Reaction products of Al/TiC composites fabricated by the pressureless infiltration technique

Abstract

The interfacial reaction products of the Al-Mg/TiC p composite fabricated by the pressureless infiltration method were analyzed using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), and transmission electron microscopy (TEM). During the fabrication of composites, reaction products with various morphologies and sizes were formed in the Al matrix as well as in the vicinity of the TiC particles by the interfacial reaction between the Al alloy and the TiC particles. From the EDS and selected-area diffraction pattern (SADP) analysisbe identified to form as interfacial reaction products. Both the size and the amount of the reaction products were increased with increasing fabrication temperature as well as fabrication time. Coarse Al 3 Ti was barely observed in water-quenched composites, while it was observed at all fabrication temperatures (700°C to 1000°C) in furnace-cooled conditions.

Synthesis and characterization of titanium carbide particulate reinforced AA6082 aluminium alloy composites via friction stir processing

“…The temperature of the process plays a key role to initiate any kind of reaction between the TiC particle and the matrix. Lee et al [32] exclusively analyzed the various reaction products at the interface of TiC and aluminium matrix in Al/TiC AMCs prepared by infiltration casting route. The local temperature developed during FSP is very low compared to liquid metallurgy routes to initiate interfacial reaction.…”

Fabrication and Characterizations of Mechanical Properties of Al-4.5%Cu/10TiC Composite by <i>In-situ</i> Method

“…TiC particles form only when reaction temperature was more than 1000˚C. TiC particles were spherical, needle or block in shape with smooth and clear surface [20][21][22][23]. Figure 5(b) shows that the size and shape of TiC particles formed were from 0.1 µm to 0.8 µm with spherical shape.…”

Characteristic reaction products in the AZ91/SiC composite fabricated by pressureless infiltration technique

“…The AZ91/SiC composite used in this study was fabricated by the pressureless infiltration method, and the fabrication *Corresponding author: hkwon@kookmin.ac.kr ©KIM and Springer 2009 setup was identical to the one used for the fabrication of Al matrix composites [13,14]. The average sizes of Mg, Al, Zn, and SiC particles used in this study were approximately 13 µm, 50 µm, 20 µm, and 22 µm, respectively.…”

“…The pressureless infiltration method is an innovative technique for fabricating MMCs by the spontaneous infiltration of a molten Al alloy containing Mg into a ceramic filler or preform under a nitrogen atmosphere, without the aid of a vacuum or externally applied pressure [4,5,13,14]. Although there have been many reports on Al alloy matrix composites fabricated by the pressureless infiltration method, few publications have appeared on Mg alloy matrix composites.…”