A5061697768- Advanced materials and composites
- Advanced ceramic materials synthesis
- Powder Metallurgy Techniques and Materials
- Injection Molding Process and Properties
- Orthopaedic implants and arthroplasty
- Metal and Thin Film Mechanics
- Rheology and Fluid Dynamics Studies
- Intermetallics and Advanced Alloy Properties
- Diamond and Carbon-based Materials Research
- Granular flow and fluidized beds
- Fluid Dynamics and Heat Transfer
- Materials Engineering and Processing
- Tunneling and Rock Mechanics
- Metal Alloys Wear and Properties
- High Entropy Alloys Studies
- Particle Dynamics in Fluid Flows
- Aluminum Alloys Composites Properties
- High-Temperature Coating Behaviors
- Semiconductor materials and devices
Ceratizit (Luxembourg)
2016-2025
TU Wien
2014
WC-Co cemented carbides alloyed with Ru are relevant for the hardmetal industry in spite of their high cost. These alloys used applications requiring very demanding thermal properties and good performance aggressive abrasive media. For some applications, it is difficult to find an alternative material that could offer a similar performance. containing binders (based on Co, Ni, CoNi CoNiCr) analyzed this work considering carbon contents covering whole window, using equivalent WC-binder...
The present investigation addresses the mechanical properties, wear behaviour, and high-temperature oxidation of cermets hardmetals based on either Ti(C,N) or WC a metal binder Fe15Ni Fe15Ni10Cr. This study also includes commercial-grade WC-Co for comparative purposes. production these materials involved powder metallurgy sinter-HIP processing route under identical conditions. It is found that WC-based have superior including hardness, fracture toughness, transversal rupture strength (TRS),...
Uniaxial die pressing is a commonly used shaping technique in powder metallurgy. The initial step within the compression cycle filling process of cavity with granular materials. Here, goal to have reproducible manufacture compressed parts consistent quality. Besides effects linked geometry and mechanisms filling, flowability material plays major role. Therefore, deeper understanding flow behaviour centre present study. In order assess flowability, two different experimental methods are used....
We present a comparative study on determining the critical binder volume concentration (CBVC) of hard metal paste using following techniques: theoretical calculation, density method, oil titration, and Reddy's model. The calculations involve measurements to discern carbide powder-free volume. titration methods consist stepwise increase organic content while mixer torque is recorded. In contrast, model requires preparation several feedstocks at varying solid loadings, which are tested in...
The influence of sintering temperature, dwelling time at maximum temperature and carbon content on the microstructure mechanical magnetic properties WC-6%Co hardmetal was investigated. Samples were sintered according to a central composite design subsequently analysed with respect microstructural parameters (average WC grain size, binder mean free path contiguity), as well (hardness, transverse rupture strength toughness) (magnetic saturation coercivity) properties. Microstructural...
Alternative hard materials to traditional WC-Co are one of the main goals in investigation efforts both scientific and industrial communities. In this investigation, WC-based were designed processed with different Fe alloys employing a powder metallurgy route. Two candidates selected: FeCrAl FeNiCr. The former showed formation aluminium oxides, which hindered homogeneous metal-ceramic distribution. On other hand, FeNiCr led dense optimised samples further characterised terms their mechanical...
This study shows the results of mechanical properties (hardness, toughness, TRS), oxidation behavior against high temperature and wear resistance composite materials based on a ceramic phase –Ti(C,N) or WC– metal binder (Fe15Ni10Cr). These hard metals were produced through powder metallurgy process that included milling, uniaxial pressing, sinter-HIP. Standardized cylindrical specimens used for TRS tests, tests conducted broken in static air at temperatures up to 1000 ºC. Wear was analyzed...
The mass flow of granular matter through orifices can be described by the well-known Beverloo law. It depends on particle and orifice sizes, interparticle particle/container interaction forces, particles’ surfaces - to name a few influences rate. We present an experimental study set ready-to-press (RTP) hard metal powders varying diameter. obtained parameters law are compared with angle repose measurements. interplay between attractive forces gravitational discussed for both types...
The fundamental reason for analysing the microstructure of a material is to achieve higher degree understanding microstructural mechanisms governing its mechanical properties and use this knowledge as tool further developments. In study, Ti(C,N)-based cermets were sinter-HIP’ed at different temperatures, samples measured obtained microstructures analysed by light optical electron microscopy. A tailored python-based image processing was developed combine analyse EBSD BSE. goal study determine...