Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Study of Lightweight Ceramic Matrixless Syntactic Foam Composed of Cenospheres Using Spark Plasma Sintering

Version 1 : Received: 29 December 2023 / Approved: 29 December 2023 / Online: 29 December 2023 (16:17:10 CET)

A peer-reviewed article of this Preprint also exists.

Eiduks, T.V.; Drunka, R.; Abramovskis, V.; Zalite, I.; Gavrilovs, P.; Baronins, J.; Lapkovskis, V. Study of Lightweight Ceramic Matrix-Less Syntactic Foam Composed of Cenosphere Using Spark Plasma Sintering. Materials 2024, 17, 450. Eiduks, T.V.; Drunka, R.; Abramovskis, V.; Zalite, I.; Gavrilovs, P.; Baronins, J.; Lapkovskis, V. Study of Lightweight Ceramic Matrix-Less Syntactic Foam Composed of Cenosphere Using Spark Plasma Sintering. Materials 2024, 17, 450.

Abstract

The current investigation presents porous ceramic materials prepared of cenospheres prepared by spark plasma sintering. The impact of sintering temperature, mould diameter (20 and 30 mm diameter) and cenosphere size on the properties of the sintered material was investigated. Shrinkage of the samples during sintering started at 900 °C. Sample shrinkage during sintering increases with increasing temperature and decreases with increasing mould size; increasing sample sintering temperature increases the apparent density of all sample series CS 63-150 µm in 20 mm mould from 0.97 to 2.3 g·cm-3 at 1050 - 1300 °C, in 30 mm mould 0.81 - 1.87 g·cm-3 at 1050 - 1200 °C, in 50 mm mould 0.54 - 0.75 g·cm-3 at 1050 - 1150 °C, while CS 150-250 µm in 20 mm mould 0.93 - 1.96 g·cm-3 at 1050 - 1200 °C. Total porosity decreases from 61.5% to 3.9% with increasing sintering temperature from 1050 to 1250 °C, while open porosity reduces at lower temperatures, with closed porosity being highest in samples sintered at 1150 °C. When the sintering temperature increases from 1050 to 1300 °C, the compressive strength of the CS 63-150 samples produced in a 20 mm mould increases from 11 MPa to 312 MPa. These results correlate with the Rice model, which describes an exponential dependence of compressive strength on material porosity and fully dense material compressive strength.

Keywords

spark plasma sintering; matrixless syntactic foam; cenospheres; porosity; compressive strenght; SiO2; XRD; shrinkage; apparent density.

Subject

Chemistry and Materials Science, Ceramics and Composites

Comments (0)

We encourage comments and feedback from a broad range of readers. See criteria for comments and our Diversity statement.

Leave a public comment
Send a private comment to the author(s)
* All users must log in before leaving a comment
Views 0
Downloads 0
Comments 0


×
Alerts
Notify me about updates to this article or when a peer-reviewed version is published.
We use cookies on our website to ensure you get the best experience.
Read more about our cookies here.