Wyniki wyszukiwania - Biblioteka Nauki

1

Gradient PVD coatings deposited on the sintered tool materials

100%

Dobrzański L. , Żukowska L.

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2011

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tom Vol. 48, nr 2

103-111

EN

The paper presents investigation results of properties of the sintered tool materials: cemented carbides, cermets and Al2O3 type oxide tool ceramics with gradient (Ti,Al)N and Ti(C,N) coatings deposited with the cathodic arc evaporation CAE-PVD method.

2

Structure And Properties Of PVD Coatings Deposited On Cermets

80%

Żukowska L. , Mikuła J. , Staszuk M. , Musztyfaga-Staszuk M.

Archives of Metallurgy and Materials

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2015

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tom Vol. 60, iss. 2A

727--733

EN

The main aim of the research is the investigation of the structure and properties of single-layer and gradient coatings of the type (Ti,Al)N and Ti(C,N) deposited by physical vapour deposition technology (PVD) on the cermets substrate. The structural investigations include the metallographic analysis on the transmission and scanning electron microscope. Examinations of the chemical compositions of the deposited coatings were carried out using the X-ray energy dispersive spectrograph EDS, and using the X-ray diffractometer. The investigations include also analysis of the mechanical and functional properties of the materials: substrate hardness tests and microhardness tests of the deposited coatings, surface roughness tests, evaluation of the adhesion of the deposited coatings as well as cutting properties. The results of the investigations carried out confirm the advantages of PVD coatings deposited onto cermets substrate especially in case of (Ti,Al)N. Coatings deposited onto the investigated substrates are characterised by good adhesion, high microhardness, taking effect in very high increasing of wear resistance. Deposition of hard, thin, gradient coatings on materials surface by PVD method features one of the most intensely developed directions of improvement of the working properties of materials. Equally important is the development of tool materials with respect to the fabrication of thin coatings resistant to wear in PVD process. It is of considerable importance, since through the selection of appropriate components, we can obtain a tool material of better properties. This area of tool material development is a priority nowadays, since it is the main route leading to the acquisition of machining tools of suitable properties. The results of the investigation provide useful information on microstructure, adhesion characterized in a scratch test, wear resistant properties of the gradient and single-layer coatings deposited onto cermet.

PL

Celem artykułu było zbadanie struktury i właściwości jednowarstwowych i gradientowych powłok typu (Ti,Al)N oraz Ti(C,N) naniesionych metodą fizycznego osadzania z fazy gazowej (PVD) na podłożu z cermetali narzędziowych. Badania strukturalne obejmują transmisyjną i skaningową mikroskopię elektronową. Analizę składu chemicznego i fazowego badanych powłok wykonano metodą spektroskopii energii rozproszonego promieniowania rentgenowskiego (EDS) oraz metodą dyfrakcji rentgenowskiej za pomocą dyfraktometru rentgenowskiego. Badania obejmują również analizę właściwości mechanicznych i funkcjonalnych badanych materiałów: badanie twardości podłoża z cermetalu i testy mikrotwardości naniesionych powłok, badania chropowatości powierzchni, ocena przyczepności naniesionych powłok, jak również właściwości skrawne. Wyniki przeprowadzonych badań potwierdzają zalety powłok PVD osadzanych na podłożu z cermetalu, zwłaszcza w przypadku powłok typu (Ti,Al)N. Powłoki osadzone na badanych podłożach charakteryzują się dobrą przyczepnością, wykazują wysoką mikrotwardość, co wpływa na wzrost odporności ściernej. Istoty jest rozwój materiałów narzędziowych w zakresie wytwarzania cienkich powłok odpornych na zużycie w procesie PVD. Ma to duże znaczenie, ponieważ wykorzystując cechy odpowiednio dobranych składników można uzyskać materiał narzędziowy o lepszych własnościach. Ta dziedzina rozwoju materiałów narzędziowych stanowi w obecnych czasach priorytet, ponieważ jest główną drogą, wiodącą do uzyskania narzędzi skrawających o odpowiednich własnościach. Wyniki przeprowadzonych badań dostarczają przydatnych informacji na temat mikrostruktury oraz adhezji, odpornych na zużycie gradientowych i jednowarstwowych powłok naniesionych na podłoże z cermetalu.

3

Hard gradient (Ti,Al,Si)N coating deposited on composite tool materials

70%

Dobrzański L. A. , Żukowska L. , Mikuła J. , Gołombek K. , Gawarecki T.

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2009

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tom Vol. 36, nr 2

69-75

EN

Purpose: This paper presents investigation of gradient coating of (Ti,Al,Si)N deposited on the Al2O3+SiC(w) oxide ceramics substrate deposited with the PVD process. Design/methodology/approach: Structure of substrate and coating was investigated with use of scanning electron microscopy (SEM); The X-Ray Photoelectron Spectrometry (XPS) and Auger Electron Spectrometry (AES) examinations was carried out for proving the gradient character of the (Ti,Al,Si)N coating. The investigation includes also microhardness and roughness tests of the deposited coating and used substrate. Scratch test results was analysed to introduce adherence of the investigated coating. Findings: Gradient structure and main properties of the investigated materials were introduced. It has been stated, that properties of the coated with gradient (Ti,Al,Si)N coating oxide tool ceramic increase in comparison with uncoated material. Practical implications: Depositing the wear resistant gradient coating onto the Al2O3+SiC(w) oxide tool ceramic results in a significant increase of the surface layer microhardness, contributing most probably in this way in machining to the decrease of the wear intensity of cutting tools’ flanks made from the Al2O3+SiC(w) oxide tool ceramic. Originality/value: Gradient coatings are an innovative idea. The composition, microstructure and properties of gradient materials change continuously from the surface to the interior of the material.

4

Ti(C,N) and (Ti,Al)N hard wear resistant coatings

70%

Dobrzański L. A. , Żukowska L. , Kwaśny W. , Mikuła J. , Gołombek K.

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tom Vol. 42, nr 2

93-103

EN

Purpose: Investigation the influence of kind of PVD coatings structure (homogenous or gradient) on properties of deposited tool materials: cemented carbides and cermets. Design/methodology/approach: Analysis of the structure, analysis of the mechanical and functional properties: surface roughness, microhardness tests, scratch tests, cutting tests. The Ti(C,N) gradient coating was investigated by XPS method with multifunctional PHI 5700/660 spectrometer. The characteristic of surface region coating were determined from XPS depth profile. X-ray qualitative phase analysis and the grazing incidence X-ray diffraction method (GIXRD) was employed to collect the detailed information about phase composition of investigated material’s surface layer. Microstructural of investigations substrates and coatings by transmission electron miocroscopy (TEM) were done. Findings: Results of the investigation the influence of PVD coatings structure (homogenous or gradient) and kind on properties of coated tool materials: cemented carbides and cermets are given in the paper. Coatings are characterized by dense, compact structure, there have been identified no pores, fractures and discontinuities. The coatings were deposited uniformly onto the investigated substrate materials and show a characteristic columnar, fine-graded structure. The results of roughness, microhardness and cutting tests confirm the advantages of the PVD coatings. The coatings deposited onto the investigated substrates are characterised by good adhesion and causes increasing of wear resistance. The grazing incidence X-ray diffraction method (GIXRD) in the investigated coatings were used to describe the structure and gradient character of the coatings. Practical implications: Deposition of hard, thin, gradient coatings on materials surface by PVD method features one of the most intensely developed directions of improvement of the working properties of materials. Originality/value: New techniques of gradient coatings deposition is one of the most spectacular aspect of the materials engineering development in the last years. The grazing incidence X-ray diffraction method (GIXRD) in the investigated coatings were used to describe the gradient character of the coatings.