Search results

1

Electrical and Thermal Properties of Na1–xLixNbO3 (x = 0.08, 0.1 and 0.2) Ceramics Near the Morphotropic Phase Boundary Region

100%

Konieczny K., Czaja P.

Archives of Metallurgy and Materials

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2017

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vol. 62

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issue 2

2

Application of the Autocorrelation Function and Fractal Geometry Methods for Analysis of MFM Images

81%

Czaja P., Bramowicz M., Kulesza S., Maziarz W.

Archives of Metallurgy and Materials

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2014

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issue 2

3

Effect of Sb and MnO2-Doping on Phase Transitions, Crystal Structure, Thermal, Dielectric, Ferroelectric and Piezoelectric Properties of Na0.5K0.5NbO3 Ceramics

71%

Suchanicz J., Faszczowy I., Czaja P., Kusz J., Zubko M.

Archives of Metallurgy and Materials

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2018

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vol. 63

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issue 2

4

Influence of Fe Addition on the Martensitic Transformation, Structure and Magnetic Properties of Metamagnetic Ni-Co-Mn-Sn Alloys

61%

Wójcik A., Maziarz W., Szczerba M., Sikora M., Hawełek Ł., Czaja P.

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2016

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vol. 130

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issue 4

1026-1028

EN

In this study the effect of Fe for Ni substitution in Ni₄₄Co₆Mn₃₉Sn₁₁ metamagnetic shape memory alloys on their structure, magneto-structural transformation characteristics, magnetic and magnetocaloric properties was studied. The results show that the structure and martensite transformation behavior strongly depends on the Fe concentration. The martensitic transformation temperature decreases with 1 at.% of Fe and is suppressed with higher Fe content. It was further found that substitution of Fe for Ni leads to lowering of the value of magnetic entropy change.

5

Structure And Martensitic Transformation in Ni44Mn43.5Sn12.5-xAlx Heusler Alloys

61%

Maziarz W., Lityńska-Dobrzyńska L., Major Ł., Czaja P., Dutkiewicz J., Góral A., Czeppe T.

Archives of Metallurgy and Materials

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2013

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issue 2

6

Application of Atomic Force Microscopy for Studies of Fractal and Functional Properties of Biomaterials

61%

Kulesza S., Bramowicz M., Czaja P., Jabłoński R., Kropiwnicki J., Charkiewicz M.

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2016

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vol. 130

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issue 4

1013-1015

EN

The paper presents results of numerical analysis of AFM images of a surface of sandblasted Ti6Al7Nb alloys before and after wet etching procedure usually used for preparing commercially viable dental implants. Obtained results demonstrate that etching procedure efficiently cleans the implants as it leaves almost pure Ti-Al-Nb surface with trace amounts of alkali metals and increased hydrophobicity. Apart of that, it turned out that simple statistical measures of the height variations (root mean square roughness) only slightly change upon the treatment procedure, especially for scan lengths below 20 μm. On the other hand, correlation analysis exhibits bifractal surface patterns composed of regular residues left on otherwise helical ridges of the base material. Etching leaves its fingerprint in fractal dimension, but not in the corner frequency.

7

Composition and Microstructure of the Al-Multilayer Graphene Composites Achieved by the Intensive Deformation

52%

Czeppe T., Korznikova E., Ozga P., Wrobel M., Litynska-Dobrzynska L., Korznikova G., Korznikov A., Czaja P., Socha R.

Acta Physica Polonica A

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2014

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vol. 126

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issue 4

921-927

EN

The paper presents results of the studies concerning aluminum-graphene composites produced with use of step technique; first mechanical alloying of Al and graphene powders and later intensive deformation by the high pressure torsion. As a result small, thin and round samples of composites, about 10 mm in diameter were achieved. For comparison similar samples not containing graphene were investigated. The X-ray diffraction, transmission electron microscopy, Raman spectroscopy and X-ray photoelectron spectroscopy were applied to study composites structures and analyze graphene content and atomic bonds. The Raman spectroscopy method suggested multilayer graphene, which could also be identified as the defected nano-graphite as a component of the composite structure as well as some small content of the aluminum carbides. The highly dispersed microstructures of aluminum matrices were identified with the transmission electron microscopy, showing difference between the samples produced with the increased number of rotations, leading to the increased deformation realized. This method revealed carbon and aluminum oxides in large amounts which is interpreted as a surface effect. This method suggested also formation of the carbon-metal and carbon-metal- oxygen atomic bonds, which might partially result from formation of the carbides.

8

The Evolution of Microstructure and Magneto-structural Properties of Heat Treated NI-MN-SN-IN Heusler Alloys Sintered by Vacuum Hot Pressing

52%

Maziarz W., Wojcik A., Chulist R., Szczerba M. J., Kowalczyk M., Czaja P., Cesari E., Dutkiewicz J.

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issue 2

9

Significant Increment of the Dielectric Permittivity and Domain Properties in the (1-x)PbTiO3-x(Na0.5Bi0.5)TiO3 Crystals

51%

Czaja P., Piasecki M., Zapart M. B., Suchanicz J., Konieczny K., Michniowski J., Sitko D., Stachowski G., Kluczewska-Chmielarz K., Czaja P., Piasecki M., Zapart M. B., Suchanicz J., Konieczny K., Michniowski J., Sitko D., Stachowski G., Kluczewska-Chmielarz K.

Archives of Metallurgy and Materials

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2020

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vol. 65

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issue 1

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Electrical and Thermal Properties of Na1–xLixNbO3 (x = 0.08, 0.1 and 0.2) Ceramics Near the Morphotropic Phase Boundary Region

Application of the Autocorrelation Function and Fractal Geometry Methods for Analysis of MFM Images

Effect of Sb and MnO2-Doping on Phase Transitions, Crystal Structure, Thermal, Dielectric, Ferroelectric and Piezoelectric Properties of Na0.5K0.5NbO3 Ceramics

Influence of Fe Addition on the Martensitic Transformation, Structure and Magnetic Properties of Metamagnetic Ni-Co-Mn-Sn Alloys

Structure And Martensitic Transformation in Ni44Mn43.5Sn12.5-xAlx Heusler Alloys

Application of Atomic Force Microscopy for Studies of Fractal and Functional Properties of Biomaterials

Composition and Microstructure of the Al-Multilayer Graphene Composites Achieved by the Intensive Deformation

The Evolution of Microstructure and Magneto-structural Properties of Heat Treated NI-MN-SN-IN Heusler Alloys Sintered by Vacuum Hot Pressing

Significant Increment of the Dielectric Permittivity and Domain Properties in the (1-x)PbTiO3-x(Na0.5Bi0.5)TiO3 Crystals