Synthesis of TiB2-Al2O3 nanostructure through Mechanochemical process |
Paper ID : 1544-UFGNSM-FULL |
Authors: |
Abstract: |
The development of ceramic-matrix composites (CMCs) is of increasing interest because they can enhance the intrinsically low fracture resistance of monolithic ceramics. Typical ceramic systems that are of such interest are nanostructure composites as they are recognized as valid candidates for technological applications under extreme conditions due to their excellent combination of mechanical and electrical properties. The nanostructure composites of TiB2 such as TiB2-Al2O3 are useful in variety of applications such as cutting tools, wear-resistant substrates, and lightweight armor. On the other hand, recently, mechanical activation and mechanical milling have been extensively implemented for preparing and synthesizing nanostructure composite powders and advanced materials. In this present research work, TiB2-Al2O3 nanostructure composite was produced using mixtures of titanium dioxide, acid boric and pure aluminum as raw materials through mechanochemical process. The milled powders were studied by XRD, SEM analytical techniques. According to the XRD patterns, Synthesis of TiB2-Al2O3 nanostructure was not occurred until 40 h milling process. XRD analyses exhibited that the TiB2-Al2O3 nanostructure was formed after this milling time. The results indicate that increasing milling time up to 80 h had no significant effect other than refining the crystallite sizes of the components specially TiB2. |
Keywords: |
nanostructure; Mechanochemical process; crystallite size; TiB2 |
Status : Paper Accepted (Poster Presentation) |