Počet záznamů: 1
Effect of the exposition temperature on the behaviour of partially pyrolysed hybrid basalt fibre composites
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SYSNO ASEP 0491298 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Effect of the exposition temperature on the behaviour of partially pyrolysed hybrid basalt fibre composites Tvůrce(i) Chlup, Zdeněk (UFM-A) RID, ORCID
Černý, Martin (USMH-B) RID, ORCID, SAI
Strachota, Adam (UMCH-V) RID, ORCID
Hadraba, Hynek (UFM-A) RID, ORCID
Kácha, Petr (USMH-B)
Halasová, Martina (UFM-A)Celkový počet autorů 6 Zdroj.dok. Composites Part B-Engineering. - : Elsevier - ISSN 1359-8368
Roč. 147, AUG (2018), s. 122-127Poč.str. 6 s. Jazyk dok. eng - angličtina Země vyd. GB - Velká Británie Klíč. slova reinforced polymer composites ; mechanical-properties ; elevated-temperatures ; glass ; conversion ; Fibres ; Thermosetting resin ; Heat treatment ; Mechanical properties Vědní obor RIV JH - Keramika, žáruvzdorné materiály a skla Obor OECD Ceramics Vědní obor RIV – spolupráce Ústav struktury a mechaniky hornin - Keramika, žáruvzdorné materiály a skla
Ústav makromolekulární chemie - Makromolekulární chemieCEP LQ1601 GA MŠMT - Ministerstvo školství, mládeže a tělovýchovy GA17-12546S GA ČR - Grantová agentura ČR Institucionální podpora UFM-A - RVO:68081723 ; UMCH-V - RVO:61389013 ; USMH-B - RVO:67985891 UT WOS 000437064900013 EID SCOPUS 85045701730 DOI 10.1016/j.compositesb.2018.04.021 Anotace Composites utilising long fibres as reinforcement are the most effective from the point of view of the toughening effect. A brittle matrix reinforced by brittle fibres was investigated in this work. Polysiloxane resin was used as matrix precursor in the studied composite, while continuous basalt fibres served as reinforcement. An optimised pyrolysis process conducted at 650 degrees C under nitrogen atmosphere turned the polymeric precursor into the so-called hybrid matrix consisting of nano-domains of pyrolytic SiOC glass and of non-transformed polysiloxane polymer. The pyrolysis temperature of 650 degrees C was found to be optimal, resulting in the fracture toughness attacking the level of 20 MPa m(1/2) and the strength reaching the value of 1 GPa. The main aim of this paper is to investigate microstructural changes occurring during long-term (1000 h = 41.7 days) exposition to an oxidative air atmosphere at temperatures from 250 degrees C to 600 degrees C and to describe the effect on the mechanical properties of the studied hybrid-matrix composite. The increasing exposition temperature leads to a significant embrittlement of the composite, while the elastic properties (modulus) remain unchanged. Chemical or microstructural changes in the basalt fibres were not detected after the long-term exposition to the tested high temperatures. Nevertheless, fibre embrittlement can be estimated from the tests. Both matrix and fibre-matrix interface were found to suffer from the applied exposition. Distinct changes in chemical composition as well as in microstructure were observed for the matrix. Hence, the observed embrittlement of the composite can be ascribed partly to the changes in the hybrid matrix and the fibre-matrix interface, and partially to fibre embrittlement. Pracoviště Ústav fyziky materiálu Kontakt Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485 Rok sběru 2019
Počet záznamů: 1