| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1603826 | International Journal of Refractory Metals and Hard Materials | 2012 | 4 Pages |
Alumina-titanium diboride nano-composite powder was prepared from TTIP and boron oxide using a sol–gel method followed by mechano-chemical reduction in the presence of Al. Optimum weight ratio of B2O3:TTIP in solution was 1:3. The XRD results reveal that mechano-chemical reduction of the gel resulted in the formation of TiB2 and Al2O3 after 30 h milling. Also, FTIR spectroscopy of 30 h milled product seams to confirm the formation of TiB2 and Al2O3 phases in the final product. Scanning electron microscopy showed that the product has a wide range of particle size between 100 nm–2 μm. Transmission electron microscopy study of the product revealed a microstructure in which TiB2 particles dispersed in Al2O3 matrix with a crystallite size of 10–30 nm. The homogeneity of the composite powder and low temperature of the process distinguished the present study from the previous researches.
► TiB2–Al2O3 nano-composite powder was produced by milling assisted sol–gel method. ► This combination of methods has been used for the first time for this nano-composite. ► Particles of Al2O3–TiB2 composite indicated to have a crystallite size of 10–30 nm. ► TEM image shows a microstructure in which TiB2 particles embedded in Al2O3 matrix.
