Behavior of Ultrahigh-Temperature ZrB2-Based Ceramics in Oxidation

Grigoriev, O. N.; Neshpor, I. P.; Mosina, T. V.; Vinokurov, V. B.; Koroteev, A. V.; Buriachek, O. V.; Vedel, D. V.; Stepanchuk, A. N.; Silvestroni, L.

doi:10.1007/s11106-018-9930-z

Cited by 12 publications

(2 citation statements)

References 7 publications

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“…It has been proven that porosity accelerates oxygen diffusion. 21 This behavior is more remarkable in the mid-temperature range (1200 • C−1600 • C), where the structural damage of the specimens is still moderate and less chaotic. A liquid oxide layer extruding from the bulk material fills porosities that lead to passive oxygen diffusion.…”

Section: Impact Of Sintering Methods and Microstructure Characteristics On The Oxidation Behaviormentioning

confidence: 97%

A critical analysis of the parameters affecting the oxidation behavior of ultra‐high‐temperature diboride ceramics

et al. 2021

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In the last few decades, research on the processing and properties of ultrahigh-temperature ceramics (UHTCs) has generated a substantial base of knowledge and left several unanswered questions. There is a large scatter in the literature data associated with the processing of UHTC borides prompting the non-reproducibility and non-uniformity in the microstructure and, thus, desired properties. Herein, the data on the oxidation behavior of UHTC borides ubiquitous in the entire literature are analyzed to understand the effect of composition, sintering parameters, densification, grain size, and oxidation conditions.A conjunction of graphical methods has been utilized to converge the scattered data and correlate the effect of variables and testing environment on the oxidation behavior. It was concluded that high densification (>95%), large grain size (∼8 μm), and 20-30 vol.% of Si-containing additives (SiC, Ta 5 Si 3 , and TaSi 2 ) could augment the oxidation resistance. The study elucidates that oxide scale thickness should be preferred over mass gain in future studies as a metric for measuring oxidation. The analysis presented here will allow the UHTC community to optimize diboride materials' design for hypersonic applications. The developed database on the oxidation performance of diborides will also transfer knowledge beyond the memory banks of the experts in the field. Furthermore, well-structured databases such as the one developed herein could be employed in data-driven approaches to optimize the design and manufacturing of ultrahigh-temperature materials in an efficient scheme.

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Section: Impact Of Sintering Methods and Microstructure Characteristics On The Oxidation Behaviormentioning

confidence: 97%

A critical analysis of the parameters affecting the oxidation behavior of ultra‐high‐temperature diboride ceramics

et al. 2021

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“…UHTCs have a wide range of applications such as aerospace, automotive manufacturing, precision instrument preparation under extreme conditions and so on mainly characterized by their high melting point of above 3000 • C [120][121][122][123][124][125][126][127][128][129][130]. It is reported that TMdBs is an excellent representative of UHTC who possess high melting points as shown in figure 9 [131].…”

Section: Ultra-high Temperature Ceramics (Uhtcs)mentioning

confidence: 99%

Mechanical properties and multifunctionality of AlB₂-type transition metal diborides ^*

Li¹,

Zhao²,

Wang³

et al. 2022

J. Phys.: Condens. Matter

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Transition metal diborides (TMdBs, P6/mmm, AlB2-type) have attracted much attention for decades, due to TMdBs can be conductors, superconductors, magnetism materials, and catalysts. The layered structure caused by borophene subunit is the source of functions, and also make TMdBs be a potential bank of Mbene. However, TMdBs also exhibit high hardness which is not supposed to have in layered structure. The high hardness of TMdBs arise from covalent bonds of Boron-boron (B-B) and strong p-d orbit hybridization of B and TM. While, strong B-TM bonds will eliminate the layered structure which may damage the functional properties. Understanding the basic mechanism of hardness and functional is significant to achieve optimal TMdBs. In this work, the basic properties of TMdBs include hardness, superconductor, and catalytic property are summarized. It can be found that Youngs modulus (E) and Shear modulus (G) are beneficial for the hardness of TMdBs and Poisson ratio is the opposite. The increasing of atomic radius of TM brings the improvement for the hardness of TMdBs before it reaches the highest value 1.47 Å, beyond which hardness decreases. Besides, TMdBs also have excellent activity comparable with some noble metal for hydrogen evolution reaction, which is closely related with d-band center. More importantly, higher valence electron concentrations were found to be adverse for hardness and superconductivity of TMdBs and greatly affect their catalytic properties. This review is of guiding significance for the further explore the relation between structures and properties of TMdBs.

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Influence of High–Temperature Oxidation on the Strength of Ceramics Based on ZrB2

et al. 2022

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Behavior of Ultrahigh-Temperature ZrB2-Based Ceramics in Oxidation

Cited by 12 publications

References 7 publications

A critical analysis of the parameters affecting the oxidation behavior of ultra‐high‐temperature diboride ceramics

A critical analysis of the parameters affecting the oxidation behavior of ultra‐high‐temperature diboride ceramics

Mechanical properties and multifunctionality of AlB₂-type transition metal diborides ^*

Influence of High–Temperature Oxidation on the Strength of Ceramics Based on ZrB2

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Behavior of Ultrahigh-Temperature ZrB2-Based Ceramics in Oxidation

Cited by 12 publications

References 7 publications

A critical analysis of the parameters affecting the oxidation behavior of ultra‐high‐temperature diboride ceramics

A critical analysis of the parameters affecting the oxidation behavior of ultra‐high‐temperature diboride ceramics

Mechanical properties and multifunctionality of AlB2-type transition metal diborides *

Influence of High–Temperature Oxidation on the Strength of Ceramics Based on ZrB2

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Mechanical properties and multifunctionality of AlB₂-type transition metal diborides ^*