Wyniki wyszukiwania - BazTech

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Microstructure and Properties of TiC/Ti Coatings Deposited by the Supersonic Cold Gas Spray Technique

Kusiński J., Kac S., Kowalski K., Dosta S., Georgiou E. P., Garcia-Forgas J., Matteazzi P.

Archives of Metallurgy and Materials

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2018

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Vol. 63, iss. 2

867--873

EN

Nanostructured, biocompatible, TiC/Ti Supersonic Cold Gas Sprayed coatings were deposited onto a Ti6Al4V alloy and their microstructure, wear resistance and hardness were investigated. The starting nanostructured powder, containing a varied mixture of Ti and TiC particles, was produced by high energy ball milling. Scanning and transmission electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray diffraction were used for structural and chemical analyses of powder particles and coatings. Coatings, 250-350 μm thick, preserving the nanostructure and chemical powder composition, with low porosity and relatively high hardness (~850 HV), were obtained. These nanostructured TiC/Ti coatings exhibited better tribological properties than commonly used biomedical benchmark materials, due to an appropriate balance of hard and soft nano-phases.

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Laser modification of the materials surface layer - a review paper

Kusiński J., Kac S., Kopia A., Radziszewska A., Rozmus-Górnikowska M., Major B., Major L., Marczak J., Lisiecki A.

Bulletin of the Polish Academy of Sciences. Technical Sciences

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2012

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Vol. 60, nr 4

711-728

EN

The state of laser processing in surface materials modification in Poland is reported, based on own experience, coworkers and coauthors results, as well the literature review. The curriculum concerning historical development of lasers and laser technology in Poland, laser-matter interaction, as well basis of different laser techniques applied in materials surface engineering (solid state hardening, melting, alloying, cladding, ablation, shot peening, cleaning and texturing) are reviewed, and compared with results of coauthors, as well with a wide range of Polish authors papers. Finally, it is concluded that overall state of research on laser application in surface engineering in Poland is well developed and still growing industrial application is observed.

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Laserowa powierzchniowa obróbka stopu Al-Si

Radziszewska A., Kac S., Kusiński J.

Hutnik, Wiadomości Hutnicze

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2006

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Vol. 73, nr 4

183-188

PL

W pracy przedstawiono proces laserowego wzbogacania podeutektycznego stopu Al-Si niklem. W celu otrzymania lepszych własności wzbogaconych warstw wierzchnich dokonano doboru odpowiednich parametrów procesu. W artykule pokazano wyniki badań dokonane za pomocą skaningowego mikroskopu elektronowego z przystawką EDS, badania mikrotwardości warstw wierzchnich. Otrzymane warstwy wierzchnie charakteryzowały się rozdrobnioną strukturą krystaliczną. Następowało ujednorodnienie składu chemicznego oraz wzrost twardości w stosunku do materiału podłożą.

EN

In this paper the method of laser surface alloying of Al-Si with nickel is presented. A suitable parameters of the process were found for better properties of the surface layer. The results of SEM microstructure observations, EDS chemical composition analysis as well as cross - sectional microhardness distribution were presented. The scanning electron micrographs show the very fine structure. The chemical composition after this treatment in the surface layer was homogeneous and the increase of the microhardness was observed.

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Laserowe stopowanie stali niskowęglowej węglikiem krzemu

Radziszewska A., Kusiński J., Kac S.

Hutnik, Wiadomości Hutnicze

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2005

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Vol. 72, nr 4

232-237

PL

W artykule przedstawiono mikrostrukturę i własności (skład chemiczny, mikrotwardość, odporność na zużycie) wzbogaconej laserowo węglikiem krzemu warstwy wierzchniej stali niskowęglowej. Badania wykonane za pomocą skaningowego elektronowego mikroskopu wykazały występowanie struktury komórkowej oraz płaskiego frontu krzepnięcia. Nasycenie krzemem zaobserwowano w strefie wzbogaconej. Najwyższe wartości twardości osiągnięto w przypadku próbek po laserowym wtapianiu SiC, w których lepiszcze było organiczne.

EN

The paper describes the microstructure and properties (chemical composition, microhardness, and wear resistance) of the laser alloyed with silicon carbide surface layer. The scanning electron micrographs show the cellular structure and the planar solidification front next to the base. The microprobe analysis showed the higher silicon content in the laser alloyed zone than the substrate. Samples covered with SiC and the carbon containing binder showed after laser alloying higher hardness than in case of using silicon containing binder.