2011
DOI: 10.1016/j.msea.2010.10.022
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Microstructure and mechanical properties of pulsed electric current sintered B4C–TiB2 composites

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Cited by 125 publications
(77 citation statements)
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References 25 publications
(46 reference statements)
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“…A recent study showed that hot pressing and pulsed electric current sintering aided in increasing the density of TiB 2 while decreasing the sintering time. 11,12 Another way to make B 4 C-TiB 2 composites is via in situ reaction of TiO 2 , carbon and B 4 C 3-5 or from elemental powders. 13 A flexural strength of 866 MPa and fracture toughness of 3.2 MPa m 1/2 were reported for fully dense B 4 C-20 mol% (15 vol%) TiB 2 composites made from B 4 C, TiO 2 and carbon black mixtures prepared by reaction hot pressing for 1 h at 2000 • C under a pressure of 50 MPa.…”
Section: Introductionmentioning
confidence: 99%
“…A recent study showed that hot pressing and pulsed electric current sintering aided in increasing the density of TiB 2 while decreasing the sintering time. 11,12 Another way to make B 4 C-TiB 2 composites is via in situ reaction of TiO 2 , carbon and B 4 C 3-5 or from elemental powders. 13 A flexural strength of 866 MPa and fracture toughness of 3.2 MPa m 1/2 were reported for fully dense B 4 C-20 mol% (15 vol%) TiB 2 composites made from B 4 C, TiO 2 and carbon black mixtures prepared by reaction hot pressing for 1 h at 2000 • C under a pressure of 50 MPa.…”
Section: Introductionmentioning
confidence: 99%
“…The influence of the PECS parameters on the physical and mechanical properties of the B 4 C-TiB 2 composites is reported elsewhere. 6 Details on the equipment, die/punch setup and temperature control are provided in [9]. Hot pressed B 4 C with 40 vol.% TiB 2 and 2 wt% free carbon (BT-VR44, ESK Ceramics, Germany) was used as a commercial reference material and labelled as BT 60/40.…”
Section: Methodsmentioning
confidence: 99%
“…4,5 B 4 C-TiB 2 composites with 20-80 vol.% TiB 2 can also be densified using pulsed electric current sintering (PECS) revealing an increasing fracture toughness and decreasing hardness with increasing TiB 2 content. 6 A fracture toughness of 4 MPa m 1/2 , in combination with a Vickers hardness of 3200 kg/mm 2 and a three point bending strength of 800 MPa are reported for 40 vol.% TiB 2 composites PECS at 2000 • C for 4 min under an applied pressure of 60 MPa. 6 Besides influencing the mechanical properties, the addition of highly electrically conductive TiB 2 (10.3 × 10 6 S/m 7 ) particles allows increasing the conductivity of the semi-conductor B 4 C (2.04 × 10 2 S/m 7 ) matrix, allowing the application of electrical discharge machining (EDM).…”
Section: Introductionmentioning
confidence: 91%
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“…For instance, hot-pressed B 4 C-TiB 2 composite prepared by Ru showed high strength and toughness of 506 MPa and 9.4 MPa m 1/2 , respectively, but the hardness was just only 23.6 GPa [15]. In comparison, hot-pressed B 4 C-TiB 2 composite prepared by J.Vleugels showed a combination of high strength and high toughness of 867 MPa and 29 GPa, while the fracture toughness was modest (4.5 MPa m 1/2 ) [16]. Similar phenomenon was also observed by Yamada.…”
Section: Introductionmentioning
confidence: 93%