Oxidation Behavior of Tantalum Boride Ceramics

Matsushita, Jun‐ichi; Hwang, Geum Chan; Shim, Kwang Bo

doi:10.4028/3-908451-31-0.819

Cited by 3 publications

(5 citation statements)

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“…A mass loss was observed for PC‐1 up to approximately 500℃, whereas weight started to increase at approximately 600℃ for RSC‐3 and after approximately 500℃ for PC‐1. The oxidation of TaB 2 and TaC starts at approximately 600 and 400℃, respectively 46,47 . Both composites exhibited passive oxidation behavior that formed a protective oxide film on the surface according to oxidation of TaB 2 (Equations [7, ]).…”

Section: Resultsmentioning

confidence: 99%

“…The weight started to increase at ~ 600 ℃ for RSC-3 and ~ 500 ℃ for PC-1. The oxidation of TaB2 and TaC starts at ~ 600 ℃ and 400 ℃, respectively [34,35]. Both composites exhibited passive oxidation behavior that formed a protective oxide film on the surface according to oxidation of TaB2.…”

Section: Tg Analysismentioning

confidence: 99%

“…The oxidation of TaB 2 and TaC starts at approximately 600 and 400°C, respectively. 46,47 Both composites exhibited passive oxidation behavior that formed a protective oxide film on the surface according to oxidation of TaB 2 (Equations [7,8]). Desmasion-Brut et al 44 reported that TaC does not form an oxide layer.…”

Section: Tg Analysismentioning

confidence: 99%

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Comparative study of reactive and nonreactive spark plasma sintering routes for the production of TaB₂‐TaC composites

Akarsu

Akin

Şahin

et al. 2021

Int J Applied Ceramic Tech

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I am enclosing herewith a manuscript entitled "Comparative study of reactive and non-reactive spark plasma sintering routes for the production of TaB2-TaC composites" for consideration for possible publication in Journal of Advanced Ceramics.In this study, the influence of reactive spark plasma sintering (RSPS) and non-reactive spark plasma sintering based processing routes on the properties of TaB2-TaC composites were investigated. Investigations on densification behavior, microstructure, mechanical properties and oxidation behavior of the samples were presented. A near fully dense reactive spark plasma sintered TaB2 -TaC composite with 6.64 vol% TaC was produced by using Ta2O5 and B4C as reactants.This study is related with the aims of scope of Journal of Advanced Ceramics in terms of advanced materials processing, structure characterization and properties. Ultra-high temperature ceramics were produced by spark plasma sintering, and then structural characterization and property measurements were conducted.To the best of our knowledge, this is the first study that investigates the production parameters and mechanical properties of the bulk form of reactively sintered TaB2-TaC composites. This manuscript describes original work and is not under consideration by any other journal. All authors have seen and approved the manuscript.Thank you for receiving our manuscript and considering it for review. I really appreciate your time and look forward to your quick response.

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Section: Resultsmentioning

confidence: 99%

Section: Tg Analysismentioning

confidence: 99%

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Comparative study of reactive and nonreactive spark plasma sintering routes for the production of TaB₂‐TaC composites

Akarsu

Akin

Şahin

et al. 2021

Int J Applied Ceramic Tech

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“…For instance, oxidative tests conducted on ZrB 2 coatings developed for possible photothermal solar applications indicate that the maximum operating temperature for air exposure was about 600°C (39). Analogous considerations can be made for TaB 2 (40). Thus, no oxidative problems are expected to occur below such temperature limits for the use of monolithic ZrB 2 and TaB 2 as solar absorber.…”

Section: Discussionmentioning

confidence: 99%

Optical properties of dense zirconium and tantalum diborides for solar thermal absorbers

et al. 2016

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Ultra-high temperature ceramics (UHTCs) are interesting materials for a large variety of applications under extreme conditions. This paper reports on the production and extensive characterization of highly dense, pure zirconium and tantalum diborides, with particular interest to their potential utilization in the thermal solar energy field. Monolithic bulk samples are produced by Spark Plasma Sintering starting from elemental reactants or using metal diboride powders previously synthesized by Self-propagating High-temperature Synthesis (SHS). Microstructural and optical properties of products obtained by the two processing methods have been comparatively evaluated. We found that pure diborides show a good spectral selectivity, which is an appealing characteristic for solar absorber applications. No, or very small, differences in the optical properties have been evidenced when the two investigated processes adopted for the fabrication of dense TaB2 and ZrB2, respectively, are compared

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“…In order to these, the addition of Si-based compositions (MoSi2, TaSi2, SiC, etc.) is the most widely used as secondary phase [7][8][9][10]. Further, different nanoscale carbon forms like carbon nanotubes (CNTs), graphene nanoplatelet (GNPs) addition is also prefered to improve fracture toughness of this material in recent years.…”

Section: Introductionmentioning

confidence: 99%

Microstructures and mechanical properties of graphene platelets-reinforced spark plasma sintered tantalum diboride-silicon carbide composites

Gürcan¹,

İnci²,

Sackan³

et al. 2019

Mater. Res. Express

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Graphene nanoplates reinforcement (GNPs) TaB2-SiC composites were fabricated with Spark Plazma sintering (SPS) at 1850°C with a-uniaxial pressure of 50 MPa and 10 min dwell time. Systematic investigation on the effect of GNP amount ofdensification, microstructural and mechanical properties (microhardness and fracture toughness) of the composites were presented. Density and hardness of composites decreased with the addition of GNP, while ~35% increase of fracture toughness value was obtained with GNP addition. The microstructural evaluation indicated that overlapped and agglomerated GNPs increased with an increasing amount of GNP in the composites and caused to decrease of density and hardness. On the other hand, GNP was retained in the composite form even with high process temperature (1850°C) and cause toughening of composites with changing the fracture mode from transgranular to transgranular/intergranular fracture. GNP pull out, crack branching, crack bridging and crack deflection were observed as main toughening mechanisms.

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Oxidation Behavior of Tantalum Boride Ceramics

Cited by 3 publications

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Comparative study of reactive and nonreactive spark plasma sintering routes for the production of TaB₂‐TaC composites

Comparative study of reactive and nonreactive spark plasma sintering routes for the production of TaB₂‐TaC composites

Optical properties of dense zirconium and tantalum diborides for solar thermal absorbers

Microstructures and mechanical properties of graphene platelets-reinforced spark plasma sintered tantalum diboride-silicon carbide composites

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Oxidation Behavior of Tantalum Boride Ceramics

Cited by 3 publications

References 0 publications

Comparative study of reactive and nonreactive spark plasma sintering routes for the production of TaB2‐TaC composites

Comparative study of reactive and nonreactive spark plasma sintering routes for the production of TaB2‐TaC composites

Optical properties of dense zirconium and tantalum diborides for solar thermal absorbers

Microstructures and mechanical properties of graphene platelets-reinforced spark plasma sintered tantalum diboride-silicon carbide composites

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Comparative study of reactive and nonreactive spark plasma sintering routes for the production of TaB₂‐TaC composites

Comparative study of reactive and nonreactive spark plasma sintering routes for the production of TaB₂‐TaC composites