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

All Science Journal Classification (ASJC) codes

  • Computer Science (miscellaneous)

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    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. https://pdfs.semanticscholar.org/49c5/80c7c01231cbc4ace63a6cba1c2a110b5505.pdf