Effect of particle size, heating rate and CNT addition on densification, microstructure and mechanical properties of B4C ceramics

Baris Yavas; Filiz Sahin; Onuralp Yucel; Gultekin Goller

doi:10.1016/j.ceramint.2015.03.167

Effect of particle size, heating rate and CNT addition on densification, microstructure and mechanical properties of B₄C ceramics

Baris Yavas
, Filiz Sahin
, Onuralp Yucel
, Gultekin Goller^*

^*Bu çalışma için yazışmadan sorumlu yazar

Metalurji ve Malzeme Müh.Böl.

Istanbul Technical University

Araştırma sonucu: Dergiye katkı › Makale › bilirkişi

75 Atıf (Scopus)

Özet

Monolithic B₄C ceramics and B₄C-CNT composites were prepared by spark plasma sintering (SPS). The influence of particle size, heating rate, and CNT addition on sintering behavior, microstructure and mechanical properties were studied. Two different B₄C powders were used to examine the effect of particle size. The effect of heating rate on monolithic B₄C was investigated by applying three different heating rates (75, 150 and 225 °C/min). Moreover, in order to evaluate the effect of CNT addition, B₄C-CNT (0.5-3 mass%) composites were also produced. Fully dense monolithic B₄C ceramics were obtained by using heating rate of 75 °C/min. Vickers hardness value increased with increasing CNT content, and B₄C-CNT composite with 3 mass% CNTs had the highest hardness value of 32.8 GPa. Addition of CNTs and increase in heating rate had a positive effect on the fracture toughness and the highest fracture toughness value, 5.9 MPa m^1/2, was achieved in composite with 3 mass% CNTs.

Orijinal dil	İngilizce
Sayfa (başlangıç-bitiş)	8936-8944
Sayfa sayısı	9
Dergi	Ceramics International
Hacim	41
Basın numarası	7
DOI'lar	https://doi.org/10.1016/j.ceramint.2015.03.167
Yayın durumu	Yayınlandı - 1 Ağu 2015

Bibliyografik not

Publisher Copyright:
© 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

Finansman

This work was partially supported by Ministry of Science, Industry and Technology, Industrial Thesis (SANTEZ) programme (Project number: STZ.946.2011-2 ) and Scientific Research Project Funds of Istanbul Technical University (Project number: 37130 ). The authors thank H. Dincer for his contribution in SPS studies, H. H. Sezer and T. T. Alpak for SEM studies.

Finansörler	Finansör numarası
Ministry of Science, Industry and Technology, Industrial Thesis
SANTEZ	STZ.946.2011-2
Istanbul Teknik Üniversitesi	37130

Belgeye Erişim

10.1016/j.ceramint.2015.03.167

Diğer Dosyalar ve Linkler

Link to publication in Scopus

Alıntı Yap

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title = "Effect of particle size, heating rate and CNT addition on densification, microstructure and mechanical properties of B4C ceramics",

abstract = "Monolithic B4C ceramics and B4C-CNT composites were prepared by spark plasma sintering (SPS). The influence of particle size, heating rate, and CNT addition on sintering behavior, microstructure and mechanical properties were studied. Two different B4C powders were used to examine the effect of particle size. The effect of heating rate on monolithic B4C was investigated by applying three different heating rates (75, 150 and 225 °C/min). Moreover, in order to evaluate the effect of CNT addition, B4C-CNT (0.5-3 mass\%) composites were also produced. Fully dense monolithic B4C ceramics were obtained by using heating rate of 75 °C/min. Vickers hardness value increased with increasing CNT content, and B4C-CNT composite with 3 mass\% CNTs had the highest hardness value of 32.8 GPa. Addition of CNTs and increase in heating rate had a positive effect on the fracture toughness and the highest fracture toughness value, 5.9 MPa m1/2, was achieved in composite with 3 mass\% CNTs.",

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T1 - Effect of particle size, heating rate and CNT addition on densification, microstructure and mechanical properties of B4C ceramics

AU - Yavas, Baris

AU - Sahin, Filiz

AU - Yucel, Onuralp

AU - Goller, Gultekin

PY - 2015/8/1

Y1 - 2015/8/1

N2 - Monolithic B4C ceramics and B4C-CNT composites were prepared by spark plasma sintering (SPS). The influence of particle size, heating rate, and CNT addition on sintering behavior, microstructure and mechanical properties were studied. Two different B4C powders were used to examine the effect of particle size. The effect of heating rate on monolithic B4C was investigated by applying three different heating rates (75, 150 and 225 °C/min). Moreover, in order to evaluate the effect of CNT addition, B4C-CNT (0.5-3 mass%) composites were also produced. Fully dense monolithic B4C ceramics were obtained by using heating rate of 75 °C/min. Vickers hardness value increased with increasing CNT content, and B4C-CNT composite with 3 mass% CNTs had the highest hardness value of 32.8 GPa. Addition of CNTs and increase in heating rate had a positive effect on the fracture toughness and the highest fracture toughness value, 5.9 MPa m1/2, was achieved in composite with 3 mass% CNTs.

AB - Monolithic B4C ceramics and B4C-CNT composites were prepared by spark plasma sintering (SPS). The influence of particle size, heating rate, and CNT addition on sintering behavior, microstructure and mechanical properties were studied. Two different B4C powders were used to examine the effect of particle size. The effect of heating rate on monolithic B4C was investigated by applying three different heating rates (75, 150 and 225 °C/min). Moreover, in order to evaluate the effect of CNT addition, B4C-CNT (0.5-3 mass%) composites were also produced. Fully dense monolithic B4C ceramics were obtained by using heating rate of 75 °C/min. Vickers hardness value increased with increasing CNT content, and B4C-CNT composite with 3 mass% CNTs had the highest hardness value of 32.8 GPa. Addition of CNTs and increase in heating rate had a positive effect on the fracture toughness and the highest fracture toughness value, 5.9 MPa m1/2, was achieved in composite with 3 mass% CNTs.

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KW - Fracture toughness

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