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1
Content available remote Fractal and multifractal characteristics of the PVD and CVD coatings deposited onto compound tool ceramics
Kwaśny W., Mikuła J.
Archives of Materials Science and Engineering
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2012
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Vol. 56, nr 1
37-44
EN
Purpose: The goal of this work is the fractal and multifractal characteristics of the TiN and TiN+multiTiAlSiN+TiN coatings obtained in the PVD process, and of the TiN+Al2O3 coating obtained in the CVD process on the Al2O3+TiC oxide tool ceramics substrate. Design/methodology/approach: The investigations were carried out of the multi-edge inserts from the Al2O3+TiC oxide tool ceramics uncoated and coated with the TiN and TiN+multiTiAlSiN+TiN coatings deposited in the cathode arc evaporation CAE PVD process, as well as with the TiN+Al2O3 coating obtained in the CVD process. Determining the fractal dimension and the multifractal analysis of the examined coatings were made basing on measurements obtained from the AFM microscope, using the projective covering method. Findings: Investigations carried out confirm that the fractal dimension and parameters describing the multifractal spectrum shape may be used for characterizing and comparing surfaces of coatings obtained in the PVD and CVD processes and of the substrate material from the Al2O3+TiC. Research limitations/implications: Investigation or relationship between parameters describing the multifractal spectrum and physical properties of the examined materials calls for further analyses. Originality/value: Investigations carried out confirm that the fractal dimension and parameters describing the multifractal spectrum shape may be used for characterizing and comparing surfaces of coatings obtained in the PVD and CVD processes.
2
Content available Structure, physical properties and fractal character of surface topography of CVD coatings
Kwaśny W.
Journal of Machine Engineering
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2011
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Vol. 11, No. 1-2
134--151
EN
The aim of the presented study is to establish a methodology elaboration, giving a possibility to predict properties of coatings reached in CVD process on tool materials, based on fractal quantities describing their surface. Coatings' topography and its structure which has an impact on a shape of analysed objects' surface were characterised in a comprehensive way. Influence of a type of process and conditions of deposition over structure and shape of topography as well as mechanical and operational properties of the acquired coatings were determined.
3
Content available remote Modelling of properties of the PVD coatings using neural networks
Kwaśny W., Sitek W., Dobrzański L. A.
Journal of Achievements in Materials and Manufacturing Engineering
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2007
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Vol. 24, nr 2
163-166
EN
Purpose: The goal of this work is to develop the neural network model for prediction of properties Ti+TiN, Ti+Ti(C,N) and Ti+TiC coatings obtained in the PVD process. Design/methodology/approach: Neural network models were developed based on the experimental results multifractal analysis of the examined coatings were made basing on measurements obtained from the AFM microscope, using the projective covering method. Findings: Investigations carried out confirm that the fractal dimension and parameters describing the multifractal spectrum shape may be used for prediction of coatings obtained in the PVD processes. Research limitations/implications: Investigation or relationship between parameters describing the multifractal spectrum and physical properties of the examined materials calls for further analyses. Originality/value: The presented in the paper research results indicate that neural networks can be applied for modeling the properties of PVD coatings on the base of multifractal parameters.
4
Content available remote Fractal and multifractal characteristics of PVD coatings
Kwaśny W., Dobrzański L. A., Król M., Mikuła J.
Journal of Achievements in Materials and Manufacturing Engineering
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2007
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Vol. 24, nr 2
159-162
EN
Purpose: The goal of this work is the fractal and multifractal characteristics and tribological properties of the TiN and TiN+multiTiAlSiN+TiN coatings obtained by cathodic arc evaporation PVD process on the multi-edge plates made from the Al203 + SiC(w) oxide tool ceramics. Design/methodology/approach: The results of the chemical and phase composition researches, tests of mechanical properties, including thickness, microhardness and roughness were evaluated. The characterized structure and surface topography of analyzed coatings, presenting fractal and multifractal character, was confirmed. To estimate the fractal dimension and multifractal spectra, measurements obtained from atomic force microscope (AMF) images, projective covering method (PCM) was used. Findings: The researches were carried out to confirm that the fractal dimension and parameters, describing the multifractal spectrum shape, may be used for characterizing and comparing coating surface obtained by cathodic arc evaporation PVD process and of the substrate material made from Al203 + SiC(w) oxide tool ceramics. Research limitations/implications: Relationship between parameters describing the multifractal spectrum and physical properties of the examined materials calls for further work. Originality/value: Fractal and multifractal analysis gives possibility to characterise in the quantitative way the extent of irregularities of the analysed surface.
5
Content available remote Fractal and multifractal characteristics of CVD coatings deposited onto the nitride tool ceramics
Kwaśny W., Pakuła D., Woźniak M., Dobrzański L. A.
Journal of Achievements in Materials and Manufacturing Engineering
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2007
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Vol. 20, nr 1-2
371-374
EN
Purpose: The goal of this work is the fractal and multifractal characteristics of the TiN+Al2O3 and Al2O3+TiN coatings obtained in the CVD process on the Si3N4 tool ceramics substrate. Design/methodology/approach: The investigations were carried out of the multi-edge inserts from the Si3N4 nitride tool ceramics uncoated and coated with the TiN+Al2O3 and Al2O3+TiN coatings deposited in the CVD process. Determining the fractal dimension and the multifractal analysis of the examined coatings were made basing on measurements obtained from the AFM microscope, using the projective covering method. Findings: Investigations carried out confirm that the fractal dimension and parameters describing the multifractal spectrum shape may be used for characterizing and comparing surfaces of coatings obtained in the CVD processes and of the substrate material from the Si3N4 nitride tool ceramics. Research limitations/implications: Investigation or relationship between parameters describing the multifractal spectrum and physical properties of the examined materials calls for further analyses. Originality/value: Employment of multifractal geometry in materials engineering provides the opportunity to work out more complete, also quantitative, characteristics of properties of the investigated objects. Multifractal analysis makes it possible to characterise in the quantitative way the extent of irregularities of the analysed surface.
6
Content available remote Fractal and multifractal characteristics of coatings deposited on pure oxide ceramics
Kwaśny W., Mikuła J., Dobrzański L. A.
Journal of Achievements in Materials and Manufacturing Engineering
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2006
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Vol. 17, nr 1-2
257--260
EN
Purpose: The goal of this work is the fractal and multifractal characteristics of the TiN and TiN+multiTiAlSiN+TiN coatings obtained in the PVD process, and of the TiN+Al2O3 coating obtained in the CVD process on the Al2O3+ZrO2 oxide tool ceramics substrate. Design/methodology/approach: The investigations were carried out of the multi-edge inserts from the Al2O3+ ZrO2 oxide tool ceramics uncoated and coated with the TiN and TiN+multiTiAlSiN+TiN coatings deposited in the cathode arc evaporation CAE PVD process, as well as with the TiN+Al2O3 coating obtained in the CVD process. Determining the fractal dimension and the multifractal analysis of the examined coatings were made basing on measurements obtained from the AFM microscope, using the projective covering method. Findings: Investigations carried out confirm that the fractal dimension and parameters describing the multifractal spectrum shape may be used for characterizing and comparing surfaces of coatings obtained in the PVD and CVD processes and of the substrate material from the Al2O3+ZrO2 oxide tool ceramics. Research limitations/implications: Investigation or relationship between parameters describing the multifractal spectrum and physical properties of the examined materials calls for further analyses. Originality/value: Investigations carried out confirm that the fractal dimension and parameters describing the multifractal spectrum shape may be used for characterizing and comparing surfaces of coatings obtained in the PVD and CVD processes.
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