Effects of Composition on Mechanical and ED-machining Characteristics of Zirconia toughened Alumina – Titanium Carbide (ZTA-TiC) Composite Ceramics

Schmitt-Radloff, Ulrich; Gommeringer, Andrea; Assmuth, Patrick; Kern, Frank; Klocke, Fritz; Holsten, Maximilian; Schneider, Sebastian

doi:10.1016/j.procir.2017.12.015

Cited by 8 publications

(4 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…ZTA-TiN materials with 10 vol% zirconia reinforcement and 28 vol% titanium nitride as conductive phase show attractive mechanical properties comparable to ZTA-TiC and ZTA-NbC materials studied previously [8,19]. Moreover, a far superior machining speed compared to these materials was observed.…”

Section: Discussionsupporting

confidence: 53%

Mechanical Properties and Electrical Discharge Machinability of Alumina-10 vol% Zirconia-28 vol% Titanium Nitride Composites

Gommeringer

Kern

2020

Ceramics

Self Cite

View full text Add to dashboard Cite

Electrical discharge machinable ceramics provide an alternative machining route independent on the material hardness which enables manufacturing of customized ceramic components. In this study a composite material based on an alumina/zirconia matrix and an electrically conductive titanium nitride dispersion was manufactured by hot pressing and characterized with respect to microstructure, mechanical properties and ED-machinability by die sinking. The composites show a combination of high strength of 700 MPa, hardness of 17–18 GPa and moderate fracture resistance of 4.5–5 MPa√m. With 40 kS/m the electrical conductivity is sufficiently high to ensure ED-machinability.

show abstract

Section: Discussionsupporting

confidence: 53%

Mechanical Properties and Electrical Discharge Machinability of Alumina-10 vol% Zirconia-28 vol% Titanium Nitride Composites

Gommeringer

Kern

2020

Ceramics

Self Cite

View full text Add to dashboard Cite

show abstract

“…Thermal spray coatings of YSZ are often spongy, owing to their use as a thermal barrier coating, with a low hardness up to 800 HV and a Young's modulus no greater than 95 GPa [21,22]. Due to the good process capability and promising mechanical properties, further experiments could reduce the TiC addition in the target material, because the electrical conductivity of oxide-based EDM ceramics rises with a volume fraction of 20 TiC from a few thousand S/m to over 20 kS/m with 28 vol.-% TiC, as reported for ZTA [6].…”

Section: Discussionmentioning

confidence: 87%

“…Instead of changing hardware, this study shows an approach to solving the DAE problem originating from studies of electrical discharge machinable (EDM) ceramics. By alloying oxide ceramics with a percolating electrically conductive dispersion (such as a transition metal carbides), it is possible to obtain an overall electrically conductive ceramic compound [3][4][5][6][7]. In this study, we tried to use this knowledge in a magnetron sputter process: high-power impulse magnetron sputtering (HiPIMS).…”

Section: Introductionmentioning

confidence: 99%

Deposition of 3YSZ-TiC PVD Coatings with High-Power Impulse Magnetron Sputtering (HiPIMS)

Gaedike¹,

Guth

Kern

et al. 2021

Applied Sciences

Self Cite

View full text Add to dashboard Cite

Optimized coating adhesion and strength are the advantages of high-power impulse magnetron sputtering (HiPIMS) as an innovative physical vapor deposition (PVD) process. When depositing electrically non-conductive oxide ceramics as coatings with HiPIMS without dual magnetron sputtering (DMS) or mid-frequency (MF) sputtering, the growing coating leads to increasing electrical insulation of the anode. As a consequence, short circuits occur, and the process breaks down. This phenomenon is also known as the disappearing anode effect. In this study, a new approach involving adding electrically conductive carbide ceramics was tried to prevent the electrical insulation of the anode and thereby guarantee process stability. Yttria-stabilized zirconia (3YSZ) with 30 vol.% titanium carbide (TiC) targets are used in a non-reactive HiPIMS process. The main focus of this study is a parameter inquisition. Different HiPIMS parameters and their impact on the measured current at the substrate table are analyzed. This study shows the successful use of electrically conductive carbide ceramics in a non-conductive oxide as the target material. In addition, we discuss the observed high table currents with a low inert gas mix, where the process was not expected to be stable.

show abstract

“…They have, however, remained niche-products for special applications. Recently, materials with an alumina-zirconia matrix and titanium or niobium carbide dispersions were reported [26,27].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Mechanical Properties in ED-Machinable Zirconia-Tungsten Carbide Composites with Yttria-Neodymia Co-Stabilized Zirconia Matrix

2018

Self Cite

View full text Add to dashboard Cite

The electrical discharge machining-process (EDM) is a smart solution to optimize the manufacturing chain of customized and complex shaped ceramic components. To comply with the high requirements for the machine and mold design, it is necessary to improve the mechanical properties of ED-machinable ceramics. In this study, ceramic composites with a tetragonal zirconia matrix and tungsten carbide as electrically conductive dispersion were investigated. To improve the toughness of this high strength material, co-stabilized zirconia coated with yttria and neodymia as dopants were used in the compositions with 1.5/1.5 and 1.75/1.25 mol %. These recipes were compared to commercial 3Y-TZP as a reference matrix material combined with the same WC raw powder. The electrically conductive phase content was varied from 20 to 28 vol %. For all compositions, the ceramic blanks were hot pressed at identical dwell and pressure, but with various sintering temperatures (1300 °C to 1450 °C) and then tested with respect to the mechanical and electrical properties. By variation of the stabilizer system, a significantly higher toughness of up to 11.3 MPa√m compared to 5.3 MPa√m for 3Y-TZP-20WC is achieved while the bending strength stays at a comparable high level of >1500 MPa.

show abstract

Effects of Composition on Mechanical and ED-machining Characteristics of Zirconia toughened Alumina – Titanium Carbide (ZTA-TiC) Composite Ceramics

Cited by 8 publications

References 8 publications

Mechanical Properties and Electrical Discharge Machinability of Alumina-10 vol% Zirconia-28 vol% Titanium Nitride Composites

Mechanical Properties and Electrical Discharge Machinability of Alumina-10 vol% Zirconia-28 vol% Titanium Nitride Composites

Deposition of 3YSZ-TiC PVD Coatings with High-Power Impulse Magnetron Sputtering (HiPIMS)

Enhanced Mechanical Properties in ED-Machinable Zirconia-Tungsten Carbide Composites with Yttria-Neodymia Co-Stabilized Zirconia Matrix

Contact Info

Product

Resources

About