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In-depth analysis of the influence of bio-silica filler(Didymosphenia geminata frustules)on the properties of Mg matrix composites

引用

Journal of Magnesium and Alloys 2023年第8期11卷 2853-2871页

作者： Izabela B.Zgłobicka Anna Dobkowska Aleksandra Zielińska ewa borucinska Mirosław J.Kruszewski RafałZybała Tomasz Płociński Joanna Idaszek Jakub Jaroszewicz Krystian Paradowski Bogusława Adamczyk-Cieślak Kostiantyn Nikiforow Bartosz Bucholc WojciechŚwięszkowski Krzysztof J.Kurzydłowski Faculty of Mechanical Engineering Bialystok University of TechnologyWiejska 45C15-351 BialystokPoland Faculty of Materials Science and Engineering Warsaw University of TechnologyWoloska 14102-507 WarsawPoland Lukasiewicz Research Network–Institute of Microelectronics and Photonics Al.Lotnikow 32/4602-668 WarsawPoland Institute of Physical Chemistry Polish Academy of Sciences Kasprzaka 44/5201-224 WarsawPoland Institute of Fundamental Technological Research Polish Academy of Sciences Pawinskiego 5B02-106WarsawPoland

A novel metal matrix composites(MMC)with Mg matrix reinforced with natural filler in the form of Didymosphenia geminata frustules(algae with distinctive siliceous shells)are presented in this *** plasma sintering(PPS)was used to manufacture Mg-based composites with 1,5 and 10 vol.%ceramic *** a reference,pure Mg was *** results show that the addition of 1 vol.%Didymosphenia geminata frustules to the Mg matrix increases its corrosion resistance by supporting passivation reactions,and do not affect the morphology of L929 *** of 5 vol.%the filler does not cause cytotoxic effects,but it supports microgalvanic reactions leading to the greater corrosion *** content than 5 vol.%the filler causes significant microgalvanic corrosion,as well as increases cytotoxicity due to the greater micro-galvanic effect of the composites containing 10 and 15 vol.%*** results of contact angle measurements show the hydrophilic character of the investigated materials,with slightly increase in numerical values with addition of amount of ceramic *** addition of Didymosphenia geminata frustules causes changes in a thermo-elastic properties such as mean apparent value of coefficient of thermal expansion(CTE)and thermal conductivity(λ).The addition of siliceous reinforcement resulted in a linear decrease of CTE and reduction in thermal conductivity over the entire temperature *** the increasing addition of Didymosphenia geminata frustules,an increase in strength with a decrease in compressive strain is *** all composites an increase in microhardness was *** results clearly indicate that filler in the form of Didymosphenia geminata frustules may significantly change the most important properties of pure Mg,indicating its wide potential in the application of Mg-based composites with a special focus on biomedical use.

关键词： Metal-matrix composites(MMCs) Pulse plasma sintering(PPS) Ceramic filler Microstructure Properties

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