Behera, Susri Sangeeta (2012) Sol-gel synthesis of borosilicate vitrified bond for Diamond grinding wheel. BTech thesis.
Vitrified bond diamond composites were prepared by using commercial diamond grits and a low melting sodium borosilicate glass vitrified bond. Sodium borosilicate glass with composition: 50 SiO2. 20 B2O3 .10 Al2O3. 10 Na2O, 8 K2O and 2 ZnO (mol%) was synthesised through sol-gel process using TEOS , Boric acid , NaNO3, Al2O3, KNO3, Zn(NO3) and HNO3 as catalyst.
Thermal decomposition behaviour of gel was studied using TG & DSC. The glass forming temperature was identified and characterised by XRD studies at different stages. Initial gel shows very little boron in glassy network. A complete amorphous glass was obtained heating the gel at 700˚C.
Calcined glass powder was used as a bonding material for diamond grits. Bonding behaviour between diamond & glass was investigated by optical microscopy. An optimal amount of vitrified bond for diamond grits with 250 micron was 5:2 (wt%) diamond: bond and sintering the composite in air atmosphere at 650 to 700 C
|Item Type:||Thesis (BTech)|
|Uncontrolled Keywords:||SOL- GEL, BOROSILICATE GLASS, VITRIFIED BOND, DIAMOND GRINDING WHEEL,|
|Subjects:||Engineering and Technology > Ceramic Engnieering > Ceramic Materials|
Engineering and Technology > Ceramic Engnieering > Ceramic Processing
|Divisions:||Engineering and Technology > Department of Ceramic Engineering|
|Deposited By:||Susri Sangeeta Behera|
|Deposited On:||29 May 2012 18:46|
|Last Modified:||29 May 2012 18:46|
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