Study On The Microstructure, Grow Mechanism Of Reinforcement And Interface In In Situ Synthesized Ferrous Matrix Composite

Compared with traditional techniques, in situ technique owe following advantages: it is very simple and material's properties are excellent, so it is easier to fabricate Fe matrix composites in technology and economic. Ceramic particle of in situ synthesis avoids pollution and wettability existing in casting technique, so it is valuable to fabricate Fe matrix composite with better properties. But at present, more attentions are fastened upon preparation progress and MMCs' mechanical properties. As the reasons mentioned, TiCp/Fe and VCp/Fe composite have been prepared and their microstructure, reinforcement growth mechanism, interface also have been studied.1 , Fe matrix composites reinforced with TiC or VC have been produced by in situ technique. The results of X ray diffraction show that the in situ synthesized reinforcements are TiC and VC. We can conform the first strongest peak of TiC is (200) and VC is (111).2, The reinforcements were distributed uniformly in matrix alloy. The shape of TiC is quadrangle or near-equated shape, and VC has the shape of whisker. Qualitative analysis of element distribution told us that there are a spot of Fe dissolved in reinforcements and a few of Ti or V dissolved in matrix. In TiC/Fe composite, some graphite is created.3 , TiC reinforcements' growth mechanism were discussed from kinetics, solification and crystalline structure. Augmenting solute concentration and...