Search This Blog

Sunday, 24 November 2013

An Abrasive

An Abrasive Points : An Abrasive, Definition Definition Abrasive comes from the word” ABRADE” which means to rub off. An abrasive substance is a very hard, tough material which has many sharp edges or cutting points, when crushed and ground into grains like sand. An abrasive is any material that can wear away substance softer than itself. Sand and sandstone are perhaps the oldest abrasives known to mankind. Prehistoric man used sand and sandstone to form or shape edges of tools. As tools became more and more important for preservation of life, he became more dependent on natural abrasives for the maintenance of sharp tools.
Abrasives must possess three common properties:
(1) Hardness (2) Fracture resistance (3) Wear resistance

No comments:

Post a Comment

Dont paste link here..