Abstract
In this study, chemically bonded phosphate ceramic (CBPC) fiber reinforced composites were made at indoor temperatures. The mechanical properties and microstructure of the CBPC composites were studied. The CBPC matrix of aluminum phosphate binder, metakaolin, and magnesia with different Si/P ratios was prepared. The results show that when the Si/P ratio was 1.2, and magnesia content in the CBPC was 15%, CBPC reached its maximum flexural strength. The fiber reinforced CBPC composites were prepared by mixing short polyvinyl alcohol (PVA) fibers or unidirectional continuous carbon fiber sheets. Flexural strength and dynamic mechanical properties of the composites were determined, and the microstructures of specimens were analyzed by scanning electron micrography, X-ray diffraction, and micro X-ray computed tomography. The flexural performance of continuous carbon fiber reinforced CBPC composites was better than that of PVA fiber composites. The elastic modulus, loss modulus, and loss factor of the fiber composites were measured through dynamic mechanical analysis. The results showed that fiber reinforced CBPC composites are an inorganic polymer viscoelastic material with excellent damping properties. The reaction of magnesia and phosphate in the matrix of CBPC formed a different mineral, newberyite, which was beneficial to the development of the CBPC.
Highlights
Bonded Phosphate Ceramics (CBPCs) refers to a class of materials that are formed by a controlled acid-base reaction, which takes place at lower temperatures compared to sintered ceramics [1]
It can be seen that when the content of the polyvinyl alcohol (PVA) fiber was the same, the flexural strength of the samples without magnesia was significantly lower than the comparable samples that contained magnesia
Fiber reinforced chemically bonded phosphate ceramic (CBPC) composites were fabricated at indoor temperatures
Summary
Bonded Phosphate Ceramics (CBPCs) refers to a class of materials that are formed by a controlled acid-base reaction, which takes place at lower temperatures compared to sintered ceramics [1]. CBPCs have high compressive strength, high resistance to high temperature and acidic environments Their applications can fill the gap between the traditional hydraulic cements and the sintered ceramics [1,2]. CBPCs have many applications in the fields of structures, composites, and biomedical, high temperature environments. The microstructure of MPC based CBPC matrix consists of crystal (newberyite, struvite, and periclase) and amorphous phases [7,8,9]. These crystals behave like the fine aggregate in cement, which enhances the CBPC’s mechanical property and volume
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
