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Open AccessArticle

An Investigation of Fiber Reinforced Chemically Bonded Phosphate Ceramic Composites at Room Temperature

by Zhu Ding 1, Yu-Yu Li 1, Can Lu 2 and Jian Liu 1,*
1
Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, College of Civil Engineering, Shenzhen University, Shenzhen 518060, China
2
Infrastructure Construction Department, Shenzhen Polytechnic, Shenzhen 518055, China
*
Author to whom correspondence should be addressed.
Materials 2018, 11(5), 858; https://doi.org/10.3390/ma11050858
Received: 12 April 2018 / Revised: 14 May 2018 / Accepted: 15 May 2018 / Published: 21 May 2018
(This article belongs to the Special Issue Carbon Fiber Reinforced Polymers)
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. View Full-Text
Keywords: chemically bonded phosphate ceramic; fiber reinforced composites; PVA fiber; continuous carbon fiber sheet; acid activation; dynamic mechanical analysis chemically bonded phosphate ceramic; fiber reinforced composites; PVA fiber; continuous carbon fiber sheet; acid activation; dynamic mechanical analysis
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MDPI and ACS Style

Ding, Z.; Li, Y.-Y.; Lu, C.; Liu, J. An Investigation of Fiber Reinforced Chemically Bonded Phosphate Ceramic Composites at Room Temperature. Materials 2018, 11, 858.

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