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

Melis Kaplan Akarsu, Ipek Akin*, Filiz Sahin, Gultekin Goller

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2 Atıf (Scopus)

Özet

The influence of two different spark plasma sintering (SPS)-based processing routes (i.e., reactive SPS [RSPS] and nonreactive SPS) on the properties of TaB2-TaC composites was investigated. Ta2O5 and B4C powders were used as starting materials in the RSPS method, and synthesis and densification of TaB2-TaC composites were accomplished in a facile single step. The effect of sintering temperature and time on the microstructure and densification of the in-situ RSPS were investigated. The obtained results were compared with nonreactive spark plasma sintered TaB2-TaC composites. The highest densification (∼99.5%) was achieved for the TaB2-TaC composite with 6.64 vol.% TaC after reactive sintering at 1550°C under 40 MPa with a 5 min holding time. Although lower SPS temperature was used in the RSPS method, better densification and higher Vickers hardness were obtained compared to the nonreactive SPS. While platelet-shaped TaC formation was observed in both processes, the average grain size was smaller in the RSPS method. On the other hand, no significant difference was detected in the oxidation behavior of the composites produced by RSPS and nonreactive SPS.

Orijinal dilİngilizce
Sayfa (başlangıç-bitiş)332-343
Sayfa sayısı12
DergiInternational Journal of Applied Ceramic Technology
Hacim19
Basın numarası1
DOI'lar
Yayın durumuYayınlandı - 1 Oca 2022

Bibliyografik not

Publisher Copyright:
© 2021 The American Ceramic Society

Finansman

This work was supported by Istanbul Technical University (Grant number MGA‐2017‐40907). Tantalum diboride powder studies were financially supported by TENMAK ‐ Boron Research Institute (BOREN) project (2021‐31‐07‐20E‐001). The authors are thankful to Huseyin Sezer, Burak Cagrı Ocak, Can Burak Danisman, and Baris Yavas for microstructural investigations, and SPS experiments, respectively. This work was supported by Istanbul Technical University (Grant number MGA-2017-40907). Tantalum diboride powder studies were financially supported by TENMAK - Boron Research Institute (BOREN) project (2021-31-07-20E-001). The authors are thankful to Huseyin Sezer, Burak Cagrı Ocak, Can Burak Danisman, and Baris Yavas for microstructural investigations, and SPS experiments, respectively.

FinansörlerFinansör numarası
Boron Research Institute
TENMAK
TENMAK ‐ Boron Research Institute
Ulusal Bor Araştırma Enstitüsü2021‐31‐07‐20E‐001
Istanbul Teknik ÜniversitesiMGA‐2017‐40907

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