Synthesis of Cr2AlB2 MAB phase via Spark Plasma Sintering: Effect of temperature, dwell time, and Al content

Demir, Burak; Ayas, Erhan

doi:10.1016/j.mtla.2022.101416

Cited by 7 publications

(1 citation statement)

References 26 publications

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“…However, the bending strength of WC-10HEA is only half of that of WC-10Co, with the value of about 1350 MPa. According to the above analysis, the relative density is the lowest and the size of WC particle is the largest, both of which are harmful to the bending strength of WC-10HEA [42]. In addition, the poor wettability may also be an important reason, considering that the pulling out of WC particles is the main fracture mode.…”

Section: Mechanical Propertiesmentioning

confidence: 97%

Microstructure, Mechanical Properties and Wear Behaviors of Ultrafine-Grain WC-Based Cermets with Different Binder Phases Fabricated by Spark Plasma Sintering

Xu,

Wang,

Cao

et al. 2024

Materials

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In this work, to explore potential substitutions for the Co binder phase, ultrafine-grain WC-based cermets with various binder phases of Co, Ni and AlCoCrNiFeCu HEA were prepared using the SPS method. Based on SPS, WC-based cermets were fabricated at higher speed, showing fine carbide particles less than 410 μm. The microstructure, mechanical properties and wear properties were systematically evaluated. By comparison, the grain size of WC was the lowest for WC-10Co, while WC-10 HEA cermet held the coarsest WC particles. The hardness and fracture toughness of WC-10 HEA were the best among all three samples, with values of 93.2 HRA and 11.3 MP·m1/2. However, the bending strength of WC-10HEA was about 56.1% lower than that of WC-10Co, with a value of 1349.6 MPa. The reduction in bending strength is attributed to the lower density, formation of a newly Cr-Al rich phase and coarser WC grains. In dry sliding wear conditions, WC-10 HEA showed the lowest wear rate (0.98 × 10−6 mm3/(N·m)) and coefficient of friction (0.19), indicating the best wear resistance performance. This reveals that WC-based cermet with a HEA binder phase has superior wear performance due to the higher hardness and good self-lubricating effect of the wear products.

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Section: Mechanical Propertiesmentioning

confidence: 97%

Microstructure, Mechanical Properties and Wear Behaviors of Ultrafine-Grain WC-Based Cermets with Different Binder Phases Fabricated by Spark Plasma Sintering

Xu,

Wang,

Cao

et al. 2024

Materials

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Structural and Hydrogen Evolution Electrocatalysis Properties of Cr–Al–B MAB Phase Thin Films

Mockute,

Kostka,

Abdellaoui

et al. 2024

Adv Eng Mater

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Thin‐film materials libraries (MLs) in the system Cr–Al–B are synthesized on 100 mm diameter Al2O3 sapphire substrates by combinatorial co‐sputtering from elemental targets at substrate temperatures of 600 and 700 °C to study phase formation of MAB phases (M = transition metal, A = A‐group element, B = boron). The formation of a mixture of two MAB phases Cr2AlB2 and Cr3AlB4 on the larger part of the ML prepared at 700 °C is observed by X‐ray diffraction and cross‐sectional transmission electron microscopy (TEM). Anisotropic growth of large grains of the MAB phases extending throughout the entire film thickness is revealed. Depending on the composition, the microstructure shows different levels of porosity and grain interlinkage. Imaging in the high‐resolution TEM mode identifies regions with Cr2AlB2, Cr3AlB4, and intermixed Cr2AlB2 and Cr3AlB4 atomic stacking sequences. Additional to the structural properties, electrocatalytic activity toward the alkaline hydrogen evolution reaction is measured. Higher activities are linked to crystalline MAB‐phase areas, further enhanced by increased porosity of the film which enlarges the surface area and the exposure of the active (010) planes.

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Mechanical properties and oxidation behavior of (Mo,W)AlB, (Mo,Cr)AlB, and (Mo,W,Cr)AlB MAB solid solutions synthesized with spark plasma sintering

Demir,

Ayas

2024

Ceramics International

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Synthesis of Cr2AlB2 MAB phase via Spark Plasma Sintering: Effect of temperature, dwell time, and Al content

Cited by 7 publications

References 26 publications

Microstructure, Mechanical Properties and Wear Behaviors of Ultrafine-Grain WC-Based Cermets with Different Binder Phases Fabricated by Spark Plasma Sintering

Microstructure, Mechanical Properties and Wear Behaviors of Ultrafine-Grain WC-Based Cermets with Different Binder Phases Fabricated by Spark Plasma Sintering

Structural and Hydrogen Evolution Electrocatalysis Properties of Cr–Al–B MAB Phase Thin Films

Mechanical properties and oxidation behavior of (Mo,W)AlB, (Mo,Cr)AlB, and (Mo,W,Cr)AlB MAB solid solutions synthesized with spark plasma sintering

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