Details
| Original language | English |
|---|---|
| Pages (from-to) | 31-40 |
| Number of pages | 10 |
| Journal | Journal of Ceramic Science and Technology |
| Volume | 6 |
| Issue number | 1 |
| Early online date | 23 Sept 2014 |
| Publication status | Published - Jan 2015 |
Abstract
In recent years, there has been steady growth in the application of complex-shaped joint replacement implants and wear-resistant ceramics as implant material. The challenge of implant production remains finishing to an average surface roughness of 20 nm. Tools with elastically bonded diamonds combine grinding and loose abrasive polishing to achieve a high finish with low material removal and thus high shape accuracy - a so-called fine grinding process. This work addresses the working principle of elastic diamond tools in the fine grinding process and the influence of process parameters on the roughness of bioceramics for knee implants. A physical-empirical roughness model based on the number of cutting grains and grain forces was developed and verified as part of the study. The results confirm the hypothesis that the increase of the single-grain force results in the reduction of the surface peaks while taking into account the bond characteristics. For automated use as machine tools for the finishing of all-ceramic implants, continuous wear detection and compensation, by e.g. force controlled polishing, and the temperature stability of the bonds have to be developed.
Keywords
- Biomedical ceramics, Elastic tool, Knee implant, Processing by polishing and fine grinding, Surface topography
ASJC Scopus subject areas
- Materials Science(all)
- Ceramics and Composites
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In: Journal of Ceramic Science and Technology, Vol. 6, No. 1, 01.2015, p. 31-40.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Fine Grinding of Bioceramics for Knee Implants with Elastically Bonded Abrasives
T2 - Process modeling and validation
AU - Müller, A.
AU - Denkena, B.
PY - 2015/1
Y1 - 2015/1
N2 - In recent years, there has been steady growth in the application of complex-shaped joint replacement implants and wear-resistant ceramics as implant material. The challenge of implant production remains finishing to an average surface roughness of 20 nm. Tools with elastically bonded diamonds combine grinding and loose abrasive polishing to achieve a high finish with low material removal and thus high shape accuracy - a so-called fine grinding process. This work addresses the working principle of elastic diamond tools in the fine grinding process and the influence of process parameters on the roughness of bioceramics for knee implants. A physical-empirical roughness model based on the number of cutting grains and grain forces was developed and verified as part of the study. The results confirm the hypothesis that the increase of the single-grain force results in the reduction of the surface peaks while taking into account the bond characteristics. For automated use as machine tools for the finishing of all-ceramic implants, continuous wear detection and compensation, by e.g. force controlled polishing, and the temperature stability of the bonds have to be developed.
AB - In recent years, there has been steady growth in the application of complex-shaped joint replacement implants and wear-resistant ceramics as implant material. The challenge of implant production remains finishing to an average surface roughness of 20 nm. Tools with elastically bonded diamonds combine grinding and loose abrasive polishing to achieve a high finish with low material removal and thus high shape accuracy - a so-called fine grinding process. This work addresses the working principle of elastic diamond tools in the fine grinding process and the influence of process parameters on the roughness of bioceramics for knee implants. A physical-empirical roughness model based on the number of cutting grains and grain forces was developed and verified as part of the study. The results confirm the hypothesis that the increase of the single-grain force results in the reduction of the surface peaks while taking into account the bond characteristics. For automated use as machine tools for the finishing of all-ceramic implants, continuous wear detection and compensation, by e.g. force controlled polishing, and the temperature stability of the bonds have to be developed.
KW - Biomedical ceramics
KW - Elastic tool
KW - Knee implant
KW - Processing by polishing and fine grinding
KW - Surface topography
UR - http://www.scopus.com/inward/record.url?scp=84926644676&partnerID=8YFLogxK
U2 - 10.4416/JCST2014-00024
DO - 10.4416/JCST2014-00024
M3 - Article
AN - SCOPUS:84926644676
VL - 6
SP - 31
EP - 40
JO - Journal of Ceramic Science and Technology
JF - Journal of Ceramic Science and Technology
SN - 2190-9385
IS - 1
ER -