Effect of sintering techniques on the microstructure and mechanical properties of niobium borides

Özge Balcı; Duygu Ağaoğulları; Faiz Muhaffel; M. Lütfi Öveçoğlu; Hüseyin Çimenoğlu; İsmail Duman

doi:10.1016/j.jeurceramsoc.2016.05.014

Effect of sintering techniques on the microstructure and mechanical properties of niobium borides

Özge Balcı^*
, Duygu Ağaoğulları
, Faiz Muhaffel
, M. Lütfi Öveçoğlu
, Hüseyin Çimenoğlu
, İsmail Duman

^*Bu çalışma için yazışmadan sorumlu yazar

Metalurji ve Malzeme Müh.Böl.

Istanbul Technical University
Koc University

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

23 Atıf (Scopus)

Özet

This study reports on the consolidation of niobium boride powders by cold pressing/pressureless sintering (PS, with or without Co addition) and spark plasma sintering (SPS) techniques. Niobium boride powders (containing NbB, Nb₃B₄ and NbB₂ phases) which were mechanochemically synthesized from Nb₂O₅, B₂O₃ and Mg blends and purified by HCl leaching were used as precursor material. The effects of different sintering techniques on the consolidation behaviour, microstructure, densification rate and mechanical properties (microhardness, wear characteristics, elastic modulus, indentation response and fracture toughness) of the bulk products were investigated. PS with Co addition resulted in superior properties than those yielded after PS without Co addition and SPS. Bulk niobium boride products having relative density of 93–98%, microhardness of 24–28 GPa, wear volume loss of 2.8–4.5 × 10⁻⁴ mm³, elastic modulus of 508–552 GPa and fracture toughness of 4.05–4.74 MPa m^1/2 were obtained by Co (2 or 5 wt.%) activated PS at 1500 °C.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	3113-3123
Sayfa sayısı	11
Dergi	Journal of the European Ceramic Society
Hacim	36
Basın numarası	13
DOI'lar	https://doi.org/10.1016/j.jeurceramsoc.2016.05.014
Yayın durumu	Yayınlandı - 1 Eki 2016

Bibliyografik not

Publisher Copyright:
© 2016 Elsevier Ltd

Finansman

This research investigation was financially supported by “The Scientific and Technological Research Council of Turkey (TÜBİTAK)” with the project title of “Synthesis of Refractory Metal Borides via Three Different Production Methods from Solid, Liquid and Gas Raw Materials for Various Application Areas; Sintering, Characterization, Comparison of Process and Final Products” and with the project number of 112M470. Further, the authors wish to express their appreciations to Prof. Dr. Servet Turan for his help with the SPS experiments.

Finansörler	Finansör numarası
TÜBİTAK	112M470
Türkiye Bilimsel ve Teknolojik Araştirma Kurumu

Belgeye Erişim

10.1016/j.jeurceramsoc.2016.05.014

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Effect of sintering techniques on the microstructure and mechanical properties of niobium borides",

abstract = "This study reports on the consolidation of niobium boride powders by cold pressing/pressureless sintering (PS, with or without Co addition) and spark plasma sintering (SPS) techniques. Niobium boride powders (containing NbB, Nb3B4 and NbB2 phases) which were mechanochemically synthesized from Nb2O5, B2O3 and Mg blends and purified by HCl leaching were used as precursor material. The effects of different sintering techniques on the consolidation behaviour, microstructure, densification rate and mechanical properties (microhardness, wear characteristics, elastic modulus, indentation response and fracture toughness) of the bulk products were investigated. PS with Co addition resulted in superior properties than those yielded after PS without Co addition and SPS. Bulk niobium boride products having relative density of 93–98\%, microhardness of 24–28 GPa, wear volume loss of 2.8–4.5 × 10−4 mm3, elastic modulus of 508–552 GPa and fracture toughness of 4.05–4.74 MPa m1/2 were obtained by Co (2 or 5 wt.\%) activated PS at 1500 °C.",

keywords = "Cold pressing/pressureless sintering, Mechanical properties, Microstructure, Niobium borides, Spark plasma sintering",

author = "{\"O}zge Balcı and Duygu Ağaoğulları and Faiz Muhaffel and {\"O}ve{\c c}oğlu, \{M. L{\"u}tfi\} and H{\"u}seyin {\c C}imenoğlu and İsmail Duman",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd",

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doi = "10.1016/j.jeurceramsoc.2016.05.014",

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T1 - Effect of sintering techniques on the microstructure and mechanical properties of niobium borides

AU - Balcı, Özge

AU - Ağaoğulları, Duygu

AU - Muhaffel, Faiz

AU - Öveçoğlu, M. Lütfi

AU - Çimenoğlu, Hüseyin

AU - Duman, İsmail

PY - 2016/10/1

Y1 - 2016/10/1

N2 - This study reports on the consolidation of niobium boride powders by cold pressing/pressureless sintering (PS, with or without Co addition) and spark plasma sintering (SPS) techniques. Niobium boride powders (containing NbB, Nb3B4 and NbB2 phases) which were mechanochemically synthesized from Nb2O5, B2O3 and Mg blends and purified by HCl leaching were used as precursor material. The effects of different sintering techniques on the consolidation behaviour, microstructure, densification rate and mechanical properties (microhardness, wear characteristics, elastic modulus, indentation response and fracture toughness) of the bulk products were investigated. PS with Co addition resulted in superior properties than those yielded after PS without Co addition and SPS. Bulk niobium boride products having relative density of 93–98%, microhardness of 24–28 GPa, wear volume loss of 2.8–4.5 × 10−4 mm3, elastic modulus of 508–552 GPa and fracture toughness of 4.05–4.74 MPa m1/2 were obtained by Co (2 or 5 wt.%) activated PS at 1500 °C.

AB - This study reports on the consolidation of niobium boride powders by cold pressing/pressureless sintering (PS, with or without Co addition) and spark plasma sintering (SPS) techniques. Niobium boride powders (containing NbB, Nb3B4 and NbB2 phases) which were mechanochemically synthesized from Nb2O5, B2O3 and Mg blends and purified by HCl leaching were used as precursor material. The effects of different sintering techniques on the consolidation behaviour, microstructure, densification rate and mechanical properties (microhardness, wear characteristics, elastic modulus, indentation response and fracture toughness) of the bulk products were investigated. PS with Co addition resulted in superior properties than those yielded after PS without Co addition and SPS. Bulk niobium boride products having relative density of 93–98%, microhardness of 24–28 GPa, wear volume loss of 2.8–4.5 × 10−4 mm3, elastic modulus of 508–552 GPa and fracture toughness of 4.05–4.74 MPa m1/2 were obtained by Co (2 or 5 wt.%) activated PS at 1500 °C.

KW - Cold pressing/pressureless sintering

KW - Mechanical properties

KW - Microstructure

KW - Niobium borides

KW - Spark plasma sintering

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U2 - 10.1016/j.jeurceramsoc.2016.05.014

DO - 10.1016/j.jeurceramsoc.2016.05.014

M3 - Article

AN - SCOPUS:84975449313

SN - 0955-2219

VL - 36

SP - 3113

EP - 3123

JO - Journal of the European Ceramic Society

JF - Journal of the European Ceramic Society

IS - 13

ER -

Effect of sintering techniques on the microstructure and mechanical properties of niobium borides

Özet

Bibliyografik not

Finansman

Belgeye Erişim

Diğer Dosyalar ve Linkler

Parmak izi

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