Article ID Journal Published Year Pages File Type
1623665 Journal of Alloys and Compounds 2009 7 Pages PDF
Abstract

Influence of reactant (Cr, Ti and B4C) particle size on the SHS reaction products in 30 wt.% Cr–Ti–B4C system has been investigated. Particle size of Cr powder has a significant effect on the phase compositions and microstructures of SHS reaction products. The SHS reaction in Cr–Ti–B4C system with nano-size Cr goes more complete and occurs more easily than that in the system with micron-size Cr. Increase in particle size of B4C powder has a little effect on the phase compositions of SHS reaction products, which consist of TiB2, TiC and Cr phases as well as transient phase Cr5B3 and a trace of C, but results in the increase of the amount of Cr5B3. Furthermore, the average sizes of TiB2 and TiC increase from ∼0.5 and ∼1 μm to ∼2 and ∼3 μm, respectively, as the B4C particle size increases from ∼3.5 to 40 μm. Increase in particle size of Ti powder (∼38, ∼48 and ∼74 μm) has little influence on the phase compositions of the products, as well as average sizes and morphologies of TiB2 and TiC.

Related Topics
Physical Sciences and Engineering Materials Science Metals and Alloys
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