scholarly journals The effect of layer architecture on the tribological behaviour of coatings

2018 ◽  
Vol 188 ◽  
pp. 04016
Author(s):  
Serap Gümüs ◽  
Şeyda Polat ◽  
Juergen M. Lackner ◽  
Wolfgang Waldhauser
Keyword(s):  
Surface Properties ◽  
Joint Replacement ◽  
Physical Vacuum ◽  
Vacuum Deposition ◽  
Tribological Behaviour ◽  
Spinal Implants ◽  
Mechanical Durability ◽  
Grade Material ◽  
Medical Grade

PEEK is a medical grade material which is increasingly used instead of titanium in osteosynthesis and joint replacement. However, its surface properties of PEEKlack on an adequate osteoconductivity. In this study, two coatings with different architectures composed of Ti, Mg and Ag were prepared by physical vacuum deposition to be used in spinal implants. The mechanical durability of the coatings is investigated in terms of their tribological behaviour.

scholarly journals Prototype of a Textronic Sensor Created with a Physical Vacuum Deposition Process for Staphylococcus aureus Detection

Sensors ◽  
2020 ◽  
Vol 21 (1) ◽  
pp. 183
Author(s):  
Ewa Korzeniewska ◽  
Artur Szczęsny ◽  
Piotr Lipiński ◽  
Tomasz Dróżdż ◽  
Paweł Kiełbasa ◽  
...  
Keyword(s):  
Staphylococcus Aureus ◽  
Deposition Process ◽  
Physical Vacuum ◽  
Vacuum Deposition ◽  
Electrical Parameters ◽  
Bacterial Cultures ◽  
Measurement Signal

Staphylococcus aureus is a bacterium which people have been in contact with for thousands of years. Its presence often leads to severe disorders of the respiratory and circulatory systems. The authors of this article present a prototype of a textronic sensor enabling the detection of this bacterium. This sensor was created using a process of physical vacuum deposition on a flexible textile substrate which can be implemented on clothing. With increasing numbers of bacterial colonies, changes in the sensor’s electrical parameters were observed. The sensor’s resistance reduced by 50% and the capacitance more than doubled within the first two days of starting bacterial cultures. Extensive changes in electrical parameters were observed at 100 Hz and 120 Hz of the measurement signal.

ATZ – A New Material with a High Potential in Joint Replacement

2005 ◽  
Vol 284-286 ◽  
pp. 983-986 ◽  
Author(s):  
Sabine Begand ◽  
Wilfried Glien ◽  
Thomas Oberbach
Keyword(s):  
Phase Composition ◽  
Surface Properties ◽  
Hydrothermal Treatment ◽  
Joint Replacement ◽  
Single Phase ◽  
High Potential ◽  
New Material ◽  
Mixed Ceramic

The present study has been aimed to combine the advantages of the two single-phase materials, Al2O3 and ZrO2 while avoiding their disadvantages, by producing a mixed ceramic. Within a study of an ATZ ceramic we tested the influence of aging by a hydrothermal treatment on the strength, phase composition and surface properties. We found that the hydrothermal treatment of the ATZ ceramic did not significantly influence these parameters, unlike those of a single-phase ZrO2 ceramic.

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