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Mikroobróbka laserowa

100%

Woźniak A. , Adamiak M.

tom R. 26, nr 2

45--50

Optyczna spektroskopia podczerwieni cienkich warstw FTIR - podstawy identyfikacji widm poliazometin

70%

Hajduk B. , Jarka P. , Bednarski H. , Tański T. , Woźniak A.

LAB Laboratoria, Aparatura, Badania

2021

tom R. 26, nr 3

48--51

Assessment of the Conveyor Belt Strength Decrease due to the Long Term Exploitation in Harmful Conditions

61%

Kurpanik K. , Sławski S. , Machoczek T. , Woźniak A. , Duda S. , Kciuk S.

tom Vol. 18, no 4

1--11

Bucket conveyors are widely used in various industrial sectors due to their efficiency in material transport. However, like any machinery, they are susceptible to degradation during operation, leading to a decrease in performance and an increase in the risk of failure. Therefore, research was conducted to understand the impact of operation on bucket conveyor belts. In the study, samples were prepared from different locations and sections of the belt to investigate potential differences in material properties and strength. A series of mechanical tests, including a static tensile test, were conducted to assess the material strength. The results of the research revealed differences in mechanical properties among samples from different locations and belt sections. Furthermore, potential damages that may occur with incorrect handling were unveiled. These findings are crucial for industrial practices, providing a better understanding of factors influencing the durability and efficiency of bucket conveyor belts.

Properties of biodegradable polymer coatings with hydroxyapatite on a titanium alloy substrate

51%

Goldsztajn K. , Godzierz M. , Hercog A. , Władowski M. , Jaworska J. , Jelonek K. , Woźniak A. , Kajzer W. , Orłowska A. , Szewczenko J.

tom Vol. 26, no. 1

121--132

Titanium alloys are among the most widely used materials in medicine, especially in orthopedics. However, their use requires the application of an appropriate surface modification method to improve their properties. Such methods include anodic oxidation and the application of polymer coatings, which limit the release of alloying element ions. In addition, biodegradable polymer coatings can serve as a carrier for drugs and other substances. The paper presents the results of research on the physical properties of biodegradable polymer coatings containing na-noparticle hydroxyapatite on a titanium alloy substrate. Methods: A PLGA coating was used in the tests. The coatings on the substrate of the anodized Ti6Al7Nb alloy were applied by ultrasonic spray coating. The tests were carried out for coatings with various hydroxyapatite content (5, 10, 15, 20%) and thickness resulting from the number of layers applied (5, 10, 15 layers). The scope of the research included microscopic observations using scanning electron microscopy, topography tests with optical profilometry, structural studies using X-ray diffraction, as well as wettability and adhesion tests. Results: The results shows that with the use of ultrasonic spray coating system is possible to obtain the continuous coatings containing hydroxyapaptite. Conclusions: The properties of the coating can be controlled by changing the percentage of hydroxyapatite and the number of layers of which the coating is composed.