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Quantitative multi-scale characterization of single basalt fibres: Insights into strength loss mechanisms after thermal conditioning

机译：单玄武岩纤维的定量多尺度表征：热处理后强度损耗机制的见解

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摘要

This article presents an experimental investigation to quantify the effects of high temperature exposure (400-600 °C) on the mechanical properties of single basalt fibres. To this purpose, a combination of single edge notch tension and nanoindentation micro-pillar splitting methods was used to provide an assessment of the fracture toughness of as-received and thermally treated basalt fibres. Similar values were obtained by the two different methods, and interestingly both highlighted an increase in K_k after heat treatment, up to 22% after exposure at 600 °C for 1h (1.59 ± 0.06 MPa~(1/2)m). The increase in K_k suggests that microstructural changes occur in the fibres, as confirmed by high-speed nanoindentation mapping. Local radial heterogeneity in the fibre structure and elastic modulus and, possibly, the loss of defect orientation originally induced during the fibre drawing process are envisaged to control the decay of basalt fibres tensile strength during high temperature exposure, mimicking a thermal recycling process for composites.
机译：本文提出了一种实验研究，以量化高温暴露（400-600°C）对单玄武岩纤维的机械性能的实验研究。为此目的，使用单边缘凹槽张力和纳米狭窄微柱分裂方法的组合来提供评估接收和热处理的玄武岩纤维的裂缝韧性。通过两种不同的方法获得了类似的值，有意义地突出了热处理后K_K的增加，在600℃下暴露后的曝光率高达22％（1.59±0.06MPa〜（1/2）m）。 K_K的增加表明，通过高速纳米狭窄映射确认，在纤维中发生微观结构变化。局部径向异质性在纤维结构和弹性模量中，并且可能是在纤维拉伸过程中最初诱导的缺陷取向的损失，以控制高温暴露过程中玄武岩纤维拉伸强度的衰减，模仿复合材料的热回收过程。

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  • 来源
    《Materials Science and Engineering》 |2020年第21期|139963.1-139963.10|共10页
  • 作者

    Matteo Lilli; Edoardo Rossi; Jacopo Tirillo; Fabrizio Sarasini; Lorenzo Di Fausto; Teodoro Valente; Carlos Gonzalez; Andrea Fernandez; Claudio Saul Lopes; Riccardo Moscatelli; Edoardo Bemporad; Marco Sebastiani;

  • 作者单位

    Department of Chemical Engineering Materials Environment Sapienza - Universila di Roma and UdR INSTM Via Eudossiana 18 00184 Rome Italy;

    Engineering Department and INSTM unit Universita degli studi Roma Tre Via delta Vasca Navale 79 00146 Rome Italy;

    Department of Chemical Engineering Materials Environment Sapienza - Universila di Roma and UdR INSTM Via Eudossiana 18 00184 Rome Italy;

    Department of Chemical Engineering Materials Environment Sapienza - Universila di Roma and UdR INSTM Via Eudossiana 18 00184 Rome Italy;

    Department of Chemical Engineering Materials Environment Sapienza - Universila di Roma and UdR INSTM Via Eudossiana 18 00184 Rome Italy;

    Department of Chemical Engineering Materials Environment Sapienza - Universila di Roma and UdR INSTM Via Eudossiana 18 00184 Rome Italy;

    IMDEA Materials C/Eric Kandel 2 28906 Getafe Madrid Spain;

    IMDEA Materials C/Eric Kandel 2 28906 Getafe Madrid Spain Materials Science and Engineering Department University Carlos Ⅲ of Madrid Spain;

    IMDEA Materials C/Eric Kandel 2 28906 Getafe Madrid Spain Claudio S. Lopes Luxembourg Institute of Science and Technology Avenue des Hauts-Fourneaux 5 L-4362 Esch-sur-Alzette Luxembourg;

    Engineering Department and INSTM unit Universita degli studi Roma Tre Via delta Vasca Navale 79 00146 Rome Italy;

    Engineering Department and INSTM unit Universita degli studi Roma Tre Via delta Vasca Navale 79 00146 Rome Italy;

    Engineering Department and INSTM unit Universita degli studi Roma Tre Via delta Vasca Navale 79 00146 Rome Italy;

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  • 正文语种 eng
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  • 关键词

    Fracture mechanics; Amorphous materials; Ceramics; Fracture behaviour;

    机译：骨折力学;非晶材料;陶瓷;骨折行为;

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