Search
×

Sign up

Use your Facebook account for quick registration

OR

Create a Shvoong account from scratch

Already a Member? Sign In!
×

Sign In

Sign in using your Facebook account

OR

Not a Member? Sign up!
×

Sign up

Use your Facebook account for quick registration

OR

Sign In

Sign in using your Facebook account

Shvoong Home>Science>PRELIMINARY EXPLORATION ON THE MICROCOSMIC EFFECTS OF α-Al_2O_3 POWDER IN VITRIFIED BOND FOR MAKING Summary

PRELIMINARY EXPLORATION ON THE MICROCOSMIC EFFECTS OF α-Al_2O_3 POWDER IN VITRIFIED BOND FOR MAKING

Article Summary   by:TsingHua     Original Author: Diamond & Abrasives Engineering
ª
 
The black core of vitrified SiC grinding wheel of fine grit and high hardness has always been a major R & D target in abrasives industry Based on our research in this area and on special purpose vitrified bond, this paper showed by experiment that, if a certain amount of α-Al 2O 3 powder was introduced, the vitrified bond of high water absorptivity (8%) can have the same hardness, compressive strength, rupture strength, and shearing strength as the bond of the same kind but of low water absorptivity(less than 1%). X ray diffraction and petrographic examination found that the introduction of α-Al 2O 3 powder helped quartz reaction and made the bond reacted more completely SEM observations found that α-Al 2O 3 powder diffused in the bond and formed a reaction layer, which was of very compact and uniform composition No new crystals were found This layer acts as a reinforcing net in the vitrified bond, thus guaranteeing the mechanical strength of vitrified bonded wheel if the wheel is of high porosity
Published: August 30, 2003   
Please Rate this Summary : 1 2 3 4 5
Translate Send Link Print
X

.