Mechanical Properties of sintered B60-Alkaline earth metal oxide materials

Enoch N. Ogunmuyiwa, Oluwagbenga T. Johnson, Iakovos Sigalas, Ayo S. Afolabi

    Research output: Contribution to conferencePaper

    1 Citation (Scopus)

    Abstract

    Pure BtO powder and B60 powders admixed with 1.5 wt% of MgO, 1.4 wt% of CaO, and 0.7 wt% of CaCOj, were sintered and the microstructure, phase composition and mechanical properties were investigated. Pure B60 powders were sintered at a temperature of 1900°C and a load of 50 MPa for 20 minutes in an argon environment, while the B60-Admixed powders were sintered at a temperature of 1850°C and loads from 50-80 MPa, under the same environment. The addition of the alkaline earth metal oxide additives resulted in the formation of boride and borate phases, depending on the oxide used. More than 96% of theoretical densities were achieved and the result indicates a good combination of hardness (between 31.6-32.1 GPa) and fracture toughness (between 6.1-6.8 MPa.m0-5) in the B60-Alkalinc earth oxide materials. The introduction of the additive enhances the improvement in the fracture toughness of the pure B60- materials. The fracture mode observed in the sintered materials is mainly transgranular.

    Original languageEnglish
    Pages740-745
    Number of pages6
    Publication statusPublished - 2015
    Event2015 World Congress on Engineering, WCE 2015 - London, United Kingdom
    Duration: Jul 1 2015Jul 3 2015

    Other

    Other2015 World Congress on Engineering, WCE 2015
    CountryUnited Kingdom
    CityLondon
    Period7/1/157/3/15

    Fingerprint

    Alkaline earth metals
    Powders
    Mechanical properties
    Oxides
    Fracture toughness
    Borides
    Phase composition
    Argon
    Earth (planet)
    Hardness
    Temperature
    Microstructure

    All Science Journal Classification (ASJC) codes

    • Computer Science (miscellaneous)

    Cite this

    Ogunmuyiwa, E. N., Johnson, O. T., Sigalas, I., & Afolabi, A. S. (2015). Mechanical Properties of sintered B60-Alkaline earth metal oxide materials. 740-745. Paper presented at 2015 World Congress on Engineering, WCE 2015, London, United Kingdom.
    Ogunmuyiwa, Enoch N. ; Johnson, Oluwagbenga T. ; Sigalas, Iakovos ; Afolabi, Ayo S. / Mechanical Properties of sintered B60-Alkaline earth metal oxide materials. Paper presented at 2015 World Congress on Engineering, WCE 2015, London, United Kingdom.6 p.
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    abstract = "Pure BtO powder and B60 powders admixed with 1.5 wt{\%} of MgO, 1.4 wt{\%} of CaO, and 0.7 wt{\%} of CaCOj, were sintered and the microstructure, phase composition and mechanical properties were investigated. Pure B60 powders were sintered at a temperature of 1900°C and a load of 50 MPa for 20 minutes in an argon environment, while the B60-Admixed powders were sintered at a temperature of 1850°C and loads from 50-80 MPa, under the same environment. The addition of the alkaline earth metal oxide additives resulted in the formation of boride and borate phases, depending on the oxide used. More than 96{\%} of theoretical densities were achieved and the result indicates a good combination of hardness (between 31.6-32.1 GPa) and fracture toughness (between 6.1-6.8 MPa.m0-5) in the B60-Alkalinc earth oxide materials. The introduction of the additive enhances the improvement in the fracture toughness of the pure B60- materials. The fracture mode observed in the sintered materials is mainly transgranular.",
    author = "Ogunmuyiwa, {Enoch N.} and Johnson, {Oluwagbenga T.} and Iakovos Sigalas and Afolabi, {Ayo S.}",
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    Ogunmuyiwa, EN, Johnson, OT, Sigalas, I & Afolabi, AS 2015, 'Mechanical Properties of sintered B60-Alkaline earth metal oxide materials' Paper presented at 2015 World Congress on Engineering, WCE 2015, London, United Kingdom, 7/1/15 - 7/3/15, pp. 740-745.

    Mechanical Properties of sintered B60-Alkaline earth metal oxide materials. / Ogunmuyiwa, Enoch N.; Johnson, Oluwagbenga T.; Sigalas, Iakovos; Afolabi, Ayo S.

    2015. 740-745 Paper presented at 2015 World Congress on Engineering, WCE 2015, London, United Kingdom.

    Research output: Contribution to conferencePaper

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    AU - Ogunmuyiwa, Enoch N.

    AU - Johnson, Oluwagbenga T.

    AU - Sigalas, Iakovos

    AU - Afolabi, Ayo S.

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    PY - 2015

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    N2 - Pure BtO powder and B60 powders admixed with 1.5 wt% of MgO, 1.4 wt% of CaO, and 0.7 wt% of CaCOj, were sintered and the microstructure, phase composition and mechanical properties were investigated. Pure B60 powders were sintered at a temperature of 1900°C and a load of 50 MPa for 20 minutes in an argon environment, while the B60-Admixed powders were sintered at a temperature of 1850°C and loads from 50-80 MPa, under the same environment. The addition of the alkaline earth metal oxide additives resulted in the formation of boride and borate phases, depending on the oxide used. More than 96% of theoretical densities were achieved and the result indicates a good combination of hardness (between 31.6-32.1 GPa) and fracture toughness (between 6.1-6.8 MPa.m0-5) in the B60-Alkalinc earth oxide materials. The introduction of the additive enhances the improvement in the fracture toughness of the pure B60- materials. The fracture mode observed in the sintered materials is mainly transgranular.

    AB - Pure BtO powder and B60 powders admixed with 1.5 wt% of MgO, 1.4 wt% of CaO, and 0.7 wt% of CaCOj, were sintered and the microstructure, phase composition and mechanical properties were investigated. Pure B60 powders were sintered at a temperature of 1900°C and a load of 50 MPa for 20 minutes in an argon environment, while the B60-Admixed powders were sintered at a temperature of 1850°C and loads from 50-80 MPa, under the same environment. The addition of the alkaline earth metal oxide additives resulted in the formation of boride and borate phases, depending on the oxide used. More than 96% of theoretical densities were achieved and the result indicates a good combination of hardness (between 31.6-32.1 GPa) and fracture toughness (between 6.1-6.8 MPa.m0-5) in the B60-Alkalinc earth oxide materials. The introduction of the additive enhances the improvement in the fracture toughness of the pure B60- materials. The fracture mode observed in the sintered materials is mainly transgranular.

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    Ogunmuyiwa EN, Johnson OT, Sigalas I, Afolabi AS. Mechanical Properties of sintered B60-Alkaline earth metal oxide materials. 2015. Paper presented at 2015 World Congress on Engineering, WCE 2015, London, United Kingdom.