Tool ceramics based on Al2O3–ZrO2–TiCN composite

2011 ◽  
Vol 49 (11-12) ◽  
pp. 675-681 ◽  
Author(s):  
Ya. G. Dyatlova ◽  
S. V. Agafonov ◽  
S. Yu. Boikov ◽  
S. S. Ordanyan ◽  
V. I. Rumyantsev
Keyword(s):  
Tool Ceramics

Cutting Properties of PVD and CVD Coated A2lO 3 + TiC Tool Ceramic

2007 ◽  
Vol 539-543 ◽  
pp. 1159-1164
Author(s):  
Mirko Sokovic ◽  
Leszek Adam Dobrzański ◽  
Janez Kopač ◽  
Ladislav Kosec
Keyword(s):  
Wear Resistance ◽  
Cast Iron ◽  
Micro Hardness ◽  
Wear Resistant Coatings ◽  
Hardness Tester ◽  
Hardness Tests ◽  
Cutting Inserts ◽  
Grey Cast ◽  
Tool Ceramics ◽  
Substrate Hardness

The paper presents investigation results of tribological and cutting properties of the coatings deposited with the PVD and CVD techniques on cutting inserts made from the Al2O3 + TiC tool ceramics. Tests were carried out on the inserts made from ceramics, uncoated and PVD or CVD-coated with gradient, mono-, multilayer and multicomponent hard wear resistant coatings composed of TiN, TiCN, TiAlN, TiAlSiN and Al2O3 layers. Substrate hardness tests and micro hardness tests of the deposited coatings were made on the ultra-micro-hardness tester. It was demonstrated, basing on the technological cutting tests of grey cast iron (260 HB), that putting down onto the tool ceramics the thin anti-wear PVD and CVD coatings increases their abrasion wear resistance, which has a direct effect on extending tool life of the cutting edge.

Crack Profile under Vickers Indents

2009 ◽  
Vol 409 ◽  
pp. 295-299
Author(s):  
Zdenĕk Jonšta ◽  
Lucie Olejníčková ◽  
Karel Mazanec
Keyword(s):  
Crack Formation ◽  
Cutting Tool ◽  
Ceramic Materials ◽  
Evaluation Methods ◽  
Technical Application ◽  
Lateral Crack ◽  
Complex Evaluation ◽  
Tool Ceramics ◽  
Physical Engineering ◽  
Crack Profile

The present work is focused on complex evaluation of crack profiles, created around Vickers indents in two types of cutting tool ceramics, namely in the Al2O3 + ZrO2 ceramics and -Si3N4. The geometry of Vickers indents is investigated using two different evaluation methods. The first one is based on the application of serial sectioning from the indented specimen surface. The second method consists in the layer removing from plane perpendicular to the indented surface. These evaluation methods are convenient for determine the shape of created cracks and profiles of deformed area developed around the investigated indents. The mentioned methods contribute to the understanding of physical engineering principles resulting from the radial/median and lateral crack formation as the important characteristics influencing the reliable technical application of investigated ceramic materials.

Structure and Properties of the Wear Resistant Coatings Obtained in the PVD and CVD Processes on Tool Ceramics

2006 ◽  
Vol 513 ◽  
pp. 119-134 ◽  
Author(s):  
Leszek Adam Dobrzański ◽  
Daniel Pakuła
Keyword(s):  
Functional Properties ◽  
Scratch Test ◽  
Abrasive Resistance ◽  
Wear Resistant ◽  
Wear Resistant Coatings ◽  
Nitride Ceramics ◽  
Pin On Disc ◽  
Grey Cast ◽  
Electron Microscopes ◽  
Tool Ceramics

The paper presents investigation results of structure and functional properties of the hard wear resistant coatings obtained in the PVD and CVD processes on the Si3N4 nitride tool ceramics. Examinations of coatings structures were made using the transmission (TEM) and scanning (SEM) electron microscopes, microhardness tests, coating adhesion to the substrate with the „scratch test”, and the coatings abrasive resistance „pin-on-disc” test. Machining tests results and roughness tests results for the machined grey cast iron surface are also presented. The research carried out proved that depositing the hard, anti wear, multilayer coatings based on the Al2O3 and TiN layers onto the Si3N4 nitride tool ceramics with the PVD method results in obtaining better functional properties like extension of the cutting tool life, than in case of the uncoated nitride ceramics or coated with the PVD coatings and some CVD ones.

scholarly journals Experimental Analysis of Residual Stress in Multi-Component Coatings Deposited by PVD Method on Oxide Tool Ceramics

2020 ◽  
Vol 138 (2) ◽  
pp. 320-323
Author(s):  
R. Dziwis ◽  
W. Kwaśny ◽  
A. Śliwa ◽  
J. Mikuła ◽  
B. Ziębowicz ◽  
...  
Keyword(s):  
Residual Stress ◽  
Experimental Analysis ◽  
Tool Ceramics

Tribological properties of the PVD and CVD coatings deposited onto the nitride tool ceramics

2006 ◽  
Vol 175 (1-3) ◽  
pp. 179-185 ◽  
Author(s):  
L.A. Dobrzański ◽  
D. Pakuła ◽  
A. Křiž ◽  
M. Soković ◽  
J. Kopač
Keyword(s):  
Tribological Properties ◽  
Tool Ceramics

Titanium Carbide Reinforced Composite Tool Ceramics Based on Alumina

2010 ◽  
Vol 65 ◽  
pp. 50-55
Author(s):  
Magdalena Szutkowska ◽  
Barbara Smuk ◽  
Marek Boniecki
Keyword(s):  
Fracture Toughness ◽  
Wear Resistance ◽  
Titanium Carbide ◽  
High Hardness ◽  
Ceramic Composites ◽  
Critical Stress Intensity Factor ◽  
Pure Alumina ◽  
Reinforced Composite ◽  
Composite Tool ◽  
Tool Ceramics

The present study reports some preliminary results obtained by reinforcing Al2O3-10 wt% ZrO2 (partially stabilized with Y2O3 -Y5 and monoclinic phase m-ZrO2) composite with TiC phase in amount of 5 wt %. Ceramic composites were prepared on the basis submicro and nano scale trade powders. Apparent density, porosity, Vicker’s hardness, Young’s modulus and fracture toughness (KIC) were determined. Wear resistance (Vn) very important property for tool ceramics was specified by the speed of mass lost. Scanning electron microscopy (SEM) to observation of the fracture surface microstructure was used. The titanium carbide reinforced composite tool ceramics based on alumina exhibit high hardness, fracture toughness (critical stress intensity factor KIC increase up to 5,2 MPa m1/2), high elastic moduli and higher wear resistance in related to pure alumina. Cutting tests confirm the high performance of these ceramic composites.

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