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Observed phenomena during the development of an adhesion test for coated medical devices Torda László SÉLLEY1,a, Anna KERTÉSZ1, Eszter BOGNÁR1,2 1Department of Materials Science and Engineering, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Bertalan Lajos utca 7, 1111 Budapest, Hungary 2MTA–BME Research Group for Composite Science and Technology, Műegyetem rkp. 3, 1111 Budapest, Hungary aselley.torda@gmail.com Keywords: adhesion, biocompatible polymer, biocompatible metal, coating, PUR, PLGA, stainless steel Abstract Devices used in the field of medical technology require high biocompatibility.
Feldman, et al, Coronary stents: A materials perspective, Biomaterials 28 (2007) 1689-1710
El-Shabasí, Perspective of adhesion of thin films, Electrical Engineering and Computer Science, (1981) 25-2 123-134
Dauskardt, Adhesion of polymer thin-films and patterned lines, International Journal of Fracture (2003) 119/120 475-485
Newson, Stainless Steel – A Family of Medical Device Materials, Business Briefing: Medical Device Manufacturing & Technology (2002) London (UK)

Photoacoustic spectroscopy enables characterization of electronic, optical and defect structures with the purpose of defining the electronic states and structural disorders of various materials.
However, the results obtained for zinc-stannate thin films though unusual have been observed for other materials, such as SnO2 [21] where the mobility for electrons was determined µn=200-300 cm2/Vs and the mobility for holes µp=300 cm2/Vs.
Minority carrier mobility is a parameter whose values could be useful for characterizing solar cell materials, as the minority carriers in absorber materials can be indicators of device performance.
This research was performed within projects 1832 and 6150 financed by the Ministry of Science and Environmental Protection of the Republic of Serbia.
Choi: Journal of Electroceramics Vol. 8 (2002), p. 249

Dashed red line in figures separates the base material and ICHAZ region.
Summary Heat affected zone simulations were executed for quenched- and tempered materials.
Kömi, Physical Simulation for Evaluating Heat-Affected Zone Toughness of High and Ultra-High Strength Steels, Materials Science Forum. 762 (2013) 711–716
Kömi, Investigation of CGHAZ Simulations of Low-Carbon Bainitic Steels, Materials Science Forum. 1016 (2021) 1869–1874
Zhang, Effect of molybdenum on the impact toughness of heat‐affected zone in high-strength low-alloy steel, Materials. 14 (2021).

Conduction Properties Study on Alginate Incorporated with Glycolic Acid Based Solid Biopolymer Electrolytes Ahmad Faizrin Ahmad Fuzlin1,a, Izan Izwan Misnon2,b and Ahmad Salihin Samsudin1,c* 1Ionic Materials Team, Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, 26300 Kuantan, Pahang, Malaysia 2Nanostructured Renewable Energy Materials Laboratory, Faculty of Industrial Sciences & Technology, Universiti Malaysia Pahang, 26300 Kuantan, Pahang, Malaysia *Corresponding author: ahmadsalihin@ump.edu.my Keywords: alginate, solid biopolymer electrolytes, conduction properties, electrical properties.
Medical, construction, food, technology are the main example of industry that mostly focused on the polymer materials.
However, synthetic polymers contributed to one of the spearheading factors in environmental deterioration given their production, application, and disposal, all lead to pollution by adding non-degradable materials to soils and toxic gases to the atmosphere.
In addition, alginate is a water-soluble linear polysaccharide which naturally contains carboxyl groups in each constituent residue and possesses various abilities for functional materials [4].
Journal of Polymer Research 23 (2016) 162

Machining of new materials.
Science and Tech.; 64:289-297
Multi-layers materials.
Materials Forming; 1(1):949-952
Journal of Materials Processing Technology. 183, 88-95.

