The effect of mechanical activation on the properties of β-sialon precursors

Sopicka-Lizer, Małgorzata; Tańcula, Marta; Włodek, T.; Rodak, K.; Hüller, Marco; Kochnev, V. I.; Фокина, Е. Л.; MacKenzie, Kenneth J.D.

doi:10.1016/j.jeurceramsoc.2007.05.003

Cited by 37 publications

(20 citation statements)

References 22 publications

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“…This result can be explained by increasing the amount of the amorphous phase. As indicated the study of Sopicka-Lizer et al [6] the AlN particles have little resistance to deformation during the milling process. The result supports the reason for the disappearance of the AlN peaks in this study, as seen in the XRD analysis, by increasing the milling time.…”

Section: Milling and Powder Characterizationmentioning

confidence: 80%

“…Zalite and co-workers [2] obtained fully dense ceramics from plasma-chemical synthesized SiAlON nano powders at relatively low temperatures (1500-1600 8C) with good mechanical properties. Although this method promises very low particle sizes ($40 nm) it would increase the cost of the initial powder [6]. Xu et al [5] show that particle size of SiAlON starting powders could be decreased to nano-size by using a high-energy mechanical milling process which includes dry milling.…”

Section: Introductionmentioning

confidence: 99%

“…Xu et al [5] show that particle size of SiAlON starting powders could be decreased to nano-size by using a high-energy mechanical milling process which includes dry milling. However, such dry milling systems lead to the wearing of milling equipment and contaminants in the milled powder [6].…”

Section: Introductionmentioning

confidence: 99%

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The effect of the wet-milling process on sintering temperature and the amount of additive of SiAlON ceramics

Eser

Kurama

2010

Ceramics International

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Section: Milling and Powder Characterizationmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%

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The effect of the wet-milling process on sintering temperature and the amount of additive of SiAlON ceramics

Eser

Kurama

2010

Ceramics International

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“…The use of tool ceramics as compared to sintered carbides is still considerably small but it is growing, also due to the application of thin wear-resistant layers PVD and CVD. 1,2 Surface engineering technologies play a significant role in material engineering and are viewed as the fundamental scope of knowledge in this field of engineering. The research entities working in this field try to investigate and identify the phenomena taking place on the surfaces of the machined materials.…”

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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“…Mechanochemically processed silicon nitride powders have high densification and compaction at relatively low temperatures [10][11]. However, the microstructure of silicon nitride sintered at low temperatures differs from the one produced by hot-pressing, because the grain growth is substantially suppressed in the former.…”

Section: Introductionmentioning

confidence: 99%

Preparation of Fine-Grained Silicon-Nitride Ceramics and their Characterization by Depth-Sensing Indentation Tests

et al. 2015

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Both pressureless-sintered and dense, fine-grained silicon nitride ceramics were produced from mechanochemically activated nitride-based precursors. Scanning Electron Microscopy (SEM), Transmition Electron Microscopy (TEM), X-Ray Diffraction (XRD) and an ultra-low load microhardness tester were used to characterize these ceramics. Depth-sensing indentation (DSI) tests in the range of 200-1800 mN were performed on the silicon nitride ceramic to determine dynamic hardness (H d ) and reduced elastic modulus (Er) values. These values were deduced by analyzing the unloading segments of the DSI curves. It was found that both H d and Er exhibits a significant indentation load dependence. Nix-Gao (NG) model was used to analyze the dynamic hardness data in the calculation of the load independent hardness value.

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The effect of mechanical activation on the properties of β-sialon precursors

Cited by 37 publications

References 22 publications

The effect of the wet-milling process on sintering temperature and the amount of additive of SiAlON ceramics

The effect of the wet-milling process on sintering temperature and the amount of additive of SiAlON ceramics

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

Preparation of Fine-Grained Silicon-Nitride Ceramics and their Characterization by Depth-Sensing Indentation Tests

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