A Brief Review of Fly Ash as Reinforcement for Composites with Improved Mechanical and Tribological Properties

Fly ash (FA) is one of the particulate wastes generated during combustion of coal in thermal power plants. Around 110 million tons of FA is generated in the USA every year, and 60% of it is deposited in landfills. Utilization of FA can create value for this waste material and also help the environme...

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Bibliographic Details
Published in:JOM (1989) 2020-06, Vol.72 (6), p.2340-2351
Main Authors: Kasar, Ashish K., Gupta, Nikhil, Rohatgi, Pradeep K., Menezes, Pradeep L.
Format: Article
Language:English
Subjects:
Alloys
Aluminum
Automobile industry
Cenospheres
Chemical reactions
Chemistry/Food Science
Coal-fired power plants
Composite materials
Earth Sciences
Electric power generation
Engineering
Environment
Fly ash
Mechanical properties
Metal and Polymer Matrix Composites
Metal oxides
Metals
Physics
Polymer matrix composites
Polymers
Skeletal composites
State-of-the-art reviews
Tensile strength
Thermal expansion
Thermal power plants
Tribology
Waste materials
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Summary:Fly ash (FA) is one of the particulate wastes generated during combustion of coal in thermal power plants. Around 110 million tons of FA is generated in the USA every year, and 60% of it is deposited in landfills. Utilization of FA can create value for this waste material and also help the environment. FA is essentially a mixture of metal oxides that can be used as a filler reinforcement in metal and polymer composites. FA as a filler material reduces the amount of metals and polymer, reducing embodied energy. Hollow FA particles, called cenospheres, can provide the advantage of low density in composites as well as higher hardness and strength. FA also reduces the coefficient of thermal expansion. This article provides a brief review to capture the state of the art on the mechanical and tribological behavior of composites reinforced with FA to identify the possible benefits of using this waste material. The corrosion performance of metal matrix FA composites is also explored. Future perspectives in this field are discussed based on the potential applications of FA-filled composites.
ISSN:1047-4838
1543-1851
DOI:10.1007/s11837-020-04170-z