Reactive sintering behavior and enhanced densification of (Ti,Zr)B2–(Zr,Ti)C composites
Source abstract
Abstract
Abstract Reactive hot pressing was used to prepare (Ti,Zr)B2–(Zr,Ti)C composites from equimolar ZrB2 and TiC powders. The reaction and solid-solution coupling effect and enhanced densification in ZrB2-50 mol.% TiC were proposed as contrasted to conventional consolidation of TiB2-50 mol.% ZrC. The (Ti,Zr)B2–(Zr,Ti)C composite sintered at a temperature as low as 1750 °C exhibited negligible porosity and average grain sizes of 0.30 μm for (Ti,Zr)B2 and 0.36 μm for (Zr,Ti)C. Complete reaction and rapid densification of ZrB2-50 mol.% TiC was achieved at 1800 °C for only 10 min. The densification mechanism was mainly attributed to material transport through lattice diffusion of Ti and Zr atoms with an activation energy of 531 ± 16 kJ/mol. This study revealed for the first time novel insights into rapid densification of refractory fine-grained diboride–carbide composites by reactive hot pressing at relatively low temperatures.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced ceramic materials synthesis · Advanced materials and composites · MXene and MAX Phase Materials
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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