380.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Manufacturing of functionally graded metal matrix composite materials by segregation
AU - Behrens, Bernd Arno
AU - Bohr, Dieter
N1 - © 2018, Carl Hanser Verlag, München
PY - 2018/5/15
Y1 - 2018/5/15
N2 - By applying vibrations to a granular media differing in size and density, various segregation states can be established. If an additional rotational motion is engaged, the effective force is no longer gravity but a centrifugal one, leading to a radial segregation. In this contribution, an experimental setup is presented which utilizes these effects. This setup is used to produce a cylindrical metal matrix composite consisting of silicon carbide and aluminium having a radial gradient. The influence of different material- and process-specific parameters on the segregation behaviour was investigated. The evaluation of micrographs of the pressed and sintered samples shows that both positive and negative gradients can be achieved. The rotation speed and the grain size ratio were identified as significant factors. The variation of the vibration amplitude leads to opposite effects. On the one hand, the gradient intensity increased. On the other hand, the variances of the SiC distribution in the tangential or radial directions increased as well. In addition, it has been shown that the effects of different grain shapes are marginal.
AB - By applying vibrations to a granular media differing in size and density, various segregation states can be established. If an additional rotational motion is engaged, the effective force is no longer gravity but a centrifugal one, leading to a radial segregation. In this contribution, an experimental setup is presented which utilizes these effects. This setup is used to produce a cylindrical metal matrix composite consisting of silicon carbide and aluminium having a radial gradient. The influence of different material- and process-specific parameters on the segregation behaviour was investigated. The evaluation of micrographs of the pressed and sintered samples shows that both positive and negative gradients can be achieved. The rotation speed and the grain size ratio were identified as significant factors. The variation of the vibration amplitude leads to opposite effects. On the one hand, the gradient intensity increased. On the other hand, the variances of the SiC distribution in the tangential or radial directions increased as well. In addition, it has been shown that the effects of different grain shapes are marginal.
KW - Brazil nut effect (BNE)
KW - Functionally graded materials (FGM)
KW - Metal matrix composite (MMC)
KW - Powder metallurgy (PM)
UR - http://www.scopus.com/inward/record.url?scp=85047019754&partnerID=8YFLogxK
U2 - 10.3139/146.111619
DO - 10.3139/146.111619
M3 - Article
AN - SCOPUS:85047019754
VL - 109
SP - 373
EP - 380
JO - International Journal of Materials Research
JF - International Journal of Materials Research
SN - 1862-5282
IS - 5
ER -