Williams [2] proposed a two-parameter approach for the isotropic linear elastic materials.
On the other hand, out-of-plane crack tip constraint is also known to have a significant influen- ce on the fracture behavior of materials, and work have been done to express this constraint along the 3D crack front by the out-of-plane -stress [1].
That is, the singularity as described in Eq. (1) occurs only near crack front points embedded entirely in material.
Acknowledgments This paper was supported by National Natural Science Foundation of China and by the 111 Project Nos.
Vol. 29 (1992), p.1597-1611 [14] Junhua Zhao, Wanlin Guo: International Journal of Fatigue.

Introduction At the present time, the metal bar is a common-used structural material in the manufacturing industry, and is widely used to make into various parts, such as gears, shafts, flanges, chain pins and so on.
High-quality cross-sections are obtained from different materials, which prove that the cropping method by means of the radial forging in precision cropping is feasible.
Acknowledgements The author wishes to express gratitude to the National Science and Technology Major Project (Approval No.2009ZX0414-074), the Hi-tech Research and Development Program of China(Approval No.2007AA04Z144) .
References [1] Chen JD, Wang YW, Yu DH, Zhang ZG (1992), Brittle Precision Cropping of Metal Materials.
Journal of Xi’An jiao Tong University. 2004, 38 (9): 947-950

Although the maximum working stress is less than the ultimate strength of the material, stress concentration in the area of local caused small micro crack initiation, with an increasing number of cycles, micro crack expanded gradually, finally to transient faults.
Maximum stress value of the piston rod with rounded corners was still less than the ultimate strength of materials, but the stress concentration at the fillet resulted in the fracture of rods.
Nonlinear finite element analysis of the piston rod under the impact load. edtied by Applied Mechanics and Materials(2013)
Nonlinear finite element analysis of the mechanical properties of the leaf spring. edtied by Mechanical Science and Technology (2008),
Mechanical properties of finite element analysis of concrete filled square steel. edtied by Journal of Wuhan University(2004)

Introduction With the continuous progress of science and technology, and with the continuous development of manufacturing industries, accuracy and surface quality of the mechanical parts are required increasingly high; various high hardness materials are used increasingly.
Workpiece mounting 2.3 The Main Technical Parameters (1) Grinding diameter: 50mm; (2) Grinding length: 120mm; (3) The diameter and width of grinding wheel are 400mm and 150mm respectively; (4) The diameter and width of guide wheel are 300mm and 150mm respectively; (5) The Vertical rotation angle of guide wheel: -～; (6) The speeds of guide wheel at work and amendments are 20~100r/min and 200r/min respectively; The speed of grinding Wheel: 1668r/min; (7) Dimensions of machine tool/ mm (L × W × H): 1920 × 1680 × 1868; (8) Centerless cylindrical grinding machine in this design can be used to process optical axis, the stepped shaft with shaft shoulder; precision IT7 the following; Ra1.6 ~ Ra0.4; materials: 45, 40 cr, ductile iron, and so on.
(2) Belt material: polyurethane
Journal of Ezhou University.2010,17(2):24-28

In this paper, the effect of uncertainty in material parameters on the randomness of the natural frequencies is presented using a new technique called Random Factor Method.
Numerical Examples Fig.1.The graph of rotor system model Fig.2.The graph of simplified calculation model for rotor system The simplified example of a single rotor system shows in Fig. 1, straddle supported rotor using symmetrical structure, m is the equivalent mass of the rotor, taking the rotating shaft as isotropic materials, the stiffness is k.
At the same time, takingthe stiffness of sliding bearing at equivalentstrut as anisotropy materials, along with the horizontal and vertical directions are ,,respectively.
Acknowledgements Supported by the National Natural Science Foundation of China (No. 51175071), the Fundamental Research Funds for the Central Universities (No.N120203001¸N130803001).
Journal of Sound and Vibration 190 (5):821-841. doi:10.1006/jsvi.1996.0095 [3] Zhang Y, Der Kiureghian A (1993) Dynamic response sensitivity of inelastic structures.