Open Access
Materials, volume 14, issue 24, pages 7895
Microstructure and defect-based fatigue mechanism evaluation of brazed coaxial ti/al2 o3 joints for enhanced endoprosthesis design
Otto Johannes L
1
,
Fedotov Ivan
2
,
Penyaz Milena
2
,
Schaum Thorge
1
,
Kalenborn Anke
1
,
Kalin Boris
2
,
Sevryukov Oleg
2
,
Publication type: Journal Article
Publication date: 2021-12-20
PubMed ID:
34947498
General Materials Science
Abstract
Alumina-based ceramic hip endoprosthesis heads have excellent tribological properties, such as low wear rates. However, stress peaks can occur at the point of contact with the prosthesis stem, increasing the probability of fracture. This risk should be minimized, especially for younger and active patients. Metal elevations at the stem taper after revision surgery without removal of a well-fixed stem are also known to increase the risk of fracture. A solution that also eliminates the need for an adapter sleeve could be a fixed titanium insert in the ceramic ball head, which would be suitable as a damping element to reduce the occurrence of stress peaks. A viable method for producing such a permanent titanium-ceramic joint is brazing. Therefore, a brazing method was developed for coaxial samples, and two modifications were made to the ceramic surface to braze a joint that could withstand high cyclic loading. This cyclic loading was applied in multiple amplitude tests in a self-developed test setup, followed by fractographic studies. Computed tomography and microstructural analyses-such as energy dispersive X-ray spectroscopy-were also used to characterize the process-structure-property relationships. It was found that the cyclic loading capacity can be significantly increased by modification of the surface structure of the ceramic.
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Otto J. L. et al. Microstructure and defect-based fatigue mechanism evaluation of brazed coaxial ti/al2o3 joints for enhanced endoprosthesis design // Materials. 2021. Vol. 14. No. 24. p. 7895.
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Otto J. L., Fedotov I., Penyaz M., Schaum T., Kalenborn A., Kalin B., Sevryukov O., Walther F. Microstructure and defect-based fatigue mechanism evaluation of brazed coaxial ti/al2o3 joints for enhanced endoprosthesis design // Materials. 2021. Vol. 14. No. 24. p. 7895.
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TY - JOUR
DO - 10.3390/ma14247895
UR - https://doi.org/10.3390%2Fma14247895
TI - Microstructure and defect-based fatigue mechanism evaluation of brazed coaxial ti/al2o3 joints for enhanced endoprosthesis design
T2 - Materials
AU - Kalenborn, Anke
AU - Kalin, Boris
AU - Sevryukov, Oleg
AU - Fedotov, Ivan
AU - Penyaz, Milena
AU - Otto, Johannes L
AU - Schaum, Thorge
AU - Walther, Frank
PY - 2021
DA - 2021/12/20 00:00:00
PB - Multidisciplinary Digital Publishing Institute (MDPI)
SP - 7895
IS - 24
VL - 14
PMID - 34947498
SN - 1996-1944
ER -
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@article{2021_Otto,
author = {Anke Kalenborn and Boris Kalin and Oleg Sevryukov and Ivan Fedotov and Milena Penyaz and Johannes L Otto and Thorge Schaum and Frank Walther},
title = {Microstructure and defect-based fatigue mechanism evaluation of brazed coaxial ti/al2o3 joints for enhanced endoprosthesis design},
journal = {Materials},
year = {2021},
volume = {14},
publisher = {Multidisciplinary Digital Publishing Institute (MDPI)},
month = {dec},
url = {https://doi.org/10.3390%2Fma14247895},
number = {24},
pages = {7895},
doi = {10.3390/ma14247895}
}
Cite this
MLA
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Otto, Johannes L., et al. “Microstructure and defect-based fatigue mechanism evaluation of brazed coaxial ti/al2o3 joints for enhanced endoprosthesis design.” Materials, vol. 14, no. 24, Dec. 2021, p. 7895. https://doi.org/10.3390%2Fma14247895.