Showing papers by "Srinivasa R. Bakshi published in 2015"
TL;DR: In situ composites are a class of composite materials in which the reinforcement is formed within the matrix by reaction during the processing as mentioned in this paper, and they have been widely followed by researchers because of several advantages over conventional stir casting such as fine particle size, clean interface, and good wettability of the reinforcement with the matrix and homogeneous distribution of reinforcement compared to other processes.
Abstract: In situ composites are a class of composite materials in which the reinforcement is formed within the matrix by reaction during the processing. In situ method of composite synthesis has been widely followed by researchers because of several advantages over conventional stir casting such as fine particle size, clean interface, and good wettability of the reinforcement with the matrix and homogeneous distribution of the reinforcement compared to other processes. Besides this, in situ processing of composites by casting route is also economical and amenable for large scale production as compared to other methods such as powder metallurgy and spray forming. Commonly used reinforcements for Al and its alloys which can be produced in situ are Al2O3, AlN, TiB2, TiC, ZrB2, and Mg2Si. The aim of this paper is to review the current research and development in aluminum-based in situ composites by casting route.
158 citations
TL;DR: In this paper, the effect of Sc addition on the grain refinement, modification of the eutectic Si, mechanical and wear properties of A356 and A356-10-wt% TiB2 in situ composite has been investigated.
63 citations
TL;DR: In this article, the influence of milling time and sintering temperature on the in-situ reactive synthesis, densification, grain size and mechanical properties of TiB 2 compacts was investigated.
Abstract: In this study, the low temperature synthesis of dense titanium diboride (TiB 2 ) compacts by reaction spark plasma sintering (RSPS) of ball milled mixtures of titanium and boron powders is presented. The influence of milling time and sintering temperature on the in-situ reactive synthesis, densification, grain size and mechanical properties of TiB 2 was investigated. TiB 2 compacts with relative density above 99% have been obtained at a significantly low sintering temperature of 800 °C. X-ray diffraction analysis confirmed the formation of TiB 2 along with a small amount of secondary TiB phase. The effect of TiB on the grain size and the hardness and fracture toughness was investigated. TiB 2 compacts processed were found to have a nanohardness > 26 GPa and an elastic modulus > 570 GPa and indentation fracture toughness more than 3.30 MP a.m 1/2 . It is shown that RSPS can be an attractive route for synthesis of ultrahigh temperature ceramics at low temperatures.
41 citations
06 Feb 2015
5 citations
3 citations