id	keyword
alkej-221	erosion
alkej-221	coating
alkej-221	composites
alkej-221	wear
alkej-221	weight
alkej-221	fiber
alkej-221	epoxy
alkej-221	materials
alkej-221	glass
alkej-221	engineering
alkej-221	ash
alkej-221	sample
alkej-221	journal
alkej-221	vol
alkej-221	spin