Structure and mechanical properties of gradient PVD coatings

Dobrzański, L. A.; Żukowska, L. W.; Mikuła, J.; Gołombek, K.; Pakuła, D.; Pancielejko, M.

doi:10.1016/j.jmatprotec.2007.11.283

Cited by 41 publications

(22 citation statements)

References 14 publications

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“…The coating of ceramic materials in PVD processes, including also tool ceramics, is difficult due to dielectric properties, since the inability of the substrate polarization during the coating process makes it difficult to obtain coatings with a good adherence to ceramic substrates. 2,[7][8][9][10][11] The fabrication technology of stratified coatings of the type "adhesive layer/PVD layer" using the multistage surface machining is one of the most modern methods to modify the properties of the surface layer and it consists, in a successive application, of two (or more) technologies of surface engineering. In terms of material effects, we obtain multilayer systems whereof one part is made up of an appropriately selected adhesive layer fabricated on the surface of the substrate, which protects the "proper" PVD layer against a loss of internal cohesion and an insufficient adhesion to the substrate.…”

Section: Introductionmentioning

confidence: 99%

Investigation studies involving wear-resistant ALD/PVD hybrid coatings on sintered tool substrates

Staszuk¹,

Pakuła²,

Tański³

2016

Mater. Tehnol.

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This paper is an important research contribution to the development of PVD coatings, in particular, on ceramic substrates, which, due to their dielectric properties, are difficult materials to coat using this technique. In order to satisfy the desired expectations relating to the PVD coatings, one of the basic properties must be provided for, the adherence to the substrate. The main aim of this research is to investigate the structure and mechanical properties of the coatings deposited in a hybrid process, comprising the atomic-layer deposition (ALD) and cathodic-arc evaporation (CAE-PVD) on sintered carbides and multipoint ceramic cutting tools. The concept of this research study involves an execution and investigation of ALD + PVD hybrid coatings on sintered carbides and a sialon-ceramic substrate, and defining the influence of the ALD interlayer on the adherence of the investigated coatings. The critical load Lc, which is the adhesion measure of coats, was determined with the scratch-test method and a tribological test made with a pin-on-disk tester. Observations of the surface topography and wear mechanism were performed using a scanning electron microscope and atomic-force microscopy. The investigation studies showed that an ALD layer considerably improves the adherence of the PVD layer to the tool-ceramic substrate. The research of the coatings on sintered-carbide substrates showed that the adherence of the PVD coating to the substrate deteriorates in the case of applying an ALD interlayer. Keywords: PVD, ALD, hybrid coatings, tool ceramics, sintered carbideŝ lanek je pomemben raziskovalni prispevek k razvoju PVD nanosov, {e posebno na kerami~ni podlagi, ki je zaradi dielektri~nih lastnosti zahteven material za nana{anje s to tehniko. Da bi zadovoljili pri~akovanja na delu s PVD nanosom, je oprijemljivost na podlago osnovna lastnost, na katero je potrebno biti pozoren. Glavni namen raziskave je preiskati strukturo in mehanske lastnosti nanosa, nane{enega s hibridnim postopkom, ki obsega nanos atomskih plasti (ALD) in katodno izparevanje v obloku (CAE-PVD) na sintrane karbide in ve~to~kovno kerami~no rezilno orodje. Koncept te raziskave vklju~uje izvedbo in preiskavo hibridnega nanosa ALD + PVD na podlago iz sintranih karbidov in sialon keramike ter dolo~itev vpliva vmesne plasti ALD na oprijemljivost preiskovanih nanosov. Kriti~na obremenitev Lc, ki je merilo oprijemljivosti nanosov, je bilo dolo~eno s preizkusom razenja in s tribolo{kim preizkusom trn na plo{~i. S pomo~jo vrsti~nega elektronskega mikroskopa in mikroskopa na atomsko silo je bilo izvedeno opazovanje topografije povr{ine in mehanizma obrabe. Izvedene preiskave ka`ejo, da ALD nanos mo~no izbolj{a oprijemljivost PVD nanosa na orodno keramiko. Pri nanosu na podlago iz sintranega karbida je raziskava pokazala, da je pri uporabi ALD vmesne plasti, oprijemljivost PVD nanosa slab{a.

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Section: Introductionmentioning

confidence: 99%

Investigation studies involving wear-resistant ALD/PVD hybrid coatings on sintered tool substrates

Staszuk¹,

Pakuła²,

Tański³

2016

Mater. Tehnol.

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“…The elements of nickel and cobalt used in the binding phase favor a suitable wetting of carbides, providing stable binding of the grains and and adequate ductility. However the concentration of cobalt cannot be too large, because favor increased abrasive wear [1,2,11]. The application of PVD for the acquisition of gradient coatings of high wear resistance, also in high temperatures, enables to improve the properties of these materials in machining conditions, among others by the reduction of friction factor, increase of microhardness, improvement of tribological contact conditions in the contact area tool-machined item it makes it also possible to protect these materials against adhesive or diffusive wear and against oxidation [3][4][5]7,[10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Structure And Properties Of PVD Coatings Deposited On Cermets

Żukowska

Mikuła

Staszuk

et al. 2015

Archives of Metallurgy and Materials

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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.Keywords: Tool materials, Gradient coating, Cermets, PVD 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 wyso...

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“…Graded coatings are applied in a PVD process by reactive magnetron sputtering (RMS), by Cathodic arc evaporation (CAE), Thermionic arc evaporation (TAE), Reactive ion plating (RIP) methods and by CVD method [44][45][46][49][50][51]. The aspects of this method are detailed in one of the chapters.…”

Section: General Concept Of Sintered Gradient Materialsmentioning

confidence: 99%

Fabrication, Structure, Properties and Application of Gradient Sintered Carbide-Steels with HS6-5-2 Matrix

Dobrzański¹,

Kloc-Ptaszna²

2017

Powder Metallurgy - Fundamentals and Case Studies

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This chapter presents essential information concerning sintered tool materials containing carbides, i.e. high-speed steels and metal matrix composites, including sintered carbides and carbide steels. Gradient materials, whose properties change gradually according to their volume, are characterised. The results of investigations are presented in the final part into the structure and properties of newly developed sintered graded tool materials fabricated by the conventional metallurgy method from a mixture of high-speed HS6-5-2 steel powder and WC carbides. Investigations are described for four-layer materials, where the successive transition layers with a smaller and smaller volume fraction of tungsten carbide were constituted from the surface layer side, until a substrate layer containing high-speed HS6-5-2 steel only. The outcomes are described of structural examinations in a scanning and transmission electron microscope, an X-ray microanalysis and the results of density, porosity and hardness examinations of sintered gradient materials and the results of structure and hardness examinations of heat-treated materials.

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Structure and mechanical properties of gradient PVD coatings

Cited by 41 publications

References 14 publications

Investigation studies involving wear-resistant ALD/PVD hybrid coatings on sintered tool substrates

Investigation studies involving wear-resistant ALD/PVD hybrid coatings on sintered tool substrates

Structure And Properties Of PVD Coatings Deposited On Cermets

Fabrication, Structure, Properties and Application of Gradient Sintered Carbide-Steels with HS6-5-2 Matrix

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