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In Situ Fabrication and Properties of 0.4MoB-0.1SiC-xMoSi2 Composites by Self-propagating Synthesis and Hot-press sintering
School of Materials Science and Engineering, China University of Mining & Technology, Xuzhou .
School of Materials Science and Engineering, China University of Mining & Technology, Xuzhou .
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou.
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science.ORCID iD: 0000-0003-4888-6237
2018 (English)In: Ceramics International, ISSN 0272-8842, E-ISSN 1873-3956, Vol. 44, no 1, 51-56 p.Article in journal (Refereed) Published
Abstract [en]

Mo, Si and B4C powders were used to fabricate 0.4MoB-0.1SiC-xMoSi2 composites by self-propagating high-temperature synthesis (SHS) and hot pressing (HP). The effects of MoSi2 content (x=1, 0.75, 0.5 and 0.25) on phase composition, microstructure and properties of the composites were investigated. The results showed that the 0.4MoB-0.1SiC-xMoSi2 composite exhibited Vickers hardness of 10.7–15.2 GPa, bending strength of 337–827 MPa and fracture toughness of 4.9–7.0 MPa∙m1/2. The fracture toughness increased with the increasing volume fraction of MoB and SiC particles which were promoted by the toughening mechanisms, such as crack bridging, cracks deflection and crack branching. Moreover, the electrical resistivity showed an increasing trend with decreasing volume fraction of MoSi2.

Place, publisher, year, edition, pages
Elsevier, 2018. Vol. 44, no 1, 51-56 p.
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-66006DOI: 10.1016/j.ceramint.2017.08.207OAI: oai:DiVA.org:ltu-66006DiVA: diva2:1147849
Note

Validerad;2017;Nivå 2;2017-11-09 (andbra)

Available from: 2017-10-09 Created: 2017-10-09 Last updated: 2017-11-24Bibliographically approved

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