abrasive
n.
研磨剂
adj.
研磨的
(1)Ahardsubstanceusedforgrinding,honing,lapping,superfinishing,polishing,pressureblasting,orbarrelfinishing.Abrasivesincommonusearealumina,siliconcarbide,boroncarbide,diamond,cubicboronnitride,garnet,andquartz.
(2)Hardparticles,suchasrocks,sand,orfragmentsofcertainhardmetals,thatwearawayasurfacewhentheymoveacrossitunderpressure.Seealsosuperabrasives.