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Articles 661 - 665 of 665
Full-Text Articles in Materials Science and Engineering
Kinetics Of Carbonisation, Microstructure And Properties Of Al-Al4c3 System Prepared By Mechanical Alloying, M Besterci
Kinetics Of Carbonisation, Microstructure And Properties Of Al-Al4c3 System Prepared By Mechanical Alloying, M Besterci
Journal of Metals, Materials and Minerals
The method of mechanical alloying process is described. Carbon transformation to carbide Al4C3 is characterised within different heat treatment schedules and nine commercial carbon powders are tested. The micromechanism of carbon incorporation into the metallic powder, and the compacting of it are described. The influence of dispersed carbides on mechanical properties is evaluated together with the influence of deformation on microstructure and properties.
Fractures Of As-Cast Low-Carbon Steels In The Plasticity Degradation Area At High Testing Temperatures, A Ševčík, J Ševčíková
Fractures Of As-Cast Low-Carbon Steels In The Plasticity Degradation Area At High Testing Temperatures, A Ševčík, J Ševčíková
Journal of Metals, Materials and Minerals
The work studies the fractures of low-carbon steels after tensile tests in a temperature interval from ca 1200°C, where a plasticity degradation takes place, up to the liquid phase formation temperature. Statistical analyses of the temperature dependence of the reduction of area were made with the aim to determine integral effects of the chemical composition on the plasticity course. In the plasticity degradation temperature area, intercrystalline fractures occur, which have several morphologies, even within the same steel grade. Besides typical intercrystalline fractures, a fine-grained, interdendritic fracture often occurs. A specific case is the failure of steels in the γ + …
Mechanical Properties Of Skin Wounds After Atropa Belladonna Application In Rats, T Toporcer, T Grendel, B Vidinský, P Gál, J Sabo, R Hudák
Mechanical Properties Of Skin Wounds After Atropa Belladonna Application In Rats, T Toporcer, T Grendel, B Vidinský, P Gál, J Sabo, R Hudák
Journal of Metals, Materials and Minerals
Atropa belladonna is a topical agent used in the treatment of skin wounds in Slovak folk medicine. The aim of this study was to asses the effect of A. belladonna extract on wound tensile strength in Sprague-Dawley rats. Twenty four rats were randomly divided into 3 groups of 8 animals. Two symmetrical skin incisions were performed on the back of each animal and immediately sutured. In the 1st group A. belladonna extract was not applied and the group served as a control. The animals in the 2nd group were treated by daily application of A. Belladonna extract during the first …
Comparison Of Gelatin And Collagen Scaffolds For Fibroblast Cell Culture, J Ratanavaraporn, S Damrongsakkul, N Sanchavanakit, T Banaprasert, S Kanokpanont
Comparison Of Gelatin And Collagen Scaffolds For Fibroblast Cell Culture, J Ratanavaraporn, S Damrongsakkul, N Sanchavanakit, T Banaprasert, S Kanokpanont
Journal of Metals, Materials and Minerals
Gelatin and collagen were used to produce the scaffold for fibroblast cell culture. The properties of scaffolds obtained from type A and type B gelatin were compared to scaffold obtained from collagen, which is widely used in skin substitute. Porous scaffolds were prepared by freeze drying and dehydrothermal (DHT) crosslinking method. DHT treatment time was performed at 24 and 48 h and the degree of crosslinking was determined by 2,4,6-trinitrobenzene sulphonic acid (TNBS). The morphology of scaffolds was investigated by scanning electron microscopy (SEM). The compressive modulus and swelling ratio of the scaffolds were reported. To confirm the applicability of …
Multilayered Systems Of Nanostructured Tib2 Thin Films And Its Mechanical Properties, N Panich, P Wangyao, S Hannongbua, P Sricharoenchai, S Sun
Multilayered Systems Of Nanostructured Tib2 Thin Films And Its Mechanical Properties, N Panich, P Wangyao, S Hannongbua, P Sricharoenchai, S Sun
Journal of Metals, Materials and Minerals
This study focuses on the development of single and multilayer TiB2 coatings with Ti interlayer with the aim of improving the mechanical integrity of the coating-substrate system. The nanostructured TiB2 thin films and multilayered coatings were deposited on high speed steel substrates by magnetron sputtering. The resultant coating systems were evaluated with respect to microstructure, fractured cross-section and fundamental properties such as cross-sectioned fracture, surface roughness, hardness, modulus and coating adhesion to the substrate. It was found that the adhesion strength of TiB2 coating to HSS substrate could be significantly enhanced in the multilayer system, and by a proper combination …