id	keyword
alkej-465	nanoparticles
alkej-465	type
alkej-465	wear
alkej-465	� �
alkej-465	hardness
alkej-465	energy
alkej-465	impact
alkej-465	base
alkej-465	engineering
alkej-465	journal
alkej-465	media
alkej-465	rate
alkej-465	temperature
alkej-465	percentage