PSI - Issue 23

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Available online at www.sciencedirect.com Structural Integrity Procedia 00 (2019) 000 – 000 Structural Integrity Procedia 00 (2019) 000 – 000

www.elsevier.com/locate/procedia www.elsevier.com/locate/procedia

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Procedia Structural Integrity 23 (2019) 505–510

© 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the ICMSMF organizers © 201 9 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. Ceramics matrix composites are rather expe sive due to th demanding processing as well a costly raw materials. Modificati n of the surface of the fibre is the most common but exp nsive technique to ma imise toughness of CMCs. Th prospective method can be a modification of matrix as wa demonstrated for the SiOC matrix reinfo ced by bas lt fibre r cently. The partial pyrolysed SiOC matr ix based composites at 650°C were used for this study. All pr duction param ters remain the same only reinforc ng fibre were different. This work aims at th fibre chemical composition ffect on the mechanic l properties of composites. The str ng effect of the fibres used is observed on the flexural strength values where basalt fibres reaching the level of 800 MP . The com sites reinforced by ca bon a d R Glas rea ed 200 MPa and E Glass only 125 MP . The fractur toughness values correspond well with the flexural strength results hich are in a good gree ent with the expectations when the defect size is on the c mparable l vel. Two silicate glass fibres with imilar chemical co position as basalt fibres, differing mainly in th presence f ir n oxides what indicates that iron oxide is responsible for an optimal fibre – matrix bonding in case of basalt fibre reinforced composite. © 201 9 The Authors. Published by Elsevier B.V. This is an open acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 9th International Conference on Materials Structure and Micromechanics of Fracture Behaviour of Partially Pyrolysed Composite Reinforced by Fibres of Various Compositions Zdeněk Chlup a *, Martin Černý b , Martina Halasová c and Adam Strachota d a CEITEC IPM, Institute of Physics of Materials AS CR, v.v.i., Zizkova 22, 616 62 Brno, Czech Republic b Institute of Rock Structure and Mechanics AS CR, v.v.i., V Holesovickach 94/41, 182 09 Prague 8, Czech Republic c Institute of Physics of Materials AS CR, v.v.i., Zizkova 22, 616 62 Brno, Czech Republic d Institute of Macromolecular Chemistry AS CR, v.v.i., Heyrovskeho nam.2, 162 06 Praha 6 - Brevnov, Czech Republic Ceramics matrix composites are rather expensive due to the demanding processing as well as costly raw materials. Modification of the surface of the fibre is the most common but expensive technique to maximise toughness of CMCs. The prospective method can be a modification of a matrix as was demonstrated for the SiOC matrix reinforced by basalt fibres recently. The partially pyrolysed SiOC matr ix based composites at 650°C were used for this study. All production parameters remain the same only reinforcing fibres were different. This work aims at the fibre chemical composition effect on the mechanical properties of composites. The strong effect of the fibres used is observed on the flexural strength values where basalt fibres reaching the level of 800 MPa. The composites reinforced by carbon and R Glass reached 200 MPa and E Glass only 125 MPa. The fracture toughness values correspond well with the flexural strength results which are in a good agreement with the expectations when the defect size is on the comparable level. Two silicate glass fibres with similar chemical composition as basalt fibres, differing mainly in the presence of iron oxides what indicates that iron oxide is responsible for an optimal fibre – matrix bonding in case of basalt fibre reinforced composite. 9th International Conference on Materials Structure and Micromechanics of Fracture Behaviour of Partially Pyrolysed Composite Reinforced by Fibres of Various Compositions Zdeněk Chlup a *, Martin Černý b , Martina Halasová c and Adam Strachota d a CEITEC IPM, Institute of Physics of Materials AS CR, v.v.i., Zizkova 22, 6 6 62 Brno, Czech R public b Institute of Rock Structure and Mechanics AS CR, v.v.i , V Holesovickach 94/41, 182 09 Prague 8, Czech Republic c Institut of Physics of Materials AS CR, v.v.i., Zizk va 22, 6 62 Brno, Czech R public d Institute of Macromolecular Chemistry AS CR, v.v.i., Heyrovskeho nam.2, 162 06 Praha 6 - Brevnov, Czech Republic Abstract Abstract

Keywords: fibre reinforced composites; mechanical properties; partial pyrolysis; fracture Keywords: fibre reinforced composites; mechanical properties; partial pyrolysis; fracture

* Corresponding author. Tel.: +420-532-290-335 E-mail address: chlup@ipm.cz * Correspon ing author. Tel.: +420-532-290-335 E-mail address: chlup@ipm.cz

2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/) Peer-review under responsibility of the scientific committee of the IC MSMF organizers. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. This is an ope acces article under CC BY-NC-ND lic nse (http://creativecommon org/licenses/by-nc-nd/4.0/)

Peer-review under responsibility of the scientific committee of the IC MSMF organizers.

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