A5066780530- Advanced ceramic materials synthesis
- MXene and MAX Phase Materials
- Aluminum Alloys Composites Properties
- Nuclear Materials and Properties
- Nuclear reactor physics and engineering
- High-Temperature Coating Behaviors
- Fusion materials and technologies
- Nuclear materials and radiation effects
- Electronic Packaging and Soldering Technologies
- Thermodynamic and Structural Properties of Metals and Alloys
- Metal and Thin Film Mechanics
- Recycling and utilization of industrial and municipal waste in materials production
- Material Properties and Applications
- Glass properties and applications
- Intermetallics and Advanced Alloy Properties
- 2D Materials and Applications
- Advanced materials and composites
- Molten salt chemistry and electrochemical processes
- Boron and Carbon Nanomaterials Research
- Ferroelectric and Negative Capacitance Devices
- Hydrogen embrittlement and corrosion behaviors in metals
- Metallurgical and Alloy Processes
- Copper Interconnects and Reliability
- Tribology and Wear Analysis
- Ion-surface interactions and analysis
University of Huddersfield
2019-2024
Belgian Nuclear Research Centre
2013-2022
KU Leuven
1996-2017
IMEC
2007-2011
Imec the Netherlands
2007
This study reports on the synthesis and characterization of MAX phases in (Zr,Ti)n+1AlCn system. The were synthesized by reactive hot pressing pressureless sintering 1350-1700 °C temperature range. produced ceramics contained large fractions 211 312 (n = 1, 2) phases, while strong evidence a 413 3) stacking was found. Moreover, (Zr,Ti)C, ZrAl2, ZrAl3, Zr2Al3 present as secondary phases. In general, lattice parameters hexagonal followed Vegard's law over complete Zr-Ti solid solution range,...
Guided by predictive theory, a new compound with chemical composition (Cr2/3Zr1/3)2AlC was synthesized hot pressing of Cr, ZrH2, Al, and C mixtures at 1300 °C. The crystal structure is monoclinic space group C2/ c displays in-plane order in the metal layers, so-called i-MAX phase. Quantitative analyses confirmed that primary phase had stoichiometry, secondary Cr2AlC, AlZrC2, ZrC phases small amount Al-Cr intermetallics. A theoretical evaluation magnetic performed, indicating an...
For the first time, MAX phases in Hf-Al-C system were experimentally synthesized using reactive hot pressing. HfC was observed as main competing phase. The lattice parameters of Hf2AlC and Hf3AlC2 determined by Rietveld refinement based on X-ray diffraction data. atomic stacking sequence revealed high-resolution scanning transmission electron microscopy. Mixtures 211 312 within same grain, including 523 layers. This transition structure is discussed.
The solubility of zirconium (Zr) in the Nb4AlC3 host lattice was investigated by combining experimental synthesis (Nbx, Zr1-x)4AlC3 solid solutions with density functional theory calculations. High-purity were prepared reactive hot pressing NbH0.89, ZrH2, Al, and C starting powder mixtures. crystal structure produced determined using X-ray neutron diffraction. limited Zr (maximum 18.5% Nb content lattice) observed experimentally is consistent calculated minimum energy mixing. parameters...
Quasi phase-pure (>98 wt %) MAX phase solid solution ceramics with the (Zr,Ti)2(Al0.5,Sn0.5)C stoichiometry and variable Zr/Ti ratios were synthesized by both reactive hot pressing pressureless sintering of ZrH2, TiH2, Al, Sn, C powder mixtures. The influence different processing parameters, such as applied pressure atmosphere, on purity microstructure produced was investigated. addition Sn to (Zr,Ti)2AlC system key achieve purity. Its effect crystal structure a 211-type assessed calculating...
Kinking is a deformation mechanism ubiquitous to layered systems, ranging from the nanometer scale in crystalline solids, kilometer geological formations. Herein, we demonstrate its origins former through multiscale experiments and atomistic simulations. When compressively loaded parallel their basal planes, solids first buckle elastically, then nucleate atomic-scale, highly stressed ripplocation boundaries – process driven by redistributing strain energetically expensive in-plane bonds...
The addition of Nb and Sn to Zr2AlC is investigated, targeting the synthesis a Zr-rich bulk MAX phase free ZrC. 211 formation in two quaternary Zr-Nb-Al-C Zr-Al-Sn-C systems evaluated. Solubility over entire compositional range (Zr, Nb)2AlC Zr2(Al, Sn)C observed. In terms effectiveness, preferred Nb, as former selectively incorporated into structure. A combinatorial approach results phase-pure (Zr0.8, Nb0.2)2(Al0.5, Sn0.5)C. effect added solutes on microstructure crystallographic parameters...
The effect of severe plastic deformation on the deuterium retention in tungsten exposed to high-flux low-energy plasma (flux ∼ 1024 D/m2/s, energy 50 eV, and fluence up 3 × 1026 D/m2) at generator Pilot-PSI was studied by thermal desorption spectroscopy scanning electron microscopy. spectra both reference plastically deformed samples were deconvolved into three contributions attributed detrapping from dislocations, deuterium-vacancy clusters, pores, respectively. induced deformation,...
This work is a first assessment of the radiation tolerance nanolayered ternary carbides (MAX phases), Zr3AlC2, Nb4AlC3 and (Zr0.5,Ti0.5)3AlC2, using proton irradiation followed by post-irradiation examination based primarily on x-ray diffraction analysis. These specific MAX phase compounds are being evaluated as candidate coating materials for fuel cladding applications in advanced nuclear reactor systems. The aim to protect substrate material from corrosion damage during its exposure